Frost Dates for Othello, WA 99344
Last spring frost April 25 · First fall frost October 7 · 165 frost-free days · USDA Zone 7a
ZIP 99344 has about 19,500 people.
Moderate season: 165 frost-free days. Spring frost risk spans April 10–May 9 (29 days). Fall frost risk spans September 25–October 19 (24 days).
Frost probability for 99344
| Frost | 10% | 50% | 90% |
|---|---|---|---|
| Spring (last frost) | May 9 | April 25 | April 10 |
| Fall (first frost) | September 25 | October 7 | October 19 |
Dates come from NOAA 1971–2000 freeze probabilities at SMYRNA (37.4 km away); the 50% date is the median year.
Which crops fit a 165-day season in Othello
In Othello (165 frost-free days, a moderate season), 31 of 56 planner crops fit outright, 24 get two plantings, 1 crop is perennial.
| Crop | Start indoors | Plant out / sow | Days you have | Verdict | Last sow date |
|---|---|---|---|---|---|
| Tomato | Mar 21 | May 9–May 16 | 123 | fits: 80 days to maturity, 123 available after May 9. | Jun 7 |
| Pepper | Mar 14 | May 9–May 16 | 123 | fits: 75 days to maturity, 123 available after May 9. | Jun 12 |
| Lettuce | Feb 28 | Mar 28–Apr 4 | 200 | two-plantings: Plant Mar 28 and again by Aug 16; both mature before Oct 14. | Aug 16 |
| Carrots | — | Apr 4–Apr 11 | 207 | fits: 70 days to maturity, 207 available after Apr 4. | Aug 5 |
| Cucumber | Apr 4 | May 9–May 16 | 137 | two-plantings: Plant May 9 and again by Jul 11; both mature before Sep 23. | Jul 11 |
| Beans | — | May 2–May 16 | 151 | two-plantings: Plant May 2 and again by Jul 18; both mature before Sep 30. | Jul 18 |
| Peas | — | Feb 28–May 9 | 228 | fits: 65 days to maturity, 228 available after Feb 28. | Jul 27 |
| Zucchini | Apr 11 | May 9–May 16 | 137 | two-plantings: Plant May 9 and again by Jul 16; both mature before Sep 23. | Jul 16 |
| Onion | Jan 31 | Mar 28–Apr 11 | 200 | fits: 100 days to maturity, 200 available after Mar 28. | — |
| Spinach | — | Feb 28–Apr 18 | 242 | two-plantings: Plant Feb 28 and again by Sep 4; both mature before Oct 28. | Sep 4 |
| Kale | Feb 14 | Mar 28–Apr 11 | 214 | two-plantings: Plant Mar 28 and again by Aug 20; both mature before Oct 28. | Aug 20 |
| Broccoli | Feb 28 | Mar 28–Apr 11 | 200 | fits: 80 days to maturity, 200 available after Mar 28. | Jul 12 |
| Cabbage | Feb 28 | Mar 28–Apr 11 | 214 | fits: 70 days to maturity, 214 available after Mar 28. | Aug 5 |
| Radish | — | Feb 28–May 23 | 228 | two-plantings: Plant Feb 28 and again by Sep 5; both mature before Oct 14. | Sep 5 |
| Beets | — | Feb 28–May 23 | 228 | two-plantings: Plant Feb 28 and again by Aug 6; both mature before Oct 14. | Aug 6 |
| Potatoes | — | Apr 11–Apr 18 | 186 | fits: 90 days to maturity, 186 available after Apr 11. | — |
| Garlic | — | Oct 7 | 270 | overwinter: Plant Oct 7 to Oct 28; harvest the following summer. | Oct 28 |
| Strawberry | — | Mar 21–May 16 | 221 | perennial: A perennial: plant Mar 21; it fruits from the following year and keeps producing for several years. | — |
| Corn | Mar 28 | May 2–May 9 | 137 | fits: 75 days to maturity, 137 available after May 2. | Jun 19 |
| Pumpkin | Apr 11 | May 9–May 9 | 130 | fits: 100 days to maturity, 130 available after May 9. | May 25 |
| Cauliflower | Mar 14 | Apr 18–May 2 | 179 | fits: 75 days to maturity, 179 available after Apr 18. | Jul 17 |
| Swiss Chard | Feb 28 | Apr 11–Apr 11 | 186 | two-plantings: Plant Apr 11 and again by Aug 6; both mature before Oct 14. | Aug 6 |
| Arugula | — | Feb 28–May 23 | 242 | two-plantings: Plant Feb 28 and again by Sep 4; both mature before Oct 28. | Sep 4 |
| Brussel Sprouts | Feb 28 | Mar 28–Apr 11 | 214 | fits: 100 days to maturity, 214 available after Mar 28. | Jul 6 |
