Your complete guide to spring vegetable gardening in Western Washington, from preparing healthy soil and starting seeds to planting, protecting crops, and planning for a successful harvest.
By David Thompson
Founder/Director, Urban Harvest Exchange
WSU Pierce County Master Gardener
Spring is one of my favorite times of year. After months of rain, cold temperatures, and short days, the garden begins waking up. The soil starts warming, earthworms become more active, buds appear on fruit trees, and the first seedlings push through the soil.
For gardeners in the Pacific Northwest, spring is a season of opportunity, but it also requires patience.
One of the biggest mistakes gardeners make is assuming that a few sunny days in March mean it's time to plant everything.
Here in Western Washington, our spring weather can be unpredictable. We can experience warm sunshine one week, heavy rain the next, and occasional frost well into the season.
Successful spring gardening isn't about planting everything as early as possible. It's about understanding our climate, preparing healthy soil, choosing the right crops, and planting at the right time.
At Urban Harvest Exchange, spring is an especially busy season. We're starting thousands of seeds, preparing garden beds, maintaining our growing spaces, and getting ready to produce fresh food for our community.
With Tacoma Urban Farm expanding to 42 raised beds for spring 2027, we're looking forward to growing even more vegetables to share with our neighbors.
Whether you're planting your first container of lettuce or managing a large vegetable garden, the principles are the same.
A productive garden begins with good planning and healthy soil.
Understanding Spring Weather in Western Washington
The Pacific Northwest has a maritime climate, which gives us relatively mild winters and cool, often wet springs.
In the Tacoma and Pierce County area, gardeners commonly experience:
Frequent rainfall during early spring.
Cool soil temperatures.
Occasional late frosts.
Short periods of warm weather followed by cold conditions.
Increasing daylight as spring progresses.
A gradual transition toward drier weather in late spring and summer.
Our biggest challenge is often not air temperature but soil temperature and moisture.
A warm afternoon doesn't necessarily mean the soil is ready for planting.
Cold, saturated soil can slow germination, encourage seed rot, and damage young roots.
Don't Work Wet Soil
One of the most important rules of spring gardening is to avoid digging or working soil when it's too wet.
Working saturated soil can destroy soil structure, cause compaction, and reduce the air spaces that roots and soil organisms need.
The Squeeze Test
Take a handful of soil from your garden.
Squeeze it gently.
If water drips out or the soil forms a sticky, dense ball that won't break apart, it's too wet to work.
If it forms a loose ball that crumbles when gently pressed, conditions may be suitable.
Wait until the soil is workable before preparing beds.
Your patience will pay off throughout the growing season.
Start With Healthy Soil
Healthy soil is the foundation of a productive garden.
It's more than just dirt. Soil is a living ecosystem containing minerals, organic matter, microorganisms, fungi, insects, and countless other organisms.
These organisms help cycle nutrients, break down organic materials, and support healthy plant growth.
Test Your Soil
Before adding fertilizers or large amounts of compost, consider having your soil tested.
A soil test can help identify:
Soil pH.
Nutrient levels.
Organic matter.
Potential nutrient deficiencies or excesses.
Appropriate fertilizer recommendations.
Most vegetables grow well in slightly acidic to near-neutral soil, often around pH 6.0–7.0, although individual crops have different preferences.
Here in Western Washington, soils can be naturally acidic, but don't automatically add lime without testing.
Too much lime can raise soil pH beyond the ideal range and interfere with nutrient availability.
Add Compost When Needed
Finished compost can improve soil structure, support soil organisms, and provide nutrients.
Spread an appropriate amount over the soil surface and incorporate lightly if necessary.
Avoid excessive applications, especially of manure-based compost, which can contribute to phosphorus buildup.
At Urban Harvest Exchange, compost is an important part of maintaining our raised beds and community gardens.
Avoid Excessive Tilling
Repeated tilling can disrupt soil structure, damage fungal networks, accelerate organic matter decomposition, and increase erosion risks.
Whenever practical, use minimal soil disturbance.
Rather than turning over the entire garden every spring, consider loosening compacted areas only where needed and maintaining permanent growing beds.
Keep Soil Covered
Bare soil is vulnerable to erosion, compaction, and moisture loss.
Mulch, cover crops, and living plants help protect the soil.
As spring progresses, organic mulch can also help conserve moisture before our typically drier summer weather arrives.
What Vegetables Can You Plant in Early Spring?
One of the great advantages of gardening in Western Washington is that many vegetables grow best during cool weather.
These crops can often be planted well before tomatoes, peppers, and squash.
