Frost Dates for Deer Park, WA 99006
Last spring frost May 13 · First fall frost October 3 · 143 frost-free days · USDA Zone 6b
Frost probability for 99006
| Frost | 10% | 50% | 90% |
|---|---|---|---|
| Spring (last frost) | June 3 | May 13 | April 18 |
| Fall (first frost) | September 19 | October 3 | October 17 |
Dates come from NOAA 1971–2000 freeze probabilities at the nearest reporting station (36.5 km away); the 50% date is the median year.
Month by month in Deer Park
| Month | What to do |
|---|---|
| January | Plan your garden layout and order seeds. Research varieties suited to your frost dates. |
| February | Start the slowest-growing crops indoors: onions, leeks, and celery (10–12 weeks before last frost). |
| March | Start peppers and eggplant indoors 8–10 weeks before your last frost (around May 13). Start tomatoes about two weeks later, 6–8 weeks before last frost. |
| April | Start herbs, basil, and squash indoors (4–6 weeks before frost). Direct sow peas, spinach, and lettuce if soil is workable. |
| May | Last frost around May 13. Transplant cold-hardy crops (broccoli, kale, cabbage). Harden off tomato and pepper seedlings. |
| June | Frost has passed. Transplant tomatoes, peppers, and basil outdoors. Direct sow beans, cucumbers, squash, and zucchini. |
| July | Succession plant lettuce and greens. Keep beds weeded and watered consistently. |
| August | Harvest regularly to encourage production. Monitor for pests and disease. |
| September | First fall frost approaching (around October 3). Transplant fall brassicas. Sow spinach, arugula, and radishes. |
| October | First frost around October 3. Harvest tomatoes and peppers before frost. Cover cold-hardy crops with row covers to extend the season. |
| November | Harvest remaining cold-hardy crops: kale, carrots, and beets. Plant garlic bulbs for next year. |
| December | Clean up spent plants. Add compost to beds. Rest, review, and plan next year's garden. |
What grows in a 143-day season
Frequently Asked Questions
What is the last frost date for Deer Park, WA (ZIP 99006)?
The median last spring frost date for Deer Park, WA (ZIP code 99006) is around May 13. This is the 50th-percentile date — meaning half of all years see frost end before this date. Use the 10% and 90% dates to understand the full range of risk in your area.
What is the first fall frost date in Deer Park, WA?
The median first fall frost date for Deer Park, WA is around October 3. Plan to harvest or protect frost-sensitive crops like tomatoes and peppers at least a week before this date to avoid losses.
How long is the growing season in Deer Park, WA?
The frost-free growing season in Deer Park is about 143 days. This window — from your last spring frost to your first fall frost — is when warm-season vegetables thrive. Cold-hardy crops like kale, spinach, and peas can extend your season by weeks on either side.
What USDA hardiness zone is Deer Park, WA?
Based on frost date patterns, Deer Park falls approximately in 6b. USDA hardiness zones are determined by average annual minimum winter temperatures and guide both plant selection and planting timing for your location.
When should I start tomatoes indoors in Deer Park, WA?
Start tomato seeds indoors 6–8 weeks before your last frost date (around May 13). For Deer Park, that's roughly March 18 to April 1. Transplant outdoors 1–2 weeks after your last frost.
Nearby and related
- Frost dates for Colbert, WA 99005 (10.1 mi)
- Frost dates for Nine Mile Falls, WA 99026 (11.5 mi)
- Frost dates for Spokane, WA 99208 (12 mi)
- Frost dates for Spokane, WA 99205 (17.9 mi)
- Frost dates for Spokane, WA 99217 (18.5 mi)
- When to plant in WA
- When to plant Peppers in WA
- When to plant Cucumbers in WA
- When to plant Zucchini in WA
- When to plant Butternut Squash in WA
- When to plant Basil in WA
- When to plant Sweet Corn in WA
- Look up another ZIP