Frost Dates for Toppenish, WA 98948
Last spring frost May 15 · First fall frost October 10 · 148 frost-free days · USDA Zone 7a
ZIP 98948 has about 12,600 people.
Moderate season: 148 frost-free days. Spring frost risk spans April 30–May 30 (30 days). Fall frost risk spans September 22–October 26 (34 days).
Frost probability for 98948
| Frost | 10% | 50% | 90% |
|---|---|---|---|
| Spring (last frost) | May 30 | May 15 | April 30 |
| Fall (first frost) | September 22 | October 10 | October 26 |
Dates come from NOAA 1971–2000 freeze probabilities at MOXEE CITY 10 E (34.3 km away); the 50% date is the median year.
Which crops fit a 148-day season in Toppenish
In Toppenish (148 frost-free days, a moderate season), 34 of 56 planner crops fit outright, 21 get two plantings, 1 crop is perennial.
| Crop | Start indoors | Plant out / sow | Days you have | Verdict | Last sow date |
|---|---|---|---|---|---|
| Tomato | Apr 10 | May 29–Jun 5 | 106 | fits: 80 days to maturity, 106 available after May 29. | Jun 10 |
| Pepper | Apr 3 | May 29–Jun 5 | 106 | fits: 75 days to maturity, 106 available after May 29. | Jun 15 |
| Lettuce | Mar 20 | Apr 17–Apr 24 | 183 | two-plantings: Plant Apr 17 and again by Aug 19; both mature before Oct 17. | Aug 19 |
| Carrots | — | Apr 24–May 1 | 190 | fits: 70 days to maturity, 190 available after Apr 24. | Aug 8 |
| Cucumber | Apr 24 | May 29–Jun 5 | 120 | fits: 60 days to maturity, 120 available after May 29. | Jul 14 |
| Beans | — | May 22–Jun 5 | 134 | two-plantings: Plant May 22 and again by Jul 21; both mature before Oct 3. | Jul 21 |
| Peas | — | Mar 20–May 29 | 211 | fits: 65 days to maturity, 211 available after Mar 20. | Jul 30 |
| Zucchini | May 1 | May 29–Jun 5 | 120 | fits: 55 days to maturity, 120 available after May 29. | Jul 19 |
| Onion | Feb 20 | Apr 17–May 1 | 183 | fits: 100 days to maturity, 183 available after Apr 17. | — |
| Spinach | — | Mar 20–May 8 | 225 | two-plantings: Plant Mar 20 and again by Sep 7; both mature before Oct 31. | Sep 7 |
| Kale | Mar 6 | Apr 17–May 1 | 197 | two-plantings: Plant Apr 17 and again by Aug 23; both mature before Oct 31. | Aug 23 |
| Broccoli | Mar 20 | Apr 17–May 1 | 183 | fits: 80 days to maturity, 183 available after Apr 17. | Jul 15 |
| Cabbage | Mar 20 | Apr 17–May 1 | 197 | fits: 70 days to maturity, 197 available after Apr 17. | Aug 8 |
| Radish | — | Mar 20–Jun 12 | 211 | two-plantings: Plant Mar 20 and again by Sep 8; both mature before Oct 17. | Sep 8 |
| Beets | — | Mar 20–Jun 12 | 211 | two-plantings: Plant Mar 20 and again by Aug 9; both mature before Oct 17. | Aug 9 |
| Potatoes | — | May 1–May 8 | 169 | fits: 90 days to maturity, 169 available after May 1. | — |
| Garlic | — | Oct 10 | 253 | overwinter: Plant Oct 10 to Oct 31; harvest the following summer. | Oct 31 |
| Strawberry | — | Apr 10–Jun 5 | 204 | perennial: A perennial: plant Apr 10; it fruits from the following year and keeps producing for several years. | — |
| Corn | Apr 17 | May 22–May 29 | 120 | fits: 75 days to maturity, 120 available after May 22. | Jun 22 |
| Pumpkin | May 1 | May 29–May 29 | 113 | fits: 100 days to maturity, 113 available after May 29. | — |
| Cauliflower | Apr 3 | May 8–May 22 | 162 | fits: 75 days to maturity, 162 available after May 8. | Jul 20 |
| Swiss Chard | Mar 20 | May 1–May 1 | 169 | two-plantings: Plant May 1 and again by Aug 9; both mature before Oct 17. | Aug 9 |
| Arugula | — | Mar 20–Jun 12 | 225 | two-plantings: Plant Mar 20 and again by Sep 7; both mature before Oct 31. | Sep 7 |
| Brussel Sprouts | Mar 20 | Apr 17–May 1 | 197 | fits: 100 days to maturity, 197 available after Apr 17. | Jul 9 |