Cool-Season Vegetables
Peas
Peas are one of my favorite early spring crops.
They thrive in cool conditions and can often be direct-sown in late winter or early spring when the soil is workable.
Snow peas, snap peas, and shelling peas are all excellent choices.
Provide a trellis for climbing varieties.
Peas also belong to the legume family and form relationships with bacteria that can fix atmospheric nitrogen under suitable conditions.
Lettuce
Lettuce performs especially well during our cool spring weather.
Plant small amounts every couple of weeks for a continuous harvest.
Leaf lettuce is particularly useful because you can harvest outer leaves while allowing the plant to continue growing.
Spinach
Spinach grows well in cool weather and can be planted early.
It often bolts as days lengthen and temperatures rise, so spring is an excellent time to grow it.
Radishes
Radishes are one of the fastest vegetables to mature.
Some varieties can be ready to harvest in approximately three to five weeks under favorable conditions.
They're ideal for beginning gardeners and children.
Carrots
Carrots prefer direct sowing because their developing taproots don't transplant well.
They germinate best in fine, consistently moist soil.
Early spring germination may be slow when soil temperatures remain cool.
Beets
Beets provide both edible roots and nutritious greens.
They tolerate cool weather and are excellent for spring planting.
Broccoli
Broccoli performs well during cool spring conditions.
Start seeds indoors or purchase healthy transplants.
Provide adequate spacing and monitor for cabbage worms and other pests.
Cabbage
Cabbage is another excellent spring crop.
Choose varieties suited to the season and protect young plants from pests.
Kale
Kale is one of the most reliable vegetables for Western Washington gardens.
It tolerates cool weather and can produce over an extended period.
Potatoes
Seed potatoes can be planted when soil conditions are suitable.
Use certified disease-free seed potatoes whenever possible.
Avoid planting into cold, saturated soil.
Spring Vegetable Planting Calendar for Tacoma
The following calendar provides general guidance for the Tacoma and Pierce County area.
Actual planting dates depend on weather, soil temperature, elevation, and the conditions in your garden.
MonthWhat to plant or doFebruaryStart onions, leeks, broccoli, cabbage, and cauliflower indoors; direct-sow peas when soil permitsMarchPlant peas, spinach, radishes, lettuce, carrots, and hardy greens; transplant suitable brassicasAprilContinue cool-season planting; sow beets, carrots, chard, and lettuce; start squash indoors late in the monthMayContinue succession planting; begin transplanting tomatoes when soil and weather are warm enoughLate May–JunePlant peppers, eggplant, basil, beans, cucumbers, squash, and other warm-season crops when conditions are suitable
These are guidelines, not guarantees.
A sheltered urban garden may warm sooner than an exposed garden in a rural or higher-elevation location.
Soil temperature is often a better planting guide than the calendar.
Understanding Soil Temperature
Different vegetables require different soil temperatures for successful germination and growth.
CropApproximate minimum germination temperatureMore favorable rangePeas40°F50–70°FLettuce35°F55–70°FSpinach35°F45–65°FCarrots40°F55–75°FBeets40°F55–75°FBeans60°F70–85°FCorn50°F65–85°FCucumbers60°F70–90°FSquash60°F70–90°F
These are approximate values. Germination requirements vary by variety, and minimum germination temperatures don't necessarily indicate good planting conditions.
A simple soil thermometer can help gardeners make better decisions.
For example, bean seeds planted into cold, wet soil may rot before germinating.
Waiting another week or two can sometimes produce a healthier and more productive crop.
Starting Seeds Indoors for Spring
Starting seeds indoors allows gardeners to get a head start on the growing season.
This is particularly important for heat-loving crops that need a longer period of warm weather to mature.
Good Crops to Start Indoors
Tomatoes.
Peppers.
Eggplant.
Broccoli.
Cabbage.
Cauliflower.
Onions.
Leeks.
Many herbs and flowers.
Basic Seed-Starting Supplies
You'll need:
Clean containers with drainage holes.
Quality seed-starting mix.
Seeds.
Water.
Adequate lighting.
Suitable temperatures.
Labels.
Heat mats can be helpful for germinating peppers, tomatoes, and other warm-season crops.
However, once seedlings emerge, strong light becomes essential.
Avoid Leggy Seedlings
One of the most common problems with indoor seed starting is inadequate light.
Seedlings stretch toward the light, becoming tall, thin, and weak.
Grow lights can help produce compact, healthy plants.
For many seedlings, approximately 14–16 hours of light daily is a useful starting point.
Keep the lights at the appropriate distance according to the manufacturer's instructions.