| Butternut Squash | Apr 11 | May 9–May 16 | 130 | fits: 100 days to maturity, 130 available after May 9. | May 25 |
| Eggplant | Mar 7 | May 9–May 16 | 123 | fits: 70 days to maturity, 123 available after May 9. | Jun 17 |
| Okra | Mar 28 | May 2–May 9 | 144 | two-plantings: Plant May 2 and again by Jul 16; both mature before Sep 23. | Jul 16 |
| Basil | Mar 21 | May 16–May 16 | 130 | fits: 60 days to maturity, 130 available after May 16. | Jul 11 |
| Cilantro | — | Mar 28–Apr 18 | 200 | two-plantings: Plant Mar 28 and again by Aug 11; both mature before Oct 14. | Aug 11 |
| Parsley | Feb 14 | May 2–May 9 | 165 | fits: 70 days to maturity, 165 available after May 2. | Jul 22 |
| Celery | Feb 14 | May 2–May 16 | 165 | fits: 120 days to maturity, 165 available after May 2. | Jun 2 |
| Scallions | Feb 14 | Mar 28–Apr 11 | 214 | two-plantings: Plant Mar 28 and again by Aug 15; both mature before Oct 28. | Aug 15 |
| Turnip | — | Mar 28–Apr 11 | 214 | two-plantings: Plant Mar 28 and again by Aug 25; both mature before Oct 28. | Aug 25 |
| Kohlrabi | — | Mar 14–Mar 28 | 228 | two-plantings: Plant Mar 14 and again by Aug 20; both mature before Oct 28. | Aug 20 |
| Bok Choy | Mar 28 | Apr 18–Apr 25 | 179 | two-plantings: Plant Apr 18 and again by Aug 16; both mature before Oct 14. | Aug 16 |
| Collards | Feb 14 | Mar 28–Apr 11 | 214 | two-plantings: Plant Mar 28 and again by Aug 15; both mature before Oct 28. | Aug 15 |
| Cantaloupe | Apr 11 | May 9–May 16 | 123 | fits: 85 days to maturity, 123 available after May 9. | Jun 2 |
| Chives | Jan 31 | May 2–May 9 | 179 | fits: 90 days to maturity, 179 available after May 2. | — |
| Dill | — | Feb 28–May 23 | 228 | two-plantings: Plant Feb 28 and again by Aug 6; both mature before Oct 14. | Aug 6 |
| Oregano | Feb 14 | May 2–May 9 | 179 | fits: 80 days to maturity, 179 available after May 2. | — |
| Rosemary | Jan 31 | May 2–May 9 | 165 | fits: 80 days to maturity, 165 available after May 2. | — |
| Sage | Feb 28 | May 2–May 9 | 179 | fits: 75 days to maturity, 179 available after May 2. | — |
| Thyme | Feb 14 | May 2–May 9 | 179 | fits: 90 days to maturity, 179 available after May 2. | — |
| Calendula | Mar 14 | Apr 11–Apr 25 | 186 | two-plantings: Plant Apr 11 and again by Aug 11; both mature before Oct 14. | Aug 11 |
| Cosmos | Mar 28 | Apr 25–May 9 | 151 | two-plantings: Plant Apr 25 and again by Jul 11; both mature before Sep 23. | Jul 11 |
| Lavender | Jan 31 | Apr 25–May 9 | 186 | fits: 90 days to maturity, 186 available after Apr 25. | — |
| Marigolds | Mar 14 | Apr 25–May 2 | 151 | two-plantings: Plant Apr 25 and again by Jul 21; both mature before Sep 23. | Jul 21 |
| Melons | Apr 11 | May 9–May 16 | 123 | fits: 85 days to maturity, 123 available after May 9. | Jun 2 |
| Mint | — | Apr 25–May 9 | 186 | fits: 90 days to maturity, 186 available after Apr 25. | — |
| Nasturtiums | Mar 28 | Apr 25–May 2 | 151 | two-plantings: Plant Apr 25 and again by Jul 16; both mature before Sep 23. | Jul 16 |
| Pole Beans | — | May 2–May 16 | 144 | fits: 65 days to maturity, 144 available after May 2. | Jul 6 |
| Spaghetti Squash | Apr 11 | May 9–May 16 | 130 | fits: 90 days to maturity, 130 available after May 9. | Jun 4 |
| Sunflowers | — | Apr 25–May 9 | 151 | fits: 70 days to maturity, 151 available after Apr 25. | Jul 1 |
| Tomatillos | Feb 28 | May 2–May 9 | 130 | fits: 75 days to maturity, 130 available after May 2. | Jun 12 |
| Watermelon | Apr 11 | May 2–May 9 | 130 | fits: 80 days to maturity, 130 available after May 2. | Jun 7 |
| Yellow Squash | Apr 11 | May 9–May 16 | 137 | two-plantings: Plant May 9 and again by Jul 16; both mature before Sep 23. | Jul 16 |
