Frost Dates for Spokane, WA 99208
Last spring frost May 13 · First fall frost October 3 · 143 frost-free days · USDA Zone 6b
ZIP 99208 has about 58,700 people, the largest of 16 ZIP codes in Spokane.
Moderate season: 143 frost-free days. Spring frost risk spans April 18–June 7 (50 days). Fall frost risk spans September 19–October 17 (28 days).
Frost probability for 99208
| Frost | 10% | 50% | 90% |
|---|---|---|---|
| Spring (last frost) | June 7 | May 13 | April 18 |
| Fall (first frost) | September 19 | October 3 | October 17 |
Dates come from NOAA 1971–2000 freeze probabilities at WELLPINIT (41.7 km away); the 50% date is the median year.
Frost dates by ZIP code in Spokane, WA
| ZIP | Last spring frost (50%) | First fall frost (50%) | Zone |
|---|---|---|---|
| 99208 | May 13 | October 3 | 6b |
| 99205 | May 13 | October 3 | 7a |
| 99206 | May 6 | October 3 | 7a |
| 99223 | May 6 | October 3 | 6b |
| 99207 | May 6 | October 3 | 7a |
| 99216 | May 6 | October 3 | 7a |
| 99224 | May 13 | October 3 | 6b |
| 99212 | May 6 | October 3 | 7a |
| 99203 | May 15 | September 24 | 6b |
| 99217 | May 6 | October 3 | 6b |
| 99202 | May 6 | October 3 | 7a |
| 99218 | May 15 | September 24 | 7a |
| 99201 | May 15 | September 24 | 7a |
| 99204 | May 15 | September 24 | 7a |
| 99251 | May 15 | September 24 | 5b (est.) |
| 99258 | May 15 | September 24 | 7a |
Which crops fit a 143-day season in Spokane
In Spokane (143 frost-free days, a moderate season), 38 of 56 planner crops fit outright, 17 get two plantings, 1 crop is perennial.
| Crop | Start indoors | Plant out / sow | Days you have | Verdict | Last sow date |
|---|---|---|---|---|---|
| Tomato | Apr 8 | May 27–Jun 3 | 101 | fits: 80 days to maturity, 101 available after May 27. | Jun 3 |
| Pepper | Apr 1 | May 27–Jun 3 | 101 | fits: 75 days to maturity, 101 available after May 27. | Jun 8 |
| Lettuce | Mar 18 | Apr 15–Apr 22 | 178 | two-plantings: Plant Apr 15 and again by Aug 12; both mature before Oct 10. | Aug 12 |
| Carrots | — | Apr 22–Apr 29 | 185 | fits: 70 days to maturity, 185 available after Apr 22. | Aug 1 |
| Cucumber | Apr 22 | May 27–Jun 3 | 115 | fits: 60 days to maturity, 115 available after May 27. | Jul 7 |
| Beans | — | May 20–Jun 3 | 129 | fits: 60 days to maturity, 129 available after May 20. | Jul 14 |
| Peas | — | Mar 18–May 27 | 206 | fits: 65 days to maturity, 206 available after Mar 18. | Jul 23 |
| Zucchini | Apr 29 | May 27–Jun 3 | 115 | fits: 55 days to maturity, 115 available after May 27. | Jul 12 |
| Onion | Feb 18 | Apr 15–Apr 29 | 178 | fits: 100 days to maturity, 178 available after Apr 15. | — |
| Spinach | — | Mar 18–May 6 | 220 | two-plantings: Plant Mar 18 and again by Aug 31; both mature before Oct 24. | Aug 31 |
| Kale | Mar 4 | Apr 15–Apr 29 | 192 | two-plantings: Plant Apr 15 and again by Aug 16; both mature before Oct 24. | Aug 16 |
| Broccoli | Mar 18 | Apr 15–Apr 29 | 178 | fits: 80 days to maturity, 178 available after Apr 15. | Jul 8 |
| Cabbage | Mar 18 | Apr 15–Apr 29 | 192 | fits: 70 days to maturity, 192 available after Apr 15. | Aug 1 |
| Radish | — | Mar 18–Jun 10 | 206 | two-plantings: Plant Mar 18 and again by Sep 1; both mature before Oct 10. | Sep 1 |
| Beets | — | Mar 18–Jun 10 | 206 | two-plantings: Plant Mar 18 and again by Aug 2; both mature before Oct 10. | Aug 2 |
| Potatoes | — | Apr 29–May 6 | 164 | fits: 90 days to maturity, 164 available after Apr 29. | — |
| Garlic | — | Oct 3 | 248 | overwinter: Plant Oct 3 to Oct 24; harvest the following summer. | Oct 24 |
| Strawberry | — | Apr 8–Jun 3 | 199 | perennial: A perennial: plant Apr 8; it fruits from the following year and keeps producing for several years. | — |
| Corn | Apr 15 | May 20–May 27 | 115 | fits: 75 days to maturity, 115 available after May 20. | Jun 15 |
| Pumpkin | Apr 29 | May 27–May 27 | 108 | fits: 100 days to maturity, 108 available after May 27. | — |
| Cauliflower | Apr 1 | May 6–May 20 | 157 | fits: 75 days to maturity, 157 available after May 6. | Jul 13 |
