Begin
Lead Researcher's Log: The Puget Sound
Ground
Welcome, Researcher.
You are standing at the threshold of a complex and beautiful ecosystem: The Puget Sound.
Examine
This journal is your primary tool for navigating the maritime microclimates and unique glacial soils of the Pacific Northwest.
As you move through these pages, you will gather the data needed to build a resilient, sustainable garden that thrives in our specific lowland environment.
Map
The tools are laid out, the map is pinned, and the field study is officially open.
Apply
Let's begin.
Next
Back
Begin
Field Manual Navigation
To complete this study, navigate through the research phases using the index to your right. The hummingbird indicates the current phase.
Ground
This Field Journal and Guide covers the following topics divided into research phases:
Ecosystems, Adaptations, and Tag Data
Orientation and Project Goals
Soil & Climate Foundation
Regional Microclimates
Final Field Test
Examine
Look for the blinking blue buttons for interactions and researcher's insights!
Hover over and click images to open informational windows.
Interact with the floral icons to the right to return to the desired research phase.
Map
Apply
Next
Back
Begin
Researcher's Technical Kit
Ground
Before heading into the field, ensure your equipment is calibrated for the best interactive experience:
Connectivity
Hardware
Browser
Examine
Audio
Interactivity
Map
Apply
Click each icon for more information
Next
Back
08/24/2019
Begin
Researcher’s Checklist: Criteria for Mastery
Ground
Complete the following observations to certify your field journal.
Ground
Examine
You got this, Lead Researcher!
Examine
05/12/1985
Apply
03/30/2011
Map
Map
06/29/2023
Apply
Next
Back
Begin
The Three Pillars of the PNW Ground
Ground
Regional Scope & Environmental Context
To garden effectively in the Pacific Northwest, we must first define our research site. The Puget Sound Lowlands consist of the glaciated trough sitting between the Cascade Range and the Olympic Mountains. Our study focuses on the "Urban Corridor" counties, where shared geological history dictates our success:
Our field research will prioritize Three Pillars of Cultivation:
Examine
Hardiness
Map
Glacial Till
- King County (Primary Research Site)
- Snohomish, Pierce, Thurston, Kitsap Counties
Soil Health
Click on the soil profiles to investigate the Three Pillars
Apply
Next
Back
Begin
Pillar 1: Hardiness Zones
In the Puget Sound Lowlands, our research focuses on USDA Hardiness Zones 8a, 8b, and 9a. These classifications are based on the average annual minimum winter temperature, which dictates whether a perennial can survive in the ground year-round.
Ground
Hover over the counties to see their specific Hardiness Zones
Examine
The Puget Sound Paradox
Snohomish County
Kitsap County
Map
King County
Growing Degree Days (GDD)
The Maritime Buffer
Thurston County
Pierce County
Hardiness zones indicate if a plant will live; GDD indicates if it will flourish.
Apply
Next
Back
Begin
Pillar 2: Glacial Till
The Mechanical Constraint
Ground
In the Puget Sound Lowlands, our research must account for the geological footprint of the Vashon Glacier. Approximately 14,000 years ago, as the ice receded, it deposited Glacial Till: a dense, unsorted mixture of clay, silt, sand, and gravel.
Examine
Under the immense weight of the ice, this material was compressed into Hardpan—a nearly impenetrable, concrete-like layer.
Map
This creates a primary challenge for local cultivation: poor infiltration, where water pools on top of the soil rather than soaking through to the roots.
Apply
Click the markers in the soil profile to excavate each layer's secrets.
Next
Back
Begin
Pillar 3: Soil Health
Building the Floor
Ground
The Why: Working with the Barrier
In traditional gardening, people are told to "dig a hole twice as wide as the root ball." In the Puget Sound Lowlands, that advice often leads to a "Bathtub Effect" where the hole holds water against the hardpan and drowns the plant.
Examine
Map
A "sponge" for dry Augusts that provides essential drainage during wet Decembers.
The Soil Sponge
We can’t change Vashon Till structure, only the environment on top.
The Mechanical Constraint
Stacked organic layers invite worms and fungi to aerate the tough upper till for you.
The Biological Engine
Apply
Next
Back
1. Click the icons for further explanation.
2. Click the interactive button to build the layers.
Begin
Pillar 3: Soil Amendments
Lasagna Gardening
Ground
We can use the "Lasagna Method" by building atop existing soil. This technique allows use to create our own biological engine without having to dig and make soil amendments in the ground.
Examine
Layer 1: The Base
The Weed Barrier
Map
Layer 2: The Nutrients
The Energy
Layer 3: The Blanket
The Armor
Apply
Note: These are the basic foundational layers; for an example of more complex lasagna garden layering click on the interactive button here.
Next
Back
Click on each image to check your knowledge
Begin
Check Your Notes
Knowledge Check
Ground
Examine
Map
Apply
Next
Back
Begin
Examine the Field & Specimens
Uncovering Regional Systems, Structural Adaptations, and Tag Data
Ground
Understanding regional Puget Sound ecosystems, plant anatomy, and how to read plant tags is vital for a successful garden, as this knowledge ensures you select appropriate species for the local climate and place them in environmental conditions where they can thrive.