| Zinnias | Mar 28 | Apr 25–May 9 | 151 | two-plantings: Plant Apr 25 and again by Jul 11; both mature before Sep 23. | Jul 11 |
Month by month in Othello
| Month | What to do |
|---|---|
| January | Start indoors: Chives (Jan 31), Lavender (Jan 31), Onion (Jan 31), Rosemary (Jan 31). |
| February | Start indoors: Celery (Feb 14), Collards (Feb 14), Kale (Feb 14), Oregano (Feb 14), Parsley (Feb 14), Scallions (Feb 14), +8 more. Direct sow from: Arugula (Feb 28), Beets (Feb 28), Dill (Feb 28), Peas (Feb 28), Radish (Feb 28), Spinach (Feb 28). |
| March | Start indoors: Eggplant (Mar 7), Calendula (Mar 14), Cauliflower (Mar 14), Marigolds (Mar 14), Pepper (Mar 14), Basil (Mar 21), +7 more. Direct sow from: Kohlrabi (Mar 14), Cilantro (Mar 28), Turnip (Mar 28). Transplant from: Broccoli (Mar 28), Brussel Sprouts (Mar 28), Cabbage (Mar 28), Collards (Mar 28), Kale (Mar 28), Lettuce (Mar 28), +2 more. Plant: Strawberry (Mar 21). |
| April | Start indoors: Cucumber (Apr 4), Butternut Squash (Apr 11), Cantaloupe (Apr 11), Melons (Apr 11), Pumpkin (Apr 11), Spaghetti Squash (Apr 11), +3 more. Direct sow from: Carrots (Apr 4), Potatoes (Apr 11), Sunflowers (Apr 25). Transplant from: Calendula (Apr 11), Swiss Chard (Apr 11), Bok Choy (Apr 18), Cauliflower (Apr 18), Cosmos (Apr 25), Lavender (Apr 25), +4 more. Last frost around April 25. |
| May | Direct sow from: Beans (May 2), Pole Beans (May 2). Transplant from: Celery (May 2), Chives (May 2), Corn (May 2), Okra (May 2), Oregano (May 2), Parsley (May 2), +17 more. Last sowing dates: Butternut Squash (May 25), Pumpkin (May 25). |
| June | Last sowing dates: Cantaloupe (Jun 2), Celery (Jun 2), Melons (Jun 2), Spaghetti Squash (Jun 4), Tomato (Jun 7), Watermelon (Jun 7), +4 more. |
| July | Last sowing dates: Sunflowers (Jul 1), Brussel Sprouts (Jul 6), Pole Beans (Jul 6), Basil (Jul 11), Cosmos (Jul 11), Cucumber (Jul 11), +11 more. |
| August | Last sowing dates: Cabbage (Aug 5), Carrots (Aug 5), Beets (Aug 6), Dill (Aug 6), Swiss Chard (Aug 6), Calendula (Aug 11), +8 more. |
| September | Last sowing dates: Arugula (Sep 4), Spinach (Sep 4), Radish (Sep 5). |
| October | Direct sow from: Garlic (Oct 7). First frost around October 7. Last sowing dates: Garlic (Oct 28). |
| 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 Othello, WA (ZIP 99344)?
The median last spring frost date for Othello, WA (ZIP code 99344) is around April 25. 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 10; one in ten it runs past May 9.
What is the first fall frost date in Othello, WA?
The median first fall frost date for Othello, WA is around October 7. 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 25 in the earliest one-in-ten years, so cover tomatoes and peppers from then.
How long is the growing season in Othello, WA?
The frost-free growing season in Othello is about 165 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 Othello (165 frost-free days, a moderate season), 31 of 56 planner crops fit outright, 24 get two plantings, 1 crop is perennial.
What USDA hardiness zone is Othello, WA?
Othello, WA is in USDA hardiness zone 7a (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 Othello, WA?
Start tomatoes indoors Mar 21 and plant out May 9 in Othello. The planner uses the local median last frost and this crop's indoor-start and transplant offsets.
How many plantings of lettuce fit in Othello?
Two: plant Mar 28 and again by Aug 16; both mature before Oct 14.
When do I plant garlic in Othello?
Oct 7 to Oct 28; it overwinters and is ready the following summer.
Which nearby ZIP has a longer season?
Pasco (ZIP 99301) has 191 frost-free days, 26 more than Othello (ZIP 99344). See Pasco ZIP 99301 frost dates
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