| Swiss Chard | Mar 18 | Apr 29–Apr 29 | 164 | two-plantings: Plant Apr 29 and again by Aug 2; both mature before Oct 10. | Aug 2 |
| Arugula | — | Mar 18–Jun 10 | 220 | two-plantings: Plant Mar 18 and again by Aug 31; both mature before Oct 24. | Aug 31 |
| Brussel Sprouts | Mar 18 | Apr 15–Apr 29 | 192 | fits: 100 days to maturity, 192 available after Apr 15. | Jul 2 |
| Butternut Squash | Apr 29 | May 27–Jun 3 | 108 | fits: 100 days to maturity, 108 available after May 27. | — |
| Eggplant | Mar 25 | May 27–Jun 3 | 101 | fits: 70 days to maturity, 101 available after May 27. | Jun 13 |
| Okra | Apr 15 | May 20–May 27 | 122 | fits: 55 days to maturity, 122 available after May 20. | Jul 12 |
| Basil | Apr 8 | Jun 3–Jun 3 | 108 | fits: 60 days to maturity, 108 available after Jun 3. | Jul 7 |
| Cilantro | — | Apr 15–May 6 | 178 | two-plantings: Plant Apr 15 and again by Aug 7; both mature before Oct 10. | Aug 7 |
| Parsley | Mar 4 | May 20–May 27 | 143 | fits: 70 days to maturity, 143 available after May 20. | Jul 18 |
| Celery | Mar 4 | May 20–Jun 3 | 143 | fits: 120 days to maturity, 143 available after May 20. | May 29 |
| Scallions | Mar 4 | Apr 15–Apr 29 | 192 | two-plantings: Plant Apr 15 and again by Aug 11; both mature before Oct 24. | Aug 11 |
| Turnip | — | Apr 15–Apr 29 | 192 | two-plantings: Plant Apr 15 and again by Aug 21; both mature before Oct 24. | Aug 21 |
| Kohlrabi | — | Apr 1–Apr 15 | 206 | two-plantings: Plant Apr 1 and again by Aug 16; both mature before Oct 24. | Aug 16 |
| Bok Choy | Apr 15 | May 6–May 13 | 157 | two-plantings: Plant May 6 and again by Aug 12; both mature before Oct 10. | Aug 12 |
| Collards | Mar 4 | Apr 15–Apr 29 | 192 | two-plantings: Plant Apr 15 and again by Aug 11; both mature before Oct 24. | Aug 11 |
| Cantaloupe | Apr 29 | May 27–Jun 3 | 101 | fits: 85 days to maturity, 101 available after May 27. | May 29 |
| Chives | Feb 18 | May 20–May 27 | 157 | fits: 90 days to maturity, 157 available after May 20. | — |
| Dill | — | Mar 18–Jun 10 | 206 | two-plantings: Plant Mar 18 and again by Aug 2; both mature before Oct 10. | Aug 2 |
| Oregano | Mar 4 | May 20–May 27 | 157 | fits: 80 days to maturity, 157 available after May 20. | — |
| Rosemary | Feb 18 | May 20–May 27 | 143 | fits: 80 days to maturity, 143 available after May 20. | — |
| Sage | Mar 18 | May 20–May 27 | 157 | fits: 75 days to maturity, 157 available after May 20. | — |
| Thyme | Mar 4 | May 20–May 27 | 157 | fits: 90 days to maturity, 157 available after May 20. | — |
| Calendula | Apr 1 | Apr 29–May 13 | 164 | two-plantings: Plant Apr 29 and again by Aug 7; both mature before Oct 10. | Aug 7 |
| Cosmos | Apr 15 | May 13–May 27 | 129 | fits: 60 days to maturity, 129 available after May 13. | Jul 7 |
| Lavender | Feb 18 | May 13–May 27 | 164 | fits: 90 days to maturity, 164 available after May 13. | — |
| Marigolds | Apr 1 | May 13–May 20 | 129 | two-plantings: Plant May 13 and again by Jul 17; both mature before Sep 19. | Jul 17 |
| Melons | Apr 29 | May 27–Jun 3 | 101 | fits: 85 days to maturity, 101 available after May 27. | May 29 |
| Mint | — | May 13–May 27 | 164 | fits: 90 days to maturity, 164 available after May 13. | — |
| Nasturtiums | Apr 15 | May 13–May 20 | 129 | two-plantings: Plant May 13 and again by Jul 12; both mature before Sep 19. | Jul 12 |
| Pole Beans | — | May 20–Jun 3 | 122 | fits: 65 days to maturity, 122 available after May 20. | Jul 2 |
| Spaghetti Squash | Apr 29 | May 27–Jun 3 | 108 | fits: 90 days to maturity, 108 available after May 27. | May 31 |
| Sunflowers | — | May 13–May 27 | 129 | fits: 70 days to maturity, 129 available after May 13. | Jun 27 |
| Tomatillos | Mar 18 | May 20–May 27 | 108 | fits: 75 days to maturity, 108 available after May 20. | Jun 8 |
| Watermelon | Apr 29 | May 20–May 27 | 108 | fits: 80 days to maturity, 108 available after May 20. | Jun 3 |