Examine
Plant Anatomy
Regional Ecosystems
Plant Packs
Map
Apply
Next
Back
Click on each image to check your knowledge
Begin
Check Your Notes
Knowledge Check
Ground
Examine
Map
Apply
Next
Back
Begin
Mapping Regional Microclimates
Regional Geography, Maritime Patterns, and Growing Cycles
Ground
The Rain Shadow
Examine
Maritime Moderation
Elevation & Air Drainage
Map
Apply
Next
Back
Begin
Check Your Notes
Knowledge Check
Ground
When mapping out your spring planting schedule for sensitive tubers like Dahlias in the Pacific Northwest, which calendar window is the safest choice to avoid crop-killing frost?"
Examine
Map
Apply
Next
Back
Begin
Field Application
Putting Regional Systems and Data Into Practice
Ground
As a Pacific Northwest grower, success relies on synthesizing soil health, local climate patterns, and seed data simultaneously. Below are three scenarios that often occur in the PNW. Click each card to view the scenario and provide a solution.
Examine
Map
Apply
Next
Back
Begin
Ground
Congratulations, Researcher!
You have successfully mapped the geographical microclimates, braved the "Northwest Concrete" of the Vashon glacial till, and mastered the organic layers of the Lasagna gardening method.
Examine
Your field guide is complete, and your home plot is ready to thrive.
Map
Best of luck out there!
Apply
Next
Back
Begin
Academic References & Citations
I. Geological, Climatic, & Soil Mechanics Data
Ground
Dunagan, C. (2015, September 18). Puget Sound: A uniquely diverse and productive estuary. Encyclopedia of Puget Sound. Tiny Garden Habit. (2026). Infographic showing lasagna garden layers with labeled layers. Facebook.com. Retrieved May 8, 2026, from https://www.facebook.com/photo/?fbid=122186059088763155&set=a.122105387054763155. USDA Agricultural Research Service. (2023). USDA Plant Hardiness Zone Map. US Department of Agriculture. Retrieved May 5, 2026, from https://planthardiness.ars.usda.gov/. Warren County Master Gardeners. (n.d.). Lasagna gardening. Cornell Cooperative Extension of Warren County. Retrieved May 31, 2026, from https://warren.cce.cornell.edu/gardening-landscape/warren-county-master-gardener-articles/lasagna-gardening. Washington Geological Survey. (n.d.). Puget Sound and coastal geology. Washington State Department of Natural Resources. Retrieved May 31, 2026, from https://dnr.wa.gov/washington-geological-survey/explore-popular-geology/puget-sound-and-coastal-geology.
Examine
Map
Apply
Next
Back
Begin
Academic References & Citations
II. Botanical, Species Profile, & Ecological Data
American Horticultural Society. (2022). The encyclopedia of garden plants. DK Publishing. CK-12 Foundation. (2020, June 17). Plant adaptations. LibreTexts. https://bio.libretexts.org/Bookshelves/Introductory_and_General_Biology/Introductory_Biology_(CK-12)/09%3A_Plants/9.23%3A_Plant_Adaptations. Dahlia PAINTER(TM) PINK KISSES. (n.d.). macore.com. Retrieved May 5, 2026, from https://macore.com/categories/lister/34/6/43. FISHBIO. (2021, July 12). Stinky salmon, natural fertilizers. Fishbio.com. Retrieved May 31, 2026, from https://fishbio.com/stinky-salmon-natural-fertilizers/. Garden Design Magazine. (n.d.). Annuals vs. perennials. GardenDesign.com. Retrieved May 31, 2026, from https://www.gardendesign.com/annuals/vs-perennials.html. Hoffman Nursery. (2016, November 28). Sedges' quiet strength. Hoffmannursery.com. https://hoffmannursery.com/blog/article/sedges-quiet-strength. How to read a plant tag. (2017). Young’s Plant Farm. Retrieved May 5, 2026, from https://youngsplantfarm.com/read-plant-tag/. National Audubon Society. (2026). Field guide to North American birds: Western region. U.S. Forest Service. (n.d.). About the area. U.S. Department of Agriculture. Retrieved May 31, 2026, from https://www.fs.usda.gov/r06/about-area. UNC Charlotte Urban Institute. (n.d.). Same spider, different color. University of North Carolina at Charlotte. Retrieved May 31, 2026, from https://ui.charlotte.edu/story/spider-different-color/.
Ground
Examine
Map
Apply
Next
Back
Begin
Academic References & Citations
III. Instructional Design Frameworks
Ground
Anderson, L. W., & Krathwohl, D. R. (Eds.). (2001). A taxonomy for learning, teaching, and assessing: A revision of Bloom's taxonomy of educational objectives. Longman.
Cast. (2018). Universal Design for Learning Guidelines version 2.2. http://udlguidelines.cast.org
Gagne, R. M., Wager, W. W., Golas, K. C., & Keller, J. M. (2005). Principles of instructional design (5th ed.). Wadsworth/Thomson Learning.
Examine
Map
Apply
Next
Back
Begin
Ground
Examine
Map
Apply
Next
Back
Begin
Ground
Examine
Map
Apply
Next
Back
Begin
Ground
Examine
Map
Apply
Next
Back
What anatomical adaptations do local plants have to help them survive in the PNW?
