Pierce County, WA — Planting Guide
Pierce County is in USDA Zone 8a. The average last spring frost is April 13 and the first fall frost is October 30, giving you a growing season of approximately 200 days.
At an elevation of 168 ft, Pierce County receives approximately 48.9 in of rainfall annually. Summer highs average 83°F with winter lows around 44°F. The predominant soil type is Silt Loam.
Based on 31 years of NOAA climate station data, the last frost date here varies by 54 days year to year — ranging from March 23 in warm years to May 16 in cold years. The growing season is trending shorter by about 2.04 days per decade. Pierce County scores 61/100 (Good) on the Microclimate Index.
🌡️ Zone
8a (10°F to 15°F min)
❄️ Last Frost
April 13
🍂 First Frost
October 30
📅 Growing Season
200 days
⛰️ Elevation
168 ft
🌧️ Annual Rainfall
48.9 in
Monthly Watering Calendar
When you'll need to water your garden — based on average monthly rainfall vs. the ~1 inch/week most gardens need.
View detailed monthly data
| Month | Avg Rainfall | Rainy Days | Extra Water Needed | Watering Effort |
|---|---|---|---|---|
| Jan | 6.8 in | 15 days | — | None |
| Feb | 5.7 in | 13 days | — | Low |
| Mar | 4.4 in | 15 days | — | Low |
| Apr | 4.1 in | 13 days | 0.2 in | Low |
| May | 2.8 in | 10 days | 1.5 in | Moderate |
| Jun | 2 in | 6 days | 2.3 in | High |
| Jul | 0.9 in | 2 days | 3.4 in | Critical |
| Aug | 0.9 in | 2 days | 3.4 in | Critical |
| Sep | 2 in | 4 days | 2.3 in | High |
| Oct | 4.7 in | 10 days | — | Low |
| Nov | 7.8 in | 17 days | — | Low |
| Dec | 6.8 in | 15 days | — | None |
Annual total: 48.9 in. Gardens typically need ~1 inch of water per week during the growing season. Months marked "None" for extra water are outside the active growing season for your zone — most gardens are dormant and don't need irrigation during those months.
Pierce County Soil Profile
Soil Type
Silt Loam
Soil pH
5.4-6.2
Drainage
Well Drained
Frost Risk Probability
Based on 31 years of NOAA weather station data from 3 stations
Beginners: Plant frost-sensitive crops (tomatoes, peppers, squash) after the "Safe" date on the left. Harvest or cover them before the "Protect by" date on the right. Hardy crops (lettuce, peas, kale) can go in the yellow transition zones.
How to read this table: "Conservative" means you're safe from frost 9 out of 10 years — best for beginners and frost-sensitive crops. "Average year" is the typical date. "Aggressive" means only 1 in 10 years is that warm — experienced gardeners with frost protection can try these dates.
| Planting Strategy | Last Spring Frost | First Fall Frost | Frost-Free Days |
|---|---|---|---|
| Conservative (safest) | May 16 | Nov 24 | 192 days |
| Cautious | Apr 30 | Nov 10 | 194 days |
| Average year | Apr 13 | Oct 30 | 200 days |
| Optimistic | Apr 4 | Oct 13 | 192 days |
| Aggressive (risky) | Mar 23 | Sep 30 | 191 days |
Not very — frost dates can vary by ±54 days year-to-year. Use the "Conservative" row in the table below, and keep row covers handy for surprise late frosts.
Yes — growing seasons are getting shorter here (about 2 days per decade). Use the "Conservative" dates and choose fast-maturing varieties.
Gardening Difficulty Score
Pierce County offers good growing conditions. A little planning around frost dates goes a long way.
Local Gardening Help in Pierce County
Free expert help is closer than you think. Your county's cooperative extension office connects you with trained gardeners, soil testing labs, and local programs — all specific to Pierce County's climate and soil.
County Extension Office
Pierce County Washington State University Extension Extension Office
Phone: 509-335-2811
Visit Extension Office Website →
Extension offices are run by land-grant universities and funded by the USDA. Their advice is free, research-based, and tailored to your county's specific conditions.
Master Gardener Program
Free gardening help from trained volunteers
Master Gardeners are community volunteers who complete 40–60 hours of university horticultural training. They answer gardening questions, diagnose plant problems, and offer workshops — all free.
Many extension offices run a Master Gardener hotline where you can call or email with photos of plant problems for free diagnosis.
Soil Testing
Available through your extension office
Before amending your soil, get it tested. Your extension office offers soil testing (typically $10–$25) that tells you exact pH, nutrient levels, and amendment recommendations specific to what you want to grow.