Don't Start Too Early
Starting tomatoes in January may sound productive, but unless you have adequate space, light, and temperature control, you may end up with oversized plants before it's safe to transplant them.
For most home gardeners in Western Washington, starting tomatoes approximately six to eight weeks before the intended transplant date works well.
Peppers often benefit from eight to ten weeks indoors.
Hardening Off: Preparing Plants for the Outdoors
Indoor-grown seedlings aren't ready to move directly into the garden.
They need time to adjust to sunlight, wind, and fluctuating temperatures.
This process is called hardening off.
Begin by placing seedlings outdoors in a sheltered, shaded location for a few hours.
Over approximately seven to ten days, gradually increase their exposure to sunlight and outdoor conditions.
Bring them indoors or provide protection during damaging cold, strong winds, or other severe weather.
Remember that hardening off doesn't make frost-sensitive plants frost-tolerant.
Tomatoes, peppers, cucumbers, squash, and basil should not be exposed to freezing temperatures.
Raised Bed Gardening in Spring
Raised beds offer several advantages in our Pacific Northwest climate.
They can provide improved drainage, easier soil management, and more accessible growing areas.
At Tacoma Urban Farm, we're expanding to 42 raised beds for spring 2027.
Our raised beds allow us to grow vegetables efficiently while making gardening more accessible to volunteers and community members.
Preparing Raised Beds for Planting
Remove weeds and debris.
Inspect the bed for damage.
Check soil moisture and drainage.
Add compost or other amendments as needed.
Loosen compacted areas without unnecessarily disturbing the entire bed.
Level the growing surface.
Install irrigation before planting whenever possible.
Plant according to crop spacing requirements.
Mulch when appropriate.
Avoid walking on the soil inside raised beds.
Compaction reduces air spaces and makes it more difficult for roots to grow.
Protecting Spring Crops From Frost and Pests
Spring weather can change quickly in Western Washington.
Even when daytime temperatures are pleasant, nighttime temperatures may drop enough to damage tender plants.
Floating Row Covers
Floating row cover is a lightweight fabric that can provide modest protection from frost, wind, and certain insect pests.
Install it over hoops or directly over appropriate crops, securing the edges.
For insect exclusion, install covers before pests arrive and seal the edges.
Remove or manage covers when crops require insect pollination.
Low Tunnels
Low tunnels can provide additional protection and help extend the growing season.
They may be covered with row cover or plastic.
Plastic tunnels require careful ventilation because temperatures can rise rapidly on sunny days.
Watch for Slugs
Slugs are especially active during our cool, wet spring weather.
They can cause significant damage to young seedlings.
Check plants regularly and use integrated pest management techniques.
Good sanitation, habitat management, trapping, and other appropriate controls can help reduce damage.
Planning Your Garden for Maximum Production
A productive garden isn't simply about planting as many vegetables as possible.
It's about using available space efficiently and planning harvests throughout the growing season.
Succession Planting
Succession planting means planting crops at different times to extend the harvest.
For example, instead of planting all your lettuce at once, sow a small amount every two weeks.
This provides a more consistent supply of fresh greens.
Interplanting
Interplanting involves growing compatible crops together.
Fast-growing radishes can sometimes be planted between slower-growing vegetables and harvested before the larger plants need the space.
Be careful not to overcrowd plants or create excessive competition for water, nutrients, and sunlight.
Vertical Gardening
Trellises help make better use of limited space.
Peas, pole beans, cucumbers, and some squash varieties can be trained vertically.
Vertical growing can improve airflow, simplify harvesting, and reduce contact between produce and wet soil.
Crop Rotation
Rotating crops can help manage certain pests and diseases.
Avoid repeatedly growing closely related vegetables in the same location when practical.
For example, tomatoes, peppers, eggplant, and potatoes belong to the nightshade family.
Broccoli, cabbage, kale, and cauliflower belong to the brassica family.
In small gardens, crop rotation alone may not prevent disease, so combine it with healthy soil practices, sanitation, and resistant varieties.
Watering and Irrigation
Western Washington gardeners sometimes assume spring rainfall provides all the water their gardens need.
But raised beds, containers, and newly transplanted seedlings can dry out faster than expected.
As spring transitions into summer, rainfall generally decreases.
Water Deeply and Appropriately
Water according to soil moisture, plant needs, and weather conditions rather than following a rigid daily schedule.
Deep watering encourages roots to explore the soil, although young seedlings initially need more frequent moisture near the surface.
Avoid keeping soil constantly saturated.