The Puget Sound Paradox
Growing Degree Days (GDD)
GDD measures cumulative heat over time. While we are in a high hardiness zone, our cool nights mean we often lack the sustained heat required for specimens like dahlias to bloom or ripen fully.
Layer 3
The Protector
Cover area with mulch to protect the soil from heavy PNW rain and leaching
Researcher's Insight:
Wood chips and bark offer superior longevity and drainage, acting as a durable "blanket" for PNW garden beds.
Researcher's insight
Genetic vs. Conditional Longevity
While a plant's baseline status as an annual or perennial is hardcoded into its genetics, the environment plays a massive role in how that longevity actually manifests in the field.
Gardener's Notes
Be sure to note the hardiness zones listed on the plant tag to determine whether the plant will be an annual or perennial.
Card 2: Bothell Planting Windows
The Problem: You are scheduling a planting calendar for Dahlias in Snohomish County Hardiness Zone (8b), where spring rains keep the ground cold and wet for months.
The Question: To protect the tubers from rotting in damp soil, what is the critical baseline requirement before planting them outside?
Specimen Study
The Dahlia
While dahlias are hardy in Zone 8, they are the primary victims of the "Puget Sound Paradox". They survive the winter but often lack the summer "heat units" to reach full bloom. They are considered "tender perennials."
FUN FACT
In your Puget Sound garden, starting dahlias indoors in April effectively "cheats" the Paradox by adding 30 days to their Growing Degree Day count.
Which of these pieces of cardboard can be used as the base layer atop existing structure?
Apply
Field Test
Solve site-specific gardening challenges.
Apply and adapt gardening methods and strategies for practice use.
Validate field observations using the Researcher’s Log bibliography and local PNW resources.
Card 3: Utilizing Native Plants
The Problem: A low-lying section of the yard collects heavy rain runoff from the roof line all winter long, leaving the soil completely saturated.
The Question: Applying the regional ecosystem principles from Section 3, which approach best utilizes native plant anatomy to manage this seasonal water?
Region 3
Elevation & Air Drainage
The Foothills
As you move away from the water and toward the Cascade foothills, cold mountain air flows downward and pools in low-lying river valleys.
The Impact
These inland areas experience significantly colder winter lows and unexpected late-spring frosts that can catch growers off guard.
Garden Planning
Shifting to cold-hardy crops and utilizing protective structures like cloches or cold frames is essential for early-season success.
Researcher's Insight
The "SUV" of Nests
Bald Eagles in the Puget Sound are master engineers, building the largest nests in North America along our shorelines.
FUN FACT
By adding new material every year, their nests can reach 10 feet wide and weigh up to two tons—the same as a small SUV!
Build your "lasagna" starting with the top most layer at the top.
What is NOT included on a plant tag?
Interactivity
This journal is touch and click-responsive. Look for the Interactive' pulse icons
Researcher's insight
The Wetland Filter
Native rushes and sedges act as nature's filtration system in the Puget Sound basin.
FUN FACT
Their dense root networks are incredibly efficient at capturing runoff and filtering out urban pollutants before the water can reach local salmon streams!
Pillar 2
Glacial Till
Beneath the surface lies Glacial Till, often called "Seattle Cement." This is a highly compacted, unsorted mix of clay, sand, and rock left behind by the Vashon Glaciation 15,000 years ago.
Researcher's Note: Understanding this compaction is vital for determining where to plant moisture-sensitive specimens.
map
Regional Microclimates
Navigate the Puget Sound Lowlands Map to pinpoint microclimates across the diverse lowland counties.
Identify regional geographic demographics and their impact on plant viability.
Adapt gardening strategies to address geographic constraints.
Pillar 3
Soil Health
This represents the biological foundation of the garden. Successful PNW cultivation requires transitioning from native till to living soil through the heavy use of organic amendments.
Researcher's Note:We will explore how to bypass native drainage issues using raised beds and strategic soil building in the final phase.
Researcher's Insight
The "Hard Drive" Brain
Black-capped Chickadees in the Puget Sound are master memory keepers.
FUN FACT
To remember thousands of hidden seed locations, their hippocampus grows by 30% every autumn—essentially expanding their "internal hard drive" for the winter!
What information is commonly found on plant tags?
Pillar 1
Hardiness Zones
Hardiness refers to a plant's ability to survive the regional winter minimum temperatures. In the Puget Sound Lowlands, our coastal proximity and "Rain Shadow" effects create unique microclimates that determine which ornamentals can remain in the ground year-round.
Researcher's Note: Click "Next" after exploring all three pillars to view the specific temperature charts and zone maps for our research area.
Ground
Climate & Soil Mastery
Identify the specific Puget Sound hardiness zones (8a-9a) to determine plant survivability.
Analyze the impact of Glacial Till on garden drainage and nutrient retention.
Create a structure for viable growth in the Puget Sound.
Zone Two: The Drainage Gap
The Perched Water Table
Researcher's Note:
This middle "transition" zone is where the drainage paradox happens. Because the bottom layer is impermeable, water doesn't drain down—it sits here or moves sideways along the slope of your yard.