Services Available in Pierce County
Finding local nurseries & garden centers in Pierce County
Why Buy Local
Local nurseries carry plants that are proven to grow in your area. Staff can give you advice specific to Pierce County's soil and climate that big-box stores can't. Plants from local growers are typically hardier because they're already acclimated to your zone.
How to Find Them
Search for "nurseries near Pierce County WA" or "garden center Pierce County" on Google Maps. Also check with your extension office — they often maintain lists of reputable local nurseries and plant sales.
Community gardens & gardening groups
Community gardens are a great way to learn from experienced gardeners in your area, especially if you're limited on space. Search "community garden Pierce County WA" or check your extension office and local parks department. Facebook groups like "Pierce County Gardeners" or "Washington Gardening" are also excellent for local advice and plant swaps.
What to Plant After Your Harvest
After your first crops finish, use the remaining frost-free days to grow a second round.
Show 6 more succession options
Sunlight & Day Length
Monthly daylight hours and peak sun — critical for onion varieties, photoperiod-sensitive plants, and solar garden planning.
Longest Day
15.7 hours
Summer solstice daylight
Shortest Day
8.3 hours
Winter solstice daylight
Peak Sun Hours
11.1 hr/day peak (summer)
Peak sun hours (green dashed line below) account for cloud cover — this is the usable direct sunlight your garden actually receives. Most vegetables need 6+ peak sun hours.
Onion tip: Your long summer days (14+ hours) support long-day onion varieties like Walla Walla, Sweet Spanish, and Ailsa Craig.
View detailed monthly data
| Month | Daylight Hours | Peak Sun Hours | Day Length |
|---|---|---|---|
| January | 8.7 hr | 2.1 hr | Short day |
| February | 10 hr | 2.9 hr | Short day |
| March | 11.6 hr | 4.1 hr | Short day |
| April | 13.4 hr | 5.4 hr | Neutral |
| May | 14.9 hr | 7.1 hr | Long day |
| June | 15.7 hr | 8.6 hr | Long day |
| July | 15.3 hr | 11.1 hr | Long day |
| August | 14 hr | 9.7 hr | Long day |
| September | 12.3 hr | 7.1 hr | Neutral |
| October | 10.6 hr | 4 hr | Short day |
| November | 9.1 hr | 2.3 hr | Short day |
| December | 8.3 hr | 1.8 hr | Short day |
Peak sun hours factor in typical cloud cover — use these for solar panel and shade-planning calculations.
Soil Temperature & Composting Calendar
Monthly soil temps tell you when to plant warm-season crops, and when your compost pile is actively working.
Plant Warm Crops When
Soil reaches 60°F+
Soil warm enough from Apr through Oct.
Best Month to Compost
May
Microbial activity peaks when soil is warm.
Active Composting
8 months
Nearly year-round composting.
View detailed monthly data
| Month | Soil 4" Deep | Soil 8" Deep | Compost Activity | Time to Finish |
|---|---|---|---|---|
| Jan | 43°F | 49°F | 🐢 Slow | ~24 weeks |
| Feb | 45°F | 48°F | 🐢 Slow | ~24 weeks |
| Mar | 49°F | 53°F | 🐢 Slow | ~24 weeks |
| Apr | 62°F | 61°F | ♻️ Active | ~14 weeks |
| May | 70°F | 68°F | 🔥 Peak | ~8 weeks |
| Jun | 81°F | 75°F | 🔥 Peak | ~8 weeks |
| Jul | 90°F | 83°F | 🔥 Peak | ~8 weeks |
| Aug | 89°F | 85°F | 🔥 Peak | ~8 weeks |
| Sep | 84°F | 82°F | 🔥 Peak | ~8 weeks |
| Oct | 74°F | 74°F | 🔥 Peak | ~8 weeks |
| Nov | 60°F | 65°F | ♻️ Active | ~14 weeks |
| Dec | 47°F | 54°F | 🐢 Slow | ~24 weeks |
Highlighted rows = soil 60°F+ (safe for warm-season transplants). Compost finishes fastest during peak activity months.
Pest & Disease Pressure in Pierce County
Computed from local climate patterns — warmer, humid conditions increase pest generations and fungal disease risk.
Insect Pest Pressure
Moderate — common pests appear but manageable with monitoring.
Disease Risk
High fungal/bacterial risk. Space plants for airflow, water at soil level.