| Butternut Squash | May 1 | May 29–Jun 5 | 113 | fits: 100 days to maturity, 113 available after May 29. | — |
| Eggplant | Mar 27 | May 29–Jun 5 | 106 | fits: 70 days to maturity, 106 available after May 29. | Jun 20 |
| Okra | Apr 17 | May 22–May 29 | 127 | two-plantings: Plant May 22 and again by Jul 19; both mature before Sep 26. | Jul 19 |
| Basil | Apr 10 | Jun 5–Jun 5 | 113 | fits: 60 days to maturity, 113 available after Jun 5. | Jul 14 |
| Cilantro | — | Apr 17–May 8 | 183 | two-plantings: Plant Apr 17 and again by Aug 14; both mature before Oct 17. | Aug 14 |
| Parsley | Mar 6 | May 22–May 29 | 148 | fits: 70 days to maturity, 148 available after May 22. | Jul 25 |
| Celery | Mar 6 | May 22–Jun 5 | 148 | fits: 120 days to maturity, 148 available after May 22. | Jun 5 |
| Scallions | Mar 6 | Apr 17–May 1 | 197 | two-plantings: Plant Apr 17 and again by Aug 18; both mature before Oct 31. | Aug 18 |
| Turnip | — | Apr 17–May 1 | 197 | two-plantings: Plant Apr 17 and again by Aug 28; both mature before Oct 31. | Aug 28 |
| Kohlrabi | — | Apr 3–Apr 17 | 211 | two-plantings: Plant Apr 3 and again by Aug 23; both mature before Oct 31. | Aug 23 |
| Bok Choy | Apr 17 | May 8–May 15 | 162 | two-plantings: Plant May 8 and again by Aug 19; both mature before Oct 17. | Aug 19 |
| Collards | Mar 6 | Apr 17–May 1 | 197 | two-plantings: Plant Apr 17 and again by Aug 18; both mature before Oct 31. | Aug 18 |
| Cantaloupe | May 1 | May 29–Jun 5 | 106 | fits: 85 days to maturity, 106 available after May 29. | Jun 5 |
| Chives | Feb 20 | May 22–May 29 | 162 | fits: 90 days to maturity, 162 available after May 22. | — |
| Dill | — | Mar 20–Jun 12 | 211 | two-plantings: Plant Mar 20 and again by Aug 9; both mature before Oct 17. | Aug 9 |
| Oregano | Mar 6 | May 22–May 29 | 162 | fits: 80 days to maturity, 162 available after May 22. | — |
| Rosemary | Feb 20 | May 22–May 29 | 148 | fits: 80 days to maturity, 148 available after May 22. | — |
| Sage | Mar 20 | May 22–May 29 | 162 | fits: 75 days to maturity, 162 available after May 22. | — |
| Thyme | Mar 6 | May 22–May 29 | 162 | fits: 90 days to maturity, 162 available after May 22. | — |
| Calendula | Apr 3 | May 1–May 15 | 169 | two-plantings: Plant May 1 and again by Aug 14; both mature before Oct 17. | Aug 14 |
| Cosmos | Apr 17 | May 15–May 29 | 134 | two-plantings: Plant May 15 and again by Jul 14; both mature before Sep 26. | Jul 14 |
| Lavender | Feb 20 | May 15–May 29 | 169 | fits: 90 days to maturity, 169 available after May 15. | — |
| Marigolds | Apr 3 | May 15–May 22 | 134 | two-plantings: Plant May 15 and again by Jul 24; both mature before Sep 26. | Jul 24 |
| Melons | May 1 | May 29–Jun 5 | 106 | fits: 85 days to maturity, 106 available after May 29. | Jun 5 |
| Mint | — | May 15–May 29 | 169 | fits: 90 days to maturity, 169 available after May 15. | — |
| Nasturtiums | Apr 17 | May 15–May 22 | 134 | two-plantings: Plant May 15 and again by Jul 19; both mature before Sep 26. | Jul 19 |
| Pole Beans | — | May 22–Jun 5 | 127 | fits: 65 days to maturity, 127 available after May 22. | Jul 9 |
| Spaghetti Squash | May 1 | May 29–Jun 5 | 113 | fits: 90 days to maturity, 113 available after May 29. | Jun 7 |
| Sunflowers | — | May 15–May 29 | 134 | fits: 70 days to maturity, 134 available after May 15. | Jul 4 |
| Tomatillos | Mar 20 | May 22–May 29 | 113 | fits: 75 days to maturity, 113 available after May 22. | Jun 15 |
| Watermelon | May 1 | May 22–May 29 | 113 | fits: 80 days to maturity, 113 available after May 22. | Jun 10 |
| Yellow Squash | May 1 | May 29–Jun 5 | 120 | fits: 55 days to maturity, 120 available after May 29. | Jul 19 |