Gardener's Action:
If you dig a hole and it stays filled with water for hours, your "perched" table is too high. You’ll need to plant in raised beds or mounds to keep sensitive specimens like lavender or dahlias from rotting.
Researcher's insight
Hiding in Plain Sight
Female Goldenrod Spiders can change colors to camouflage itself on flowers for ambusing prey and avoiding predators.
FUN FACT
They commonly change between yellow and white; therefore are often found on flowers such as white daisies and goldenrod.
The Puget Sound Paradox
The Maritime Buffer
The Puget Sound’s thermal mass keeps air temperatures between 45°F and 50°F, preventing deep-soil freezing. This allows "tender" perennials to survive winter but does not provide the heat needed for summer growth.
Zone one: The Organize Buffer
The Breathable Layer
Researcher's Note:
This top 2-6 inches of soil is where your active biology lives. In the Puget Sound, this layer is often highly acidic and lean due to our heavy rainfall.
Gardener's Action:
This is the only zone where you can easily change the soil structure. Focus your Pillar 3: Amendments here to keep roots from suffocating against the dense material below.
Examine
Regional Ecosystems, Plant Anatomy & Plant Tags
Analyze regional ecosystems that affect plant survival.
Understand structural adaptations for plant resilience.
Interpret technical data from seed, bulb, and tuber packets to establish localized planting depth and timing.
Zone three: glacial till
The Vashon Hardpan
Researcher's Note:
You’ve reached the "concrete". This is Glacial Till—rock, clay, and silt compressed by the weight of a mile-thick glacier 15,000 years ago. It is nearly impermeable to water and extremely difficult for roots to penetrate.
Gardener's Action:
Do not try to dig through this. Instead, acknowledge this as your "bottom floor" and build your garden up with organic matter to create a healthy root environment.
Card 1: Overcoming Glacial Till
The Problem: Your Bothell field site sits on a thick layer of hard, compacted Vashon Glacial Till that water cannot easily penetrate.
The Question: Based on the soil amendment lessons in Section 2, how should you build a healthy planting bed over this hardpan till?
Region 1
The Rain Shadow
Northern Sound/Whidbey
The towering Olympic Mountains block incoming Pacific storms, creating an unexpectedly dry zone across the northern waters
The Impact
Areas like Sequim or Whidbey Island receive a fraction of the region's typical rainfall, meaning gardeners here must focus heavily on intentional irrigation planning.
Microclimate Note
This zone often experiences higher overall light levels alongside cooler, shifting maritime winds.
Layer 1
The Suppressor
Lay cardboard/newspaper directly on grass/weeds. This suppresses weeds and break down into carbon.
Researcher's Insight:
Make sure all inorganic components such as packing tape are removed.
What is glacial till composed of?
Hardware
Optimized for tablet or desktop viewing (minimum 1024 x 768).
Connectivity
A stable internet connection is required to load high-resolution botanical specimens.
Browser
Use the latest version of Chrome, Edge, or Safari for smooth interactions.
Audio
Enable sound to hear environmental cues and researcher audio logs
Region 2
Maritime Moderation
The Sound Core
Living close to the Puget Sound acts as a natural thermostat, keeping winters milder and summers cooler than areas further inland.
The Impact
This water boundary creates reliable hardiness zones (8b–9a), delaying the first autumn frost and offering a longer overall growing season.
Garden Planning
Perfect for maximizing mid-season crops, though early spring planting can be delayed by cool, damp soil temperatures.
Plant Anatomy
The Master Recyclers
Anatomical Adaptation
Local plants have built-in features that help them survive wet winters and dry summers
Deep Roots
Grow down deep to find nutrients and water trapped beneath hard, compacted clay and glacial soils.
Waxy Leaves
Thick, waxy leaf surfaces help the plant hold onto moisture and prevent water loss during hot, dry spells.
This video from the Clackmas River Council discusses how plants adapt to different climates and how to choose native plants that thrive in specific climates.
Soil Benefit
These unique structures help native plants channel water efficiently and keep garden soil stable.
Plant Packs
Deciphering Tag Data
Nursery Plant Packs
Learning to read nursery plant tags is a vital step for a successful backyard garden.
Shared Needs
Garden centers group starter plants by what they need to thrive—like sun exposure, soil drainage, and winter cold.
Tag Details
Checking these facts helps you place plants in the right spot, preventing them from dying early.
Garden Planning
Knowing this data makes it easy to choose varieties that naturally match your overall garden layout.
Researcher's Insight
The Nutrient Architect
Salmon act as a biological bridge between the Sky (water/precipitation) and Earth (soil), transporting essential oceanic nutrients into the "Three Pillars" of the PNW ground.
FUN FACT
Nitrogen from salmon remains has been detected in trees up to 500 feet away from riverbanks, acting like a high-end "salon treatment" for the forest floor.
Layer 2
The Nutrients
Add green waste or compost to provide immediate nutrients.
Researcher's Insight:
While fertilizer provides nutrients directly to the plant, compost adds nutrients to the soil.
Regional Ecosystems
The Plant Community
Ecosystem Dynamics:
Maritime PNW plant communities form specialized networks uniquely adapted to heavy rainfall and acidic soils
Zone Thresholds
Species interact dynamically within hardiness zones 8a–9a to balance light access beneath dense evergreen overstories.