Seasonal Risk
View 6 common pests in your area
| Pest | Risk Level | Peak Months |
|---|---|---|
| Aphids | High | Mar, Apr, May, Jun, Jul, Aug, Sep, Oct, Nov |
| Squash vine borers | Moderate | May, Jun, Jul |
| Stink bugs | High | Apr, May, Jun, Jul, Aug, Sep, Oct |
| Whiteflies | Moderate | May, Jun, Jul, Aug, Sep, Oct |
| Spider mites | High | Jun, Jul, Aug, Sep |
| Fire ants | Moderate | Mar, Apr, May, Jun, Jul, Aug, Sep, Oct |
Organic pest management tips
- Use row covers on susceptible crops during peak pest months
- Apply neem oil preventatively every 7-14 days during active pest season
- Interplant with strong-scented herbs (basil, marigold) to confuse pests
- Hand-pick larger pests (beetles, caterpillars) in early morning when they're sluggish
- Practice crop rotation — never plant the same family in the same spot within 3 years
- Watch for powdery mildew, downy mildew, blight — common in your climate
Cover Crops for Pierce County
Cover crops protect bare soil, fix nitrogen, suppress weeds, and improve soil structure — with county-specific planting dates.
Fall Cover Crops (7 options) — Plant after harvest to protect soil over winter
| Crop | Plant By | Terminate | N-Fixing | Soil Benefit |
|---|---|---|---|---|
| Austrian winter peas | Aug 19 | Mar 30 | ✓ Yes | Fixes nitrogen, good for heavy clay soils |
| Crimson clover | Sep 3 | Mar 30 | ✓ Yes | Fixes nitrogen, attracts pollinators in spring |
| Daikon radish | Sep 7 | Mar 23 | — | Deep taproot breaks compaction, excellent for clay soils |
| Hairy vetch | Aug 14 | Mar 30 | ✓ Yes | Excellent nitrogen fixer, good for depleted soils |
| Oats | Sep 28 | Mar 30 | — | Quick biomass, winterkills in cold zones — no spring tillage needed |
| Winter rye | Aug 10 | Mar 30 | — | Suppresses weeds, prevents erosion, breaks up compacted soil |
| Winter wheat | Aug 9 | Mar 23 | — | Erosion control, weed suppression, good biomass |
Spring Cover Crops (4 options) — Build soil before the main growing season
| Crop | Plant By | Terminate | N-Fixing | Soil Benefit |
|---|---|---|---|---|
| Buckwheat | Apr 21 | Aug 28 | — | Rapid growth, attracts pollinators, suppresses weeds |
| Cowpeas (southern peas) | Apr 19 | Aug 21 | ✓ Yes | Excellent nitrogen fixer for warm climates, edible |
| Sorghum-sudan grass | Apr 14 | Sep 4 | — | Massive biomass, breaks compaction, suppresses nematodes |
| White clover | Mar 16 | Aug 28 | ✓ Yes | Living mulch, fixes nitrogen, permanent ground cover |
Summer Cover Crops (1 options) — Fill gaps and suppress weeds between plantings
| Crop | Plant By | Terminate | N-Fixing | Soil Benefit |
|---|---|---|---|---|
| Sunflowers | Apr 30 | Oct 2 | — | Deep roots break compaction, attract pollinators and beneficial insects |
Wind & Microclimate
Wind dries soil, stresses plants, and affects frost patterns. Understanding your exposure helps with garden placement.
Seasonal Wind Speed
Spring: 11 mph Summer: 8 mph
Fall: 9 mph Winter: 12 mph
Prevailing wind: SW. Moderate wind — consider a temporary windbreak for young seedlings.
Windbreak Benefit
4.6/10
Moderately beneficial — a simple fence or trellis can protect delicate crops from wind stress.
Frost Pocket Risk
Moderate
Some terrain variation (605 ft range). Garden on slopes or higher ground if possible to avoid late-season frost pockets.
Rainwater Harvesting Potential
How much water you can collect, when to collect it, and what size system you need for your garden.
Annual Collection
24,371 gal
Per 1,000 sq ft of roof area (at 80% collection efficiency)
Recommended Setup
6 rain barrels (55 gal each)
For a typical 500 sq ft garden. Serious collectors: consider a 2,000 gal tank.
Legal Status
Unrestricted
Rainwater harvesting is fully legal in your state with no restrictions.
Best Collection Months
Jan, Feb, Nov, Dec
Highest rainfall months — your barrels will fill up quickly during these months.
Months to Draw From Storage
Jul, Aug
Dry months when you'll rely on stored water — size your storage for this gap.
Rainwater collection tips for your area
- Your county receives approximately 48.9 inches of rain per year
- A 1,000 sq ft roof can collect roughly 24,371 gallons annually
- Rainwater harvesting is fully legal in your state
- Use a first-flush diverter to keep roof debris out of your collection
Soil & Growing Conditions in Pierce County
Soil Type
Silt Loam
Soil pH 5.4–6.2 · Moderately Well Drained drainage
Native soil is well-suited to most vegetables and herbs with regular compost additions.