Drip Irrigation
Drip irrigation is one of the most efficient ways to water vegetable gardens.
It delivers water directly to the root zone, reducing evaporation and minimizing leaf wetness.
At Tacoma Urban Farm, installing additional automatic irrigation is one of our priorities as we expand our growing areas.
Automated irrigation can save valuable volunteer time and help maintain consistent moisture throughout the growing season.
Supporting Pollinators and Beneficial Insects
A productive garden depends on more than vegetables.
Pollinators and beneficial insects play important roles in maintaining a healthy garden ecosystem.
Consider planting flowers and herbs that provide nectar, pollen, and habitat.
Good options may include:
Calendula.
Alyssum.
Borage.
Native flowering plants.
Dill.
Cilantro.
Yarrow.
Sunflowers.
Choose plants appropriate for your growing conditions, and avoid invasive species.
Allowing some herbs and vegetables to flower can also support beneficial insects.
Reduce unnecessary pesticide use and follow integrated pest management practices.
A diverse garden is often more resilient than one containing only a few crops.
Gardening in Small Spaces
You don't need a large yard to grow food.
Containers, balconies, patios, and small raised beds can produce meaningful harvests.
Good Vegetables for Containers
Lettuce.
Spinach.
Radishes.
Bush beans.
Compact tomatoes.
Peppers.
Herbs.
Certain compact kale varieties.
Use containers with drainage holes and a quality potting mix.
Larger crops generally require larger containers.
Pay particular attention to watering, because containers can dry out quickly during warm weather.
At Urban Harvest Exchange, our Peppers for the People program helps encourage apartment dwellers and other gardeners with limited space to grow peppers in one-gallon containers.
Even one productive plant can help someone begin learning to grow food.
Spring Gardening and Food Sovereignty
At Urban Harvest Exchange, gardening is about much more than producing vegetables.
It's about helping people gain the knowledge, confidence, and resources to participate in their own food supply.
We rescue and distribute approximately five tons of food every week, making it available free to our community through the sharing tables at Tacoma Urban Farm.
We also operate community gardens, maintain Food Independence Gardens throughout Tacoma, organize fruit gleaning, and provide free gardening education.
Spring is when much of that work begins.
Every seed we start, every raised bed we prepare, and every vegetable we plant contributes to a stronger local food system.
And when gardeners share their surplus harvests, they help keep good food from going to waste while nourishing their neighbors.
Food sovereignty starts with knowledge, access, and the opportunity to grow food.
Your Spring Gardening Checklist
Before the growing season gets into full swing, make sure you've completed these important tasks:
Review last year's garden successes and challenges.
Plan your garden layout and crop rotation.
Test soil and identify amendment needs.
Prepare garden beds when the soil is workable.
Start appropriate seeds indoors.
Direct-sow cool-season vegetables.
Inspect and repair raised beds and trellises.
Install or repair irrigation systems.
Prepare frost protection for tender plants.
Harden off seedlings before transplanting.
Plant flowers to support pollinators.
Plan succession plantings for continuous harvests.
Mulch and monitor soil moisture.
Check regularly for pests and diseases.
Share extra seeds, plants, and produce with neighbors.
Looking Ahead to the 2027 Growing Season
At Tacoma Urban Farm, we're preparing for one of our biggest growing seasons yet.
Our expansion to 42 raised beds will increase our capacity to grow fresh vegetables for our community.
We're also preparing our greenhouses for seed starting and continuing our work at community gardens and Food Independence Gardens throughout Tacoma.
As always, volunteers, donated seeds, soil, compost, irrigation supplies, and community support help make this possible.
Whether you have gardening experience or are just getting started, there are opportunities to get involved.
Visit https://urbanharvestexchange.org to learn more about volunteering, donating, and supporting our programs.
Final Thoughts: Start Small, Grow More, Share the Harvest
Spring gardening is an opportunity to reconnect with nature, learn new skills, and become more involved in producing our own food.
You don't need expensive equipment or a large garden.
Start with a few vegetables you enjoy eating.
Learn how your soil behaves.
Pay attention to the weather.
Plant at the right time.
And don't be afraid to make mistakes. Every growing season teaches us something new.
Most importantly, remember that gardening isn't just about what we harvest for ourselves.
It's also about what we can share.
A single seed can become a plant. A single plant can produce a harvest. And a shared harvest can help strengthen an entire community.
That's the philosophy behind Urban Harvest Exchange.
Rescue the Harvest – Nourish the People.
David Thompson
Founder/Director, Urban Harvest Exchange
WSU Pierce County Master Gardener