Gardener's Application
Mapping these natural guilds allows designers to select companion plants that naturally optimize nutrient cycling.
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Transcript
Begin
Lead Researcher's Log: The Puget Sound
Ground
Welcome, Researcher.
You are standing at the threshold of a complex and beautiful ecosystem: The Puget Sound.
Examine
This journal is your primary tool for navigating the maritime microclimates and unique glacial soils of the Pacific Northwest.
As you move through these pages, you will gather the data needed to build a resilient, sustainable garden that thrives in our specific lowland environment.
Map
The tools are laid out, the map is pinned, and the field study is officially open.
Apply
Let's begin.
Next
Back
Begin
Field Manual Navigation
To complete this study, navigate through the research phases using the index to your right. The hummingbird indicates the current phase.
Ground
This Field Journal and Guide covers the following topics divided into research phases:
Ecosystems, Adaptations, and Tag Data
Orientation and Project Goals
Soil & Climate Foundation
Regional Microclimates
Final Field Test
Examine
Look for the blinking blue buttons for interactions and researcher's insights!
Hover over and click images to open informational windows.
Interact with the floral icons to the right to return to the desired research phase.
Map
Apply
Next
Back
Begin
Researcher's Technical Kit
Ground
Before heading into the field, ensure your equipment is calibrated for the best interactive experience:
Connectivity
Hardware
Browser
Examine
Audio
Interactivity
Map
Apply
Click each icon for more information
Next
Back
08/24/2019
Begin
Researcher’s Checklist: Criteria for Mastery
Ground
Complete the following observations to certify your field journal.
Ground
Examine
You got this, Lead Researcher!
Examine
05/12/1985
Apply
03/30/2011
Map
Map
06/29/2023
Apply
Next
Back
Begin
The Three Pillars of the PNW Ground
Ground
Regional Scope & Environmental Context
To garden effectively in the Pacific Northwest, we must first define our research site. The Puget Sound Lowlands consist of the glaciated trough sitting between the Cascade Range and the Olympic Mountains. Our study focuses on the "Urban Corridor" counties, where shared geological history dictates our success:
Our field research will prioritize Three Pillars of Cultivation:
Examine
Hardiness
Map
Glacial Till
Soil Health
Click on the soil profiles to investigate the Three Pillars
Apply
Next
Back
Begin
Pillar 1: Hardiness Zones
In the Puget Sound Lowlands, our research focuses on USDA Hardiness Zones 8a, 8b, and 9a. These classifications are based on the average annual minimum winter temperature, which dictates whether a perennial can survive in the ground year-round.
Ground
Hover over the counties to see their specific Hardiness Zones
Examine
The Puget Sound Paradox
Snohomish County
Kitsap County
Map
King County
Growing Degree Days (GDD)
The Maritime Buffer
Thurston County
Pierce County
Hardiness zones indicate if a plant will live; GDD indicates if it will flourish.
Apply
Next
Back
Begin
Pillar 2: Glacial Till
The Mechanical Constraint
Ground
In the Puget Sound Lowlands, our research must account for the geological footprint of the Vashon Glacier. Approximately 14,000 years ago, as the ice receded, it deposited Glacial Till: a dense, unsorted mixture of clay, silt, sand, and gravel.
Examine
Under the immense weight of the ice, this material was compressed into Hardpan—a nearly impenetrable, concrete-like layer.
Map
This creates a primary challenge for local cultivation: poor infiltration, where water pools on top of the soil rather than soaking through to the roots.
Apply
Click the markers in the soil profile to excavate each layer's secrets.
Next
Back
Begin
Pillar 3: Soil Health
Building the Floor
Ground
The Why: Working with the Barrier
In traditional gardening, people are told to "dig a hole twice as wide as the root ball." In the Puget Sound Lowlands, that advice often leads to a "Bathtub Effect" where the hole holds water against the hardpan and drowns the plant.
Examine
Map
A "sponge" for dry Augusts that provides essential drainage during wet Decembers.
The Soil Sponge
We can’t change Vashon Till structure, only the environment on top.
The Mechanical Constraint
Stacked organic layers invite worms and fungi to aerate the tough upper till for you.
The Biological Engine
Apply
Next
Back
1. Click the icons for further explanation.
2. Click the interactive button to build the layers.
Begin
Pillar 3: Soil Amendments
Lasagna Gardening
Ground
We can use the "Lasagna Method" by building atop existing soil. This technique allows use to create our own biological engine without having to dig and make soil amendments in the ground.
Examine
Layer 1: The Base
The Weed Barrier
Map
Layer 2: The Nutrients
The Energy
Layer 3: The Blanket
The Armor
Apply
Note: These are the basic foundational layers; for an example of more complex lasagna garden layering click on the interactive button here.
Next
Back
Click on each image to check your knowledge
Begin
Check Your Notes
Knowledge Check
Ground
Examine
Map
Apply
Next
Back
Begin
Examine the Field & Specimens
Uncovering Regional Systems, Structural Adaptations, and Tag Data
Ground
Understanding regional Puget Sound ecosystems, plant anatomy, and how to read plant tags is vital for a successful garden, as this knowledge ensures you select appropriate species for the local climate and place them in environmental conditions where they can thrive.