Watering Needs
Drought stress: 3.5/10
Low-to-moderate drought stress. Plan to water 1–2 times per week during peak summer. (48.9 in. annual rainfall)
Season Tips
200-day frost-free season
Plenty of time for warm-season crops. Start heat-lovers indoors 6–8 weeks before last frost to maximise your harvest window.
Free Garden Planner
Plan your entire garden season — organize planting dates, track what you're growing, and know exactly when to start seeds, transplant, and harvest.
Recommended for Your Garden
Test your soil pH, nitrogen, phosphorus, and potassium levels before planting.
Get instant, accurate soil pH readings to fine-tune your amendments.
Boost soil fertility and structure with rich, well-aged organic compost.
🥬 Vegetables to Grow in Pierce County
115 vegetables that grow well in Zone 8a with planting dates for Pierce County.
Show all 115 vegetables with planting dates
| Plant | Start Indoors | Direct Sow | Transplant | Harvest | Days to Maturity |
|---|---|---|---|---|---|
| Acorn Squash | Mar 16 | Apr 20 | Apr 27 | Jul 20 – Aug 24 | 80–100 |
| Amaranth | Feb 23 | Apr 20 | Apr 27 | Jul 27 – Sep 14 | 90–120 |
| Artichoke | — | — | Apr 27 | Aug 31 – Nov 9 | 120–180 |
| Arugula | Mar 9 | Mar 30 | Apr 13 | May 18 – Jul 20 | 30–50 |
| Asparagus | — | — | Apr 27 | — | 730–1095 |
| Beets | — | Mar 30 | — | May 25 – Jun 22 | 50–70 |
| Belgian Endive | Mar 9 | Mar 30 | Apr 13 | Aug 3 – Sep 28 | 110–150 |
| Bitter Melon | Feb 23 | Apr 20 | Apr 27 | Jun 29 – Aug 10 | 60–90 |
| Black Beans | — | Apr 20 | — | Jul 20 – Sep 7 | 90–120 |
| Bok Choy | Mar 9 | Mar 30 | Apr 13 | May 25 – Jun 29 | 40–60 |
| Broccoli | Mar 9 | Mar 30 | Apr 13 | Jun 15 – Jul 27 | 60–90 |
| Broccoli Rabe | Mar 9 | Mar 30 | Apr 13 | May 25 – Jun 29 | 40–60 |
| Brussels Sprouts | Mar 9 | Mar 30 | Apr 13 | Jul 13 – Sep 7 | 90–130 |
| Butternut Squash | Mar 16 | Apr 20 | Apr 27 | Jul 27 – Aug 31 | 85–110 |
| Cabbage | Mar 9 | Mar 30 | Apr 13 | Jun 15 – Aug 10 | 60–100 |
| Calabash | Feb 23 | Apr 20 | Apr 27 | Jul 20 – Sep 14 | 80–120 |
| Cardoon | — | — | Apr 27 | Aug 31 – Oct 12 | 120–150 |
| Carrots | — | Mar 30 | — | Jun 1 – Jul 6 | 60–80 |
| Cauliflower | Mar 9 | Mar 30 | Apr 13 | Jun 8 – Aug 10 | 55–100 |
| Celeriac | Mar 9 | Mar 30 | Apr 13 | Jul 27 – Aug 31 | 100–120 |
| Celery | Mar 9 | Mar 30 | Apr 13 | Jul 6 – Aug 31 | 80–120 |
| Celtuce | Mar 9 | Mar 30 | Apr 13 | Jun 15 – Jul 27 | 60–90 |
| Chard | Mar 9 | Mar 30 | Apr 13 | Jun 8 – Jul 27 | 50–60 |
| Chayote | Feb 23 | Apr 20 | Apr 27 | Aug 31 – Nov 9 | 120–180 |
| Chickpeas | Mar 9 | Mar 30 | Apr 13 | Jul 6 – Aug 17 | 80–110 |
| Chicory | Mar 9 | Mar 30 | Apr 13 | Jun 15 – Jul 27 | 60–85 |
| Chinese Cabbage | Mar 9 | Mar 30 | Apr 13 | Jun 8 – Jul 6 | 50–70 |
| Christmas Lima Beans | Feb 23 | Apr 20 | Apr 27 | Jul 20 – Aug 24 | 80–100 |