| Yellow Squash | Apr 29 | May 27–Jun 3 | 115 | fits: 55 days to maturity, 115 available after May 27. | Jul 12 |
| Zinnias | Apr 15 | May 13–May 27 | 129 | fits: 60 days to maturity, 129 available after May 13. | Jul 7 |
Month by month in Spokane
| Month | What to do |
|---|---|
| January | Plan your garden layout and order seeds. Research varieties suited to your frost dates. |
| February | Start indoors: Chives (Feb 18), Lavender (Feb 18), Onion (Feb 18), Rosemary (Feb 18). |
| March | Start indoors: Celery (Mar 4), Collards (Mar 4), Kale (Mar 4), Oregano (Mar 4), Parsley (Mar 4), Scallions (Mar 4), +9 more. Direct sow from: Arugula (Mar 18), Beets (Mar 18), Dill (Mar 18), Peas (Mar 18), Radish (Mar 18), Spinach (Mar 18). |
| April | Start indoors: Calendula (Apr 1), Cauliflower (Apr 1), Marigolds (Apr 1), Pepper (Apr 1), Basil (Apr 8), Tomato (Apr 8), +15 more. Direct sow from: Kohlrabi (Apr 1), Cilantro (Apr 15), Turnip (Apr 15), Carrots (Apr 22), Potatoes (Apr 29). Transplant from: Broccoli (Apr 15), Brussel Sprouts (Apr 15), Cabbage (Apr 15), Collards (Apr 15), Kale (Apr 15), Lettuce (Apr 15), +4 more. Plant: Strawberry (Apr 8). |
| May | Direct sow from: Sunflowers (May 13), Beans (May 20), Pole Beans (May 20). Transplant from: Bok Choy (May 6), Cauliflower (May 6), Cosmos (May 13), Lavender (May 13), Marigolds (May 13), Mint (May 13), +24 more. Last frost around May 13. Last sowing dates: Cantaloupe (May 29), Celery (May 29), Melons (May 29), Spaghetti Squash (May 31). |
| June | Transplant from: Basil (Jun 3). Last sowing dates: Tomato (Jun 3), Watermelon (Jun 3), Pepper (Jun 8), Tomatillos (Jun 8), Eggplant (Jun 13), Corn (Jun 15), +1 more. |
| July | Last sowing dates: Brussel Sprouts (Jul 2), Pole Beans (Jul 2), Basil (Jul 7), Cosmos (Jul 7), Cucumber (Jul 7), Zinnias (Jul 7), +10 more. |
| August | Last sowing dates: Cabbage (Aug 1), Carrots (Aug 1), Beets (Aug 2), Dill (Aug 2), Swiss Chard (Aug 2), Calendula (Aug 7), +10 more. |
| September | Last sowing dates: Radish (Sep 1). |
| October | Direct sow from: Garlic (Oct 3). First frost around October 3. Last sowing dates: Garlic (Oct 24). |
| 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. |
Frequently Asked Questions
What is the last frost date for Spokane, WA (ZIP 99208)?
The median last spring frost date for Spokane, WA (ZIP code 99208) 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. One year in ten frost ends before April 18; one in ten it runs past June 7.
What is the first fall frost date in Spokane, WA?
The median first fall frost date for Spokane, 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. The first frost arrives around September 19 in the earliest one-in-ten years, so cover tomatoes and peppers from then.
How long is the growing season in Spokane, WA?
The frost-free growing season in Spokane 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. In Spokane (143 frost-free days, a moderate season), 38 of 56 planner crops fit outright, 17 get two plantings, 1 crop is perennial.
What USDA hardiness zone is Spokane, WA?
Spokane, WA is in USDA hardiness zone 6b (2023 USDA Plant Hardiness Zone Map). Zones come from the average coldest winter temperature, so they tell you which perennials survive the winter; the frost dates on this page tell you when to plant.
When should I start tomatoes indoors in Spokane, WA?
Start tomatoes indoors Apr 8 and plant out May 27 in Spokane. The planner uses the local median last frost and this crop's indoor-start and transplant offsets.
How many plantings of lettuce fit in Spokane?
Two: plant Apr 15 and again by Aug 12; both mature before Oct 10.
When do I plant garlic in Spokane?
Oct 3 to Oct 24; it overwinters and is ready the following summer.
Which nearby ZIP has a longer season?
Spokane (ZIP 99217) has 150 frost-free days, 7 more than Spokane (ZIP 99208). See Spokane ZIP 99217 frost dates
Nearby and related
- Frost dates for Spokane, WA 99205 (5.8 mi)
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