Examine
Plant Anatomy
Regional Ecosystems
Plant Packs
Map
Apply
Next
Back
Click on each image to check your knowledge
Begin
Check Your Notes
Knowledge Check
Ground
Examine
Map
Apply
Next
Back
Begin
Mapping Regional Microclimates
Regional Geography, Maritime Patterns, and Growing Cycles
Ground
The Rain Shadow
Examine
Maritime Moderation
Elevation & Air Drainage
Map
Apply
Next
Back
Begin
Check Your Notes
Knowledge Check
Ground
When mapping out your spring planting schedule for sensitive tubers like Dahlias in the Pacific Northwest, which calendar window is the safest choice to avoid crop-killing frost?"
Examine
Map
Apply
Next
Back
Begin
Field Application
Putting Regional Systems and Data Into Practice
Ground
As a Pacific Northwest grower, success relies on synthesizing soil health, local climate patterns, and seed data simultaneously. Below are three scenarios that often occur in the PNW. Click each card to view the scenario and provide a solution.
Examine
Map
Apply
Next
Back
Begin
Ground
Congratulations, Researcher!
You have successfully mapped the geographical microclimates, braved the "Northwest Concrete" of the Vashon glacial till, and mastered the organic layers of the Lasagna gardening method.
Examine
Your field guide is complete, and your home plot is ready to thrive.
Map
Best of luck out there!
Apply
Next
Back
Begin
Academic References & Citations
I. Geological, Climatic, & Soil Mechanics Data
Ground
Dunagan, C. (2015, September 18). Puget Sound: A uniquely diverse and productive estuary. Encyclopedia of Puget Sound. Tiny Garden Habit. (2026). Infographic showing lasagna garden layers with labeled layers. Facebook.com. Retrieved May 8, 2026, from https://www.facebook.com/photo/?fbid=122186059088763155&set=a.122105387054763155. USDA Agricultural Research Service. (2023). USDA Plant Hardiness Zone Map. US Department of Agriculture. Retrieved May 5, 2026, from https://planthardiness.ars.usda.gov/. Warren County Master Gardeners. (n.d.). Lasagna gardening. Cornell Cooperative Extension of Warren County. Retrieved May 31, 2026, from https://warren.cce.cornell.edu/gardening-landscape/warren-county-master-gardener-articles/lasagna-gardening. Washington Geological Survey. (n.d.). Puget Sound and coastal geology. Washington State Department of Natural Resources. Retrieved May 31, 2026, from https://dnr.wa.gov/washington-geological-survey/explore-popular-geology/puget-sound-and-coastal-geology.
Examine
Map
Apply
Next
Back
Begin
Academic References & Citations
II. Botanical, Species Profile, & Ecological Data
American Horticultural Society. (2022). The encyclopedia of garden plants. DK Publishing. CK-12 Foundation. (2020, June 17). Plant adaptations. LibreTexts. https://bio.libretexts.org/Bookshelves/Introductory_and_General_Biology/Introductory_Biology_(CK-12)/09%3A_Plants/9.23%3A_Plant_Adaptations. Dahlia PAINTER(TM) PINK KISSES. (n.d.). macore.com. Retrieved May 5, 2026, from https://macore.com/categories/lister/34/6/43. FISHBIO. (2021, July 12). Stinky salmon, natural fertilizers. Fishbio.com. Retrieved May 31, 2026, from https://fishbio.com/stinky-salmon-natural-fertilizers/. Garden Design Magazine. (n.d.). Annuals vs. perennials. GardenDesign.com. Retrieved May 31, 2026, from https://www.gardendesign.com/annuals/vs-perennials.html. Hoffman Nursery. (2016, November 28). Sedges' quiet strength. Hoffmannursery.com. https://hoffmannursery.com/blog/article/sedges-quiet-strength. How to read a plant tag. (2017). Young’s Plant Farm. Retrieved May 5, 2026, from https://youngsplantfarm.com/read-plant-tag/. National Audubon Society. (2026). Field guide to North American birds: Western region. U.S. Forest Service. (n.d.). About the area. U.S. Department of Agriculture. Retrieved May 31, 2026, from https://www.fs.usda.gov/r06/about-area. UNC Charlotte Urban Institute. (n.d.). Same spider, different color. University of North Carolina at Charlotte. Retrieved May 31, 2026, from https://ui.charlotte.edu/story/spider-different-color/.
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Academic References & Citations
III. Instructional Design Frameworks
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Anderson, L. W., & Krathwohl, D. R. (Eds.). (2001). A taxonomy for learning, teaching, and assessing: A revision of Bloom's taxonomy of educational objectives. Longman. Cast. (2018). Universal Design for Learning Guidelines version 2.2. http://udlguidelines.cast.org Gagne, R. M., Wager, W. W., Golas, K. C., & Keller, J. M. (2005). Principles of instructional design (5th ed.). Wadsworth/Thomson Learning.
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What anatomical adaptations do local plants have to help them survive in the PNW?
The Puget Sound Paradox
Growing Degree Days (GDD)
GDD measures cumulative heat over time. While we are in a high hardiness zone, our cool nights mean we often lack the sustained heat required for specimens like dahlias to bloom or ripen fully.