| Collard Greens | Mar 9 | Mar 30 | Apr 13 | Jun 8 – Aug 10 | 55–75 |
| Corn | — | Apr 20 | — | Jun 22 – Aug 17 | 60–100 |
| Cowpeas | — | Apr 20 | — | Jun 22 – Aug 3 | 60–90 |
| Cress | Mar 9 | Mar 30 | Apr 13 | Apr 27 – May 18 | 14–21 |
| Crookneck Squash | Mar 16 | Apr 20 | Apr 27 | Jun 15 – Jul 13 | 45–60 |
| Crosne | — | Mar 30 | — | Aug 31 – Nov 2 | 150–200 |
| Cucumber | Mar 16 | Apr 20 | Apr 27 | Jun 22 – Aug 17 | 50–70 |
| Daikon | — | Mar 30 | — | May 25 – Jun 22 | 50–70 |
| Delicata Squash | Mar 16 | Apr 20 | Apr 27 | Jul 20 – Aug 24 | 80–100 |
| Edamame | — | Apr 20 | — | Jul 6 – Aug 17 | 75–100 |
| Eggplant | Feb 9 | Apr 20 | Apr 27 | Jul 6 – Sep 7 | 65–85 |
| Endive | Mar 9 | Mar 30 | Apr 13 | Jun 1 – Jul 6 | 45–65 |
| Escarole | Mar 9 | Mar 30 | Apr 13 | Jun 8 – Jul 6 | 50–70 |
| Fava Beans | Mar 9 | Mar 30 | Apr 13 | Jun 29 – Aug 10 | 75–100 |
| Fennel | Feb 23 | Apr 20 | Apr 27 | Jun 29 – Aug 10 | 60–90 |
| Garlic | — | — | — | — | 90–240 |
| Ginger | Feb 23 | Apr 20 | Apr 27 | Dec 28 – Jan 11 | 240–300 |
| Green Beans | — | Apr 20 | — | Jun 15 – Aug 10 | 50–65 |
| Horseradish | — | — | Apr 27 | Aug 31 – Nov 9 | 120–180 |
| Hot Peppers | Feb 9 | Apr 20 | Apr 27 | Jul 6 – Oct 12 | 70–120 |
| Hubbard Squash | Mar 16 | Apr 20 | Apr 27 | Aug 10 – Sep 14 | 100–120 |
| Jicama | Feb 23 | Apr 20 | Apr 27 | Aug 31 – Nov 9 | 120–180 |
| Kabocha | Mar 16 | Apr 20 | Apr 27 | Jul 27 – Aug 24 | 85–100 |
| Kai Lan | Mar 9 | Mar 30 | Apr 13 | Jun 1 – Jun 29 | 45–60 |
| Kale | Mar 9 | Mar 30 | Apr 13 | Jun 8 – Aug 3 | 50–70 |
| Kidney Beans | — | Apr 20 | — | Jul 20 – Aug 24 | 85–110 |
| Kohlrabi | Mar 9 | Mar 30 | Apr 13 | Jun 1 – Jul 6 | 45–65 |
| Komatsuna | Mar 9 | Mar 30 | Apr 13 | May 18 – Jun 22 | 35–50 |
| Leeks | Mar 9 | Mar 30 | Apr 13 | Jul 13 – Sep 28 | 90–150 |
| Lentils | Mar 9 | Mar 30 | Apr 13 | Jul 6 – Aug 17 | 80–110 |
| Lettuce | Mar 9 | Mar 30 | Apr 13 | May 18 – Jul 27 | 30–60 |
| Lima Beans | — | Apr 20 | — | Jun 22 – Aug 3 | 60–90 |
| Loofah | Feb 23 | Apr 20 | Apr 27 | Aug 10 – Oct 12 | 100–150 |
| Luffa | Feb 23 | Apr 20 | Apr 27 | Jul 27 – Oct 12 | 90–150 |
| Mache | Mar 9 | Mar 30 | Apr 13 | May 25 – Jun 29 | 40–60 |
| Malabar Spinach | Feb 23 | Apr 20 | Apr 27 | Jun 22 – Jul 20 | 55–70 |
| Melon | Mar 16 | Apr 20 | Apr 27 | Jul 6 – Aug 24 | 70–100 |
| Microgreens | Mar 9 | Mar 30 | Apr 13 | Apr 20 – May 18 | 7–21 |
| Mitsuba | Mar 9 | Mar 30 | Apr 6 | Jun 1 – Jul 27 | 50–70 |
| Mizuna | Mar 9 | Mar 30 | Apr 13 | May 18 – Jun 15 | 30–45 |
| Mustard Greens | Mar 9 | Mar 30 | Apr 13 | May 18 – Jul 20 | 30–50 |
| Napa Cabbage | Mar 9 | Mar 30 | Apr 13 | Jun 8 – Jul 13 | 55–75 |
| New Zealand Spinach | Feb 23 | Apr 20 | Apr 27 | Jun 22 – Jul 20 | 55–70 |
| Okra | Feb 23 | Apr 20 | Apr 27 | Jun 22 – Aug 17 | 50–65 |
| Onion | Mar 9 | Mar 30 | Apr 13 | Jul 13 – Aug 31 | 90–120 |