| Zinnias | Apr 17 | May 15–May 29 | 134 | two-plantings: Plant May 15 and again by Jul 14; both mature before Sep 26. | Jul 14 |
Month by month in Toppenish
| Month | What to do |
|---|---|
| January | Plan your garden layout and order seeds. Research varieties suited to your frost dates. |
| February | Start indoors: Chives (Feb 20), Lavender (Feb 20), Onion (Feb 20), Rosemary (Feb 20). |
| March | Start indoors: Celery (Mar 6), Collards (Mar 6), Kale (Mar 6), Oregano (Mar 6), Parsley (Mar 6), Scallions (Mar 6), +9 more. Direct sow from: Arugula (Mar 20), Beets (Mar 20), Dill (Mar 20), Peas (Mar 20), Radish (Mar 20), Spinach (Mar 20). |
| April | Start indoors: Calendula (Apr 3), Cauliflower (Apr 3), Marigolds (Apr 3), Pepper (Apr 3), Basil (Apr 10), Tomato (Apr 10), +7 more. Direct sow from: Kohlrabi (Apr 3), Cilantro (Apr 17), Turnip (Apr 17), Carrots (Apr 24). Transplant from: Broccoli (Apr 17), Brussel Sprouts (Apr 17), Cabbage (Apr 17), Collards (Apr 17), Kale (Apr 17), Lettuce (Apr 17), +2 more. Plant: Strawberry (Apr 10). |
| May | Start indoors: Butternut Squash (May 1), Cantaloupe (May 1), Melons (May 1), Pumpkin (May 1), Spaghetti Squash (May 1), Watermelon (May 1), +2 more. Direct sow from: Potatoes (May 1), Sunflowers (May 15), Beans (May 22), Pole Beans (May 22). Transplant from: Calendula (May 1), Swiss Chard (May 1), Bok Choy (May 8), Cauliflower (May 8), Cosmos (May 15), Lavender (May 15), +26 more. Last frost around May 15. |
| June | Transplant from: Basil (Jun 5). Last sowing dates: Cantaloupe (Jun 5), Celery (Jun 5), Melons (Jun 5), Spaghetti Squash (Jun 7), Tomato (Jun 10), Watermelon (Jun 10), +4 more. |
| July | Last sowing dates: Sunflowers (Jul 4), Brussel Sprouts (Jul 9), Pole Beans (Jul 9), Basil (Jul 14), Cosmos (Jul 14), Cucumber (Jul 14), +11 more. |
| August | Last sowing dates: Cabbage (Aug 8), Carrots (Aug 8), Beets (Aug 9), Dill (Aug 9), Swiss Chard (Aug 9), Calendula (Aug 14), +8 more. |
| September | Last sowing dates: Arugula (Sep 7), Spinach (Sep 7), Radish (Sep 8). |
| October | Direct sow from: Garlic (Oct 10). First frost around October 10. Last sowing dates: Garlic (Oct 31). |
| 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 Toppenish, WA (ZIP 98948)?
The median last spring frost date for Toppenish, WA (ZIP code 98948) is around May 15. 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 30; one in ten it runs past May 30.
What is the first fall frost date in Toppenish, WA?
The median first fall frost date for Toppenish, WA is around October 10. 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 22 in the earliest one-in-ten years, so cover tomatoes and peppers from then.
How long is the growing season in Toppenish, WA?
The frost-free growing season in Toppenish is about 148 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 Toppenish (148 frost-free days, a moderate season), 34 of 56 planner crops fit outright, 21 get two plantings, 1 crop is perennial.
What USDA hardiness zone is Toppenish, WA?
Toppenish, 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 Toppenish, WA?
Start tomatoes indoors Apr 10 and plant out May 29 in Toppenish. The planner uses the local median last frost and this crop's indoor-start and transplant offsets.
How many plantings of lettuce fit in Toppenish?
Two: plant Apr 17 and again by Aug 19; both mature before Oct 17.
When do I plant garlic in Toppenish?
Oct 10 to Oct 31; it overwinters and is ready the following summer.
Which nearby ZIP has a longer season?
Grandview (ZIP 98930) has 164 frost-free days, 16 more than Toppenish (ZIP 98948). See Grandview ZIP 98930 frost dates
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