Layer 3
The Protector
Cover area with mulch to protect the soil from heavy PNW rain and leaching
Researcher's Insight:
Wood chips and bark offer superior longevity and drainage, acting as a durable "blanket" for PNW garden beds.
Researcher's insight
Genetic vs. Conditional Longevity
While a plant's baseline status as an annual or perennial is hardcoded into its genetics, the environment plays a massive role in how that longevity actually manifests in the field.
Gardener's Notes
Be sure to note the hardiness zones listed on the plant tag to determine whether the plant will be an annual or perennial.
Card 2: Bothell Planting Windows
The Problem: You are scheduling a planting calendar for Dahlias in Snohomish County Hardiness Zone (8b), where spring rains keep the ground cold and wet for months.
The Question: To protect the tubers from rotting in damp soil, what is the critical baseline requirement before planting them outside?
Specimen Study
The Dahlia
While dahlias are hardy in Zone 8, they are the primary victims of the "Puget Sound Paradox". They survive the winter but often lack the summer "heat units" to reach full bloom. They are considered "tender perennials."
FUN FACT
In your Puget Sound garden, starting dahlias indoors in April effectively "cheats" the Paradox by adding 30 days to their Growing Degree Day count.
Which of these pieces of cardboard can be used as the base layer atop existing structure?
Apply
Field Test
Solve site-specific gardening challenges.
Apply and adapt gardening methods and strategies for practice use.
Validate field observations using the Researcher’s Log bibliography and local PNW resources.
Card 3: Utilizing Native Plants
The Problem: A low-lying section of the yard collects heavy rain runoff from the roof line all winter long, leaving the soil completely saturated.
The Question: Applying the regional ecosystem principles from Section 3, which approach best utilizes native plant anatomy to manage this seasonal water?
Region 3
Elevation & Air Drainage
The Foothills
As you move away from the water and toward the Cascade foothills, cold mountain air flows downward and pools in low-lying river valleys.
The Impact
These inland areas experience significantly colder winter lows and unexpected late-spring frosts that can catch growers off guard.
Garden Planning
Shifting to cold-hardy crops and utilizing protective structures like cloches or cold frames is essential for early-season success.
Researcher's Insight
The "SUV" of Nests
Bald Eagles in the Puget Sound are master engineers, building the largest nests in North America along our shorelines.
FUN FACT
By adding new material every year, their nests can reach 10 feet wide and weigh up to two tons—the same as a small SUV!
Build your "lasagna" starting with the top most layer at the top.
What is NOT included on a plant tag?
Interactivity
This journal is touch and click-responsive. Look for the Interactive' pulse icons
Researcher's insight
The Wetland Filter
Native rushes and sedges act as nature's filtration system in the Puget Sound basin.
FUN FACT
Their dense root networks are incredibly efficient at capturing runoff and filtering out urban pollutants before the water can reach local salmon streams!
Pillar 2
Glacial Till
Beneath the surface lies Glacial Till, often called "Seattle Cement." This is a highly compacted, unsorted mix of clay, sand, and rock left behind by the Vashon Glaciation 15,000 years ago.
Researcher's Note: Understanding this compaction is vital for determining where to plant moisture-sensitive specimens.
map
Regional Microclimates
Navigate the Puget Sound Lowlands Map to pinpoint microclimates across the diverse lowland counties.
Identify regional geographic demographics and their impact on plant viability.
Adapt gardening strategies to address geographic constraints.
Pillar 3
Soil Health
This represents the biological foundation of the garden. Successful PNW cultivation requires transitioning from native till to living soil through the heavy use of organic amendments.
Researcher's Note:We will explore how to bypass native drainage issues using raised beds and strategic soil building in the final phase.
Researcher's Insight
The "Hard Drive" Brain
Black-capped Chickadees in the Puget Sound are master memory keepers.
FUN FACT
To remember thousands of hidden seed locations, their hippocampus grows by 30% every autumn—essentially expanding their "internal hard drive" for the winter!
What information is commonly found on plant tags?
Pillar 1
Hardiness Zones
Hardiness refers to a plant's ability to survive the regional winter minimum temperatures. In the Puget Sound Lowlands, our coastal proximity and "Rain Shadow" effects create unique microclimates that determine which ornamentals can remain in the ground year-round.
Researcher's Note: Click "Next" after exploring all three pillars to view the specific temperature charts and zone maps for our research area.
Ground
Climate & Soil Mastery
Identify the specific Puget Sound hardiness zones (8a-9a) to determine plant survivability.
Analyze the impact of Glacial Till on garden drainage and nutrient retention.
Create a structure for viable growth in the Puget Sound.
Zone Two: The Drainage Gap
The Perched Water Table
Researcher's Note:
This middle "transition" zone is where the drainage paradox happens. Because the bottom layer is impermeable, water doesn't drain down—it sits here or moves sideways along the slope of your yard.
Gardener's Action:
If you dig a hole and it stays filled with water for hours, your "perched" table is too high. You’ll need to plant in raised beds or mounds to keep sensitive specimens like lavender or dahlias from rotting.