| Pac Choi | Mar 9 | Mar 30 | Apr 13 | May 25 – Jun 22 | 40–55 |
| Parsnip | — | Mar 30 | — | Jul 13 – Aug 24 | 100–130 |
| Patty Pan Squash | Mar 16 | Apr 20 | Apr 27 | Jun 15 – Jul 13 | 45–60 |
| Peas | Mar 9 | Mar 30 | Apr 13 | Jun 8 – Aug 3 | 55–70 |
| Peppers | Feb 9 | Apr 20 | Apr 27 | Jun 29 – Sep 7 | 60–90 |
| Pole Beans | Feb 23 | Apr 20 | Apr 27 | Jun 22 – Aug 17 | 55–70 |
| Potatoes | Feb 23 | Apr 20 | Apr 27 | Jul 6 – Sep 14 | 70–120 |
| Pumpkin | Mar 16 | Apr 20 | Apr 27 | Jul 27 – Sep 14 | 85–120 |
| Purslane | Mar 9 | Mar 30 | Apr 13 | May 25 – Jun 29 | 40–60 |
| Radicchio | Mar 9 | Mar 30 | Apr 13 | Jun 15 – Jul 20 | 60–80 |
| Radish | — | Mar 30 | — | Apr 27 – May 18 | 22–35 |
| Rhubarb | — | — | May 4 | — | 365–730 |
| Romanesco | Mar 9 | Mar 30 | Apr 13 | Jun 29 – Aug 10 | 75–100 |
| Rutabaga | — | Mar 30 | — | Jun 22 – Jul 27 | 80–100 |
| Salsify | — | Mar 30 | — | Jul 13 – Aug 24 | 100–130 |
| Savoy Cabbage | Mar 9 | Mar 30 | Apr 13 | Jun 22 – Aug 17 | 70–110 |
| Scallions | Mar 9 | Mar 30 | Apr 13 | Jun 8 – Jul 6 | 50–70 |
| Scarlet Runner Beans | Feb 23 | Apr 20 | Apr 27 | Jun 29 – Aug 3 | 60–80 |
| Shallot | Mar 9 | Mar 30 | Apr 13 | Jul 13 – Aug 31 | 90–120 |
| Shiso | Feb 23 | Apr 20 | Apr 27 | Jun 22 – Aug 17 | 50–70 |
| Snap Peas | Feb 23 | Apr 20 | Apr 27 | Jun 22 – Aug 17 | 55–70 |
| Snow Peas | Mar 9 | Mar 30 | Apr 13 | Jun 8 – Aug 3 | 50–65 |
| Soybeans | — | Apr 20 | — | Jul 13 – Sep 7 | 80–120 |
| Spaghetti Squash | Mar 16 | Apr 20 | Apr 27 | Jul 27 – Aug 24 | 85–100 |
| Spinach | Mar 9 | Mar 30 | Apr 13 | May 18 – Jul 20 | 35–50 |
| Squash (Summer) | Mar 16 | Apr 20 | Apr 27 | Jun 15 – Aug 17 | 45–65 |
| Squash (Winter) | Mar 16 | Apr 20 | Apr 27 | Jul 20 – Sep 14 | 80–120 |
| Sunchoke | — | — | Apr 27 | Aug 17 – Oct 12 | 110–150 |
| Sunflower | Feb 23 | Apr 20 | Apr 27 | Jul 6 – Aug 24 | 70–100 |
| Sweet Corn | — | Apr 20 | — | Jun 22 – Aug 3 | 60–90 |
| Sweet Potatoes | Feb 23 | Apr 20 | Apr 27 | Jul 27 – Sep 14 | 90–120 |
| Tatsoi | Mar 9 | Mar 30 | Apr 13 | May 18 – Jun 22 | 35–50 |
| Tomatillo | Feb 23 | Apr 20 | Apr 27 | Jun 29 – Sep 7 | 60–85 |
| Tomatoes | Feb 23 | Apr 20 | Apr 27 | Jun 29 – Sep 7 | 60–85 |
| Turmeric | Feb 23 | Apr 20 | Apr 27 | Dec 28 – Jan 11 | 240–300 |
| Turnip | — | Mar 30 | — | May 11 – Jun 15 | 40–60 |
| Watercress | Mar 9 | Mar 30 | Apr 13 | May 25 – Jun 29 | 40–60 |
| Watermelon | Mar 16 | Apr 20 | Apr 27 | Jul 6 – Aug 24 | 70–100 |
| Wax Beans | — | Apr 20 | — | Jun 15 – Aug 10 | 50–65 |
| Winter Melon | Feb 23 | Apr 20 | Apr 27 | Jul 27 – Sep 14 | 90–120 |
| Yard Long Beans | Feb 23 | Apr 20 | Apr 27 | Jun 22 – Aug 3 | 55–80 |
| Zucchini | Mar 16 | Apr 20 | Apr 27 | Jun 15 – Aug 10 | 45–60 |
🍓 Fruits to Grow in Pierce County
27 fruits that grow well in Zone 8a with planting dates for Pierce County.