Researcher's insight
Hiding in Plain Sight
Female Goldenrod Spiders can change colors to camouflage itself on flowers for ambusing prey and avoiding predators.
FUN FACT
They commonly change between yellow and white; therefore are often found on flowers such as white daisies and goldenrod.
The Puget Sound Paradox
The Maritime Buffer
The Puget Sound’s thermal mass keeps air temperatures between 45°F and 50°F, preventing deep-soil freezing. This allows "tender" perennials to survive winter but does not provide the heat needed for summer growth.
Zone one: The Organize Buffer
The Breathable Layer
Researcher's Note:
This top 2-6 inches of soil is where your active biology lives. In the Puget Sound, this layer is often highly acidic and lean due to our heavy rainfall.
Gardener's Action:
This is the only zone where you can easily change the soil structure. Focus your Pillar 3: Amendments here to keep roots from suffocating against the dense material below.
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Regional Ecosystems, Plant Anatomy & Plant Tags
Analyze regional ecosystems that affect plant survival.
Understand structural adaptations for plant resilience.
Interpret technical data from seed, bulb, and tuber packets to establish localized planting depth and timing.
Zone three: glacial till
The Vashon Hardpan
Researcher's Note:
You’ve reached the "concrete". This is Glacial Till—rock, clay, and silt compressed by the weight of a mile-thick glacier 15,000 years ago. It is nearly impermeable to water and extremely difficult for roots to penetrate.
Gardener's Action:
Do not try to dig through this. Instead, acknowledge this as your "bottom floor" and build your garden up with organic matter to create a healthy root environment.
Card 1: Overcoming Glacial Till
The Problem: Your Bothell field site sits on a thick layer of hard, compacted Vashon Glacial Till that water cannot easily penetrate.
The Question: Based on the soil amendment lessons in Section 2, how should you build a healthy planting bed over this hardpan till?
Region 1
The Rain Shadow
Northern Sound/Whidbey
The towering Olympic Mountains block incoming Pacific storms, creating an unexpectedly dry zone across the northern waters
The Impact
Areas like Sequim or Whidbey Island receive a fraction of the region's typical rainfall, meaning gardeners here must focus heavily on intentional irrigation planning.
Microclimate Note
This zone often experiences higher overall light levels alongside cooler, shifting maritime winds.
Layer 1
The Suppressor
Lay cardboard/newspaper directly on grass/weeds. This suppresses weeds and break down into carbon.
Researcher's Insight:
Make sure all inorganic components such as packing tape are removed.
What is glacial till composed of?
Hardware
Optimized for tablet or desktop viewing (minimum 1024 x 768).
Connectivity
A stable internet connection is required to load high-resolution botanical specimens.
Browser
Use the latest version of Chrome, Edge, or Safari for smooth interactions.
Audio
Enable sound to hear environmental cues and researcher audio logs
Region 2
Maritime Moderation
The Sound Core
Living close to the Puget Sound acts as a natural thermostat, keeping winters milder and summers cooler than areas further inland.
The Impact
This water boundary creates reliable hardiness zones (8b–9a), delaying the first autumn frost and offering a longer overall growing season.
Garden Planning
Perfect for maximizing mid-season crops, though early spring planting can be delayed by cool, damp soil temperatures.
Plant Anatomy
The Master Recyclers
Anatomical Adaptation
Local plants have built-in features that help them survive wet winters and dry summers
Deep Roots
Grow down deep to find nutrients and water trapped beneath hard, compacted clay and glacial soils.
Waxy Leaves
Thick, waxy leaf surfaces help the plant hold onto moisture and prevent water loss during hot, dry spells.
This video from the Clackmas River Council discusses how plants adapt to different climates and how to choose native plants that thrive in specific climates.
Soil Benefit
These unique structures help native plants channel water efficiently and keep garden soil stable.
Plant Packs
Deciphering Tag Data
Nursery Plant Packs
Learning to read nursery plant tags is a vital step for a successful backyard garden.
Shared Needs
Garden centers group starter plants by what they need to thrive—like sun exposure, soil drainage, and winter cold.
Tag Details
Checking these facts helps you place plants in the right spot, preventing them from dying early.
Garden Planning
Knowing this data makes it easy to choose varieties that naturally match your overall garden layout.
Researcher's Insight
The Nutrient Architect
Salmon act as a biological bridge between the Sky (water/precipitation) and Earth (soil), transporting essential oceanic nutrients into the "Three Pillars" of the PNW ground.
FUN FACT
Nitrogen from salmon remains has been detected in trees up to 500 feet away from riverbanks, acting like a high-end "salon treatment" for the forest floor.
Layer 2
The Nutrients
Add green waste or compost to provide immediate nutrients.
Researcher's Insight:
While fertilizer provides nutrients directly to the plant, compost adds nutrients to the soil.
Regional Ecosystems
The Plant Community
Ecosystem Dynamics:
Maritime PNW plant communities form specialized networks uniquely adapted to heavy rainfall and acidic soils
Zone Thresholds
Species interact dynamically within hardiness zones 8a–9a to balance light access beneath dense evergreen overstories.
Gardener's Application
Mapping these natural guilds allows designers to select companion plants that naturally optimize nutrient cycling.