Show all 27 fruits with planting dates
| Plant | Start Indoors | Direct Sow | Transplant | Harvest | Days to Maturity |
|---|---|---|---|---|---|
| Alpine Strawberries | — | — | May 4 | Aug 3 – Nov 16 | 90–180 |
| Aronia | — | — | May 4 | — | 730–1095 |
| Blackberries | — | — | May 4 | — | 365–730 |
| Blueberries | — | — | May 4 | — | 730–1095 |
| Boysenberries | — | — | May 4 | — | 365–730 |
| Cantaloupe | — | — | May 4 | Jul 13 – Aug 17 | 70–90 |
| Che Fruit | — | — | May 4 | — | 1095–1825 |
| Elderberries | — | — | May 4 | — | 730–1095 |
| Figs | — | — | May 4 | — | 730–1825 |
| Goji Berries | — | — | May 4 | — | 730–1095 |
| Gooseberries | — | — | May 4 | — | 730–1095 |
| Grapes | — | — | May 4 | — | 730–1095 |
| Ground Cherry | — | — | May 4 | Jul 13 – Sep 7 | 65–80 |
| Hardy Kiwi | — | — | May 4 | — | 1095–1825 |
| Honeydew | — | — | May 4 | Jul 27 – Sep 7 | 80–110 |
| Jostaberry | — | — | May 4 | — | 730–1095 |
| Kiwi | — | — | May 4 | — | 1095–1825 |
| Loquat | — | — | May 4 | — | 730–1825 |
| Medlar | — | — | May 4 | — | 1095–1825 |
| Mulberries | — | — | May 4 | — | 730–1825 |
| Pawpaw | — | — | May 4 | — | 1095–2555 |
| Persimmon | — | — | May 4 | — | 1095–2555 |
| Pomegranate | — | — | May 4 | — | 730–1095 |
| Quince | — | — | May 4 | — | 1095–1825 |
| Raspberries | — | — | May 4 | — | 365–730 |
| Serviceberries | — | — | May 4 | — | 730–1095 |
| Strawberries | — | — | May 4 | Aug 3 – Jan 18 | 90–365 |
🌿 Herbs to Grow in Pierce County
42 herbs that grow well in Zone 8a with planting dates for Pierce County.
Show all 42 herbs with planting dates
| Plant | Start Indoors | Direct Sow | Transplant | Harvest | Days to Maturity |
|---|---|---|---|---|---|
| Angelica | Mar 9 | Mar 30 | Apr 6 | — | 365–730 |
| Anise | Mar 9 | Mar 30 | Apr 6 | Jul 6 – Sep 21 | 90–120 |
| Basil | Feb 23 | Apr 20 | Apr 27 | Jun 22 – Aug 24 | 50–75 |
| Bee Balm | — | — | Apr 20 | Jul 20 – Oct 5 | 90–120 |
| Borage | Mar 9 | Mar 30 | Apr 6 | Jun 1 – Jul 20 | 50–60 |
| Caraway | Mar 9 | Mar 30 | Apr 6 | — | 365–450 |
| Catnip | — | — | Apr 20 | Jun 22 – Aug 24 | 60–80 |
| Chamomile | Mar 9 | Mar 30 | Apr 6 | Jun 8 – Aug 17 | 60–90 |
| Chervil | Mar 9 | Mar 30 | Apr 6 | May 18 – Jul 20 | 40–60 |
| Chives | — | — | Apr 20 | Jun 22 – Aug 31 | 60–90 |
| Cilantro | Mar 9 | Mar 30 | Apr 6 | May 18 – Jul 20 | 40–60 |
| Comfrey | — | — | Apr 20 | Jun 22 – Aug 31 | 60–90 |
| Cumin | Mar 9 | Mar 30 | Apr 6 | Jul 20 – Sep 21 | 100–120 |
| Dill | Mar 9 | Mar 30 | Apr 6 | May 18 – Jul 20 | 40–60 |
| Echinacea | — | — | Apr 20 | Aug 24 – Nov 30 | 120–180 |
| Epazote | Feb 23 | Apr 20 | Apr 27 | Jun 15 – Aug 10 | 45–60 |
| Fennel (herb) | Mar 9 | Mar 30 | Apr 6 | Jun 8 – Aug 17 | 60–90 |
| Feverfew | — | — | Apr 20 | Jul 20 – Oct 5 | 90–120 |
| Garlic Chives | — | — | Apr 20 | Jun 22 – Aug 31 | 60–90 |
| Horehound | — | — | Apr 20 | Jul 6 – Aug 31 | 75–90 |
| Hyssop | — | — | Apr 20 | Jun 29 – Aug 31 | 70–90 |
| Lavender | — | — | Apr 20 | Jul 20 – Dec 21 | 90–200 |
| Lemon Balm | — | — | Apr 20 | Jun 22 – Aug 10 | 60–70 |
| Lemon Thyme | — | — | Apr 20 | Jun 29 – Aug 31 | 70–90 |
| Lemon Verbena | Feb 23 | Apr 20 | Apr 27 | Jun 29 – Sep 7 | 60–90 |
| Lemongrass | Feb 23 | Apr 20 | Apr 27 | Jul 13 – Oct 12 | 75–120 |
| Lovage | — | — | Apr 20 | Jun 29 – Aug 31 | 70–90 |
| Marjoram | — | — | Apr 20 | Jun 22 – Aug 31 | 60–90 |
| Mint | — | — | Apr 20 | Jun 22 – Aug 31 | 60–90 |
| Oregano | — | — | Apr 20 | Jun 22 – Aug 31 | 60–90 |
| Parsley | Mar 9 | Mar 30 | Apr 6 | Jun 8 – Aug 10 | 60–80 |
| Rosemary | — | — | Apr 20 | Jul 13 – Nov 30 | 80–180 |
| Rue | — | — | Apr 20 | Jun 29 – Aug 31 | 70–90 |
| Sage | — | — | Apr 20 | Jul 6 – Aug 31 | 75–90 |
| Savory | — | — | Apr 20 | Jun 15 – Aug 10 | 50–70 |
| Sorrel | Mar 9 | Mar 30 | Apr 6 | May 18 – Jul 20 | 40–60 |
| Stevia | Feb 23 | Apr 20 | Apr 27 | Jun 29 – Sep 7 | 60–90 |
| Tarragon | — | — | Apr 20 | Jun 22 – Aug 31 | 60–90 |
| Thai Basil | Feb 23 | Apr 20 | Apr 27 | Jun 22 – Aug 24 | 50–75 |
| Thyme | — | — | Apr 20 | Jun 29 – Aug 31 | 70–90 |
| Valerian | — | — | Apr 20 | Aug 24 – Nov 30 | 120–180 |
| Yarrow | — | — | Apr 20 | Jul 20 – Oct 5 | 90–120 |
Monthly Planting Guide for Pierce County
Gardening Guides & Resources
Helpful guides from The Ultimate Homestead to improve your garden in Pierce County.
Frequently Asked Questions
What planting zone is Pierce County, WA?
Pierce County is in USDA Hardiness Zone 8a. This zone classification determines which perennial plants survive winter and sets the baseline for frost timing across the county.
When is the last frost in Pierce County, WA?
Based on 31 years of NOAA weather station data, the median last spring frost in Pierce County falls around April 13. In 8 out of 10 years, last frost lands between March 23 and May 16 — a 54-day window of variability. Use May 16 as your conservative safe-to-plant date for frost-sensitive crops.
When is the first fall frost in Pierce County, WA?
The median first fall frost in Pierce County arrives around October 30. In cold years it can arrive as early as September 30; in mild years as late as November 24. Harvest or protect frost-sensitive crops — tomatoes, peppers, basil, squash — before this date.
How long is the growing season in Pierce County?
Pierce County has a frost-free growing season of approximately 200 days. This long season supports multiple succession plantings and warm-season crops that need extended heat, like sweet potatoes and melons. Climate records show the growing season is trending shorter by about 2.04 days per decade.
What is the soil like in Pierce County for gardening?
Pierce County has predominantly Silt Loam soil with a pH range of 5.4–6.2 and Moderately Well Drained drainage. Most vegetables and herbs grow well with standard composting and seasonal soil amendment.
What is grown commercially in Pierce County?
Pierce County has commercial agriculture that includes Wheat, Apples, Cattle, Potatoes, Hops. These crops reflect the local climate and soil conditions — what succeeds commercially often translates well to home gardens in the same area.
Is Pierce County a good location for home gardening?
Pierce County scores 61/100 (Good) on our Microclimate Index, which combines frost reliability, drought pressure, soil challenge, elevation risk, and long-term climate trend. Conditions here are moderate — most common crops grow well with standard timing and care.
Plan Your Garden with Confidence
Get our free Garden Planner — designed to help Pierce County gardeners in Zone 8a organize planting dates, track what's growing, and never miss a planting window.
Get Your Free Garden Planner →Free download. Plan your entire garden season in minutes.
