Frost Dates for Bonney Lake, WA 98391
Last spring frost April 21 · First fall frost October 20 · 182 frost-free days · USDA Zone 8b
ZIP 98391 has about 59,200 people.
Long season: 182 frost-free days. Spring frost risk spans March 30–May 13 (44 days). Fall frost risk spans October 5–November 5 (31 days).
Frost probability for 98391
| Frost | 10% | 50% | 90% |
|---|---|---|---|
| Spring (last frost) | May 13 | April 21 | March 30 |
| Fall (first frost) | October 5 | October 20 | November 5 |
Dates come from NOAA 1971–2000 freeze probabilities at MCMILLIN RSVR (7.7 km away); the 50% date is the median year.
Which crops fit a 182-day season in Bonney Lake
In Bonney Lake (182 frost-free days, a long season), 30 of 56 planner crops fit outright, 25 get two plantings, 1 crop is perennial.
| Crop | Start indoors | Plant out / sow | Days you have | Verdict | Last sow date |
|---|---|---|---|---|---|
| Tomato | Mar 17 | May 5–May 12 | 140 | fits: 80 days to maturity, 140 available after May 5. | Jun 20 |
| Pepper | Mar 10 | May 5–May 12 | 140 | fits: 75 days to maturity, 140 available after May 5. | Jun 25 |
| Lettuce | Feb 24 | Mar 24–Mar 31 | 217 | two-plantings: Plant Mar 24 and again by Aug 29; both mature before Oct 27. | Aug 29 |
| Carrots | — | Mar 31–Apr 7 | 224 | fits: 70 days to maturity, 224 available after Mar 31. | Aug 18 |
| Cucumber | Mar 31 | May 5–May 12 | 154 | two-plantings: Plant May 5 and again by Jul 24; both mature before Oct 6. | Jul 24 |
| Beans | — | Apr 28–May 12 | 168 | two-plantings: Plant Apr 28 and again by Jul 31; both mature before Oct 13. | Jul 31 |
| Peas | — | Feb 24–May 5 | 245 | fits: 65 days to maturity, 245 available after Feb 24. | Aug 9 |
| Zucchini | Apr 7 | May 5–May 12 | 154 | two-plantings: Plant May 5 and again by Jul 29; both mature before Oct 6. | Jul 29 |
| Onion | Jan 27 | Mar 24–Apr 7 | 217 | fits: 100 days to maturity, 217 available after Mar 24. | — |
| Spinach | — | Feb 24–Apr 14 | 259 | two-plantings: Plant Feb 24 and again by Sep 17; both mature before Nov 10. | Sep 17 |
| Kale | Feb 10 | Mar 24–Apr 7 | 231 | two-plantings: Plant Mar 24 and again by Sep 2; both mature before Nov 10. | Sep 2 |
| Broccoli | Feb 24 | Mar 24–Apr 7 | 217 | fits: 80 days to maturity, 217 available after Mar 24. | Jul 25 |
| Cabbage | Feb 24 | Mar 24–Apr 7 | 231 | fits: 70 days to maturity, 231 available after Mar 24. | Aug 18 |
| Radish | — | Feb 24–May 19 | 245 | two-plantings: Plant Feb 24 and again by Sep 18; both mature before Oct 27. | Sep 18 |
| Beets | — | Feb 24–May 19 | 245 | two-plantings: Plant Feb 24 and again by Aug 19; both mature before Oct 27. | Aug 19 |
| Potatoes | — | Apr 7–Apr 14 | 203 | fits: 90 days to maturity, 203 available after Apr 7. | — |
| Garlic | — | Oct 20 | 287 | overwinter: Plant Oct 20 to Nov 10; harvest the following summer. | Nov 10 |
| Strawberry | — | Mar 17–May 12 | 238 | perennial: A perennial: plant Mar 17; it fruits from the following year and keeps producing for several years. | — |
| Corn | Mar 24 | Apr 28–May 5 | 154 | fits: 75 days to maturity, 154 available after Apr 28. | Jul 2 |
| Pumpkin | Apr 7 | May 5–May 5 | 147 | fits: 100 days to maturity, 147 available after May 5. | Jun 7 |
| Cauliflower | Mar 10 | Apr 14–Apr 28 | 196 | fits: 75 days to maturity, 196 available after Apr 14. | Jul 30 |
| Swiss Chard | Feb 24 | Apr 7–Apr 7 | 203 | two-plantings: Plant Apr 7 and again by Aug 19; both mature before Oct 27. | Aug 19 |
| Arugula | — | Feb 24–May 19 | 259 | two-plantings: Plant Feb 24 and again by Sep 17; both mature before Nov 10. | Sep 17 |
| Brussel Sprouts | Feb 24 | Mar 24–Apr 7 | 231 | fits: 100 days to maturity, 231 available after Mar 24. | Jul 19 |
| Butternut Squash | Apr 7 | May 5–May 12 | 147 | fits: 100 days to maturity, 147 available after May 5. | Jun 7 |
| Eggplant | Mar 3 | May 5–May 12 | 140 | fits: 70 days to maturity, 140 available after May 5. | Jun 30 |
| Okra | Mar 24 | Apr 28–May 5 | 161 | two-plantings: Plant Apr 28 and again by Jul 29; both mature before Oct 6. | Jul 29 |
| Basil | Mar 17 | May 12–May 12 | 147 | two-plantings: Plant May 12 and again by Jul 24; both mature before Oct 6. | Jul 24 |
| Cilantro | — | Mar 24–Apr 14 | 217 | two-plantings: Plant Mar 24 and again by Aug 24; both mature before Oct 27. | Aug 24 |
| Parsley | Feb 10 | Apr 28–May 5 | 182 | fits: 70 days to maturity, 182 available after Apr 28. | Aug 4 |
| Celery | Feb 10 | Apr 28–May 12 | 182 | fits: 120 days to maturity, 182 available after Apr 28. | Jun 15 |
| Scallions | Feb 10 | Mar 24–Apr 7 | 231 | two-plantings: Plant Mar 24 and again by Aug 28; both mature before Nov 10. | Aug 28 |
| Turnip | — | Mar 24–Apr 7 | 231 | two-plantings: Plant Mar 24 and again by Sep 7; both mature before Nov 10. | Sep 7 |
| Kohlrabi | — | Mar 10–Mar 24 | 245 | two-plantings: Plant Mar 10 and again by Sep 2; both mature before Nov 10. | Sep 2 |
| Bok Choy | Mar 24 | Apr 14–Apr 21 | 196 | two-plantings: Plant Apr 14 and again by Aug 29; both mature before Oct 27. | Aug 29 |
| Collards | Feb 10 | Mar 24–Apr 7 | 231 | two-plantings: Plant Mar 24 and again by Aug 28; both mature before Nov 10. | Aug 28 |
| Cantaloupe | Apr 7 | May 5–May 12 | 140 | fits: 85 days to maturity, 140 available after May 5. | Jun 15 |
| Chives | Jan 27 | Apr 28–May 5 | 196 | fits: 90 days to maturity, 196 available after Apr 28. | — |
| Dill | — | Feb 24–May 19 | 245 | two-plantings: Plant Feb 24 and again by Aug 19; both mature before Oct 27. | Aug 19 |
| Oregano | Feb 10 | Apr 28–May 5 | 196 | fits: 80 days to maturity, 196 available after Apr 28. | — |
| Rosemary | Jan 27 | Apr 28–May 5 | 182 | fits: 80 days to maturity, 182 available after Apr 28. | — |
| Sage | Feb 24 | Apr 28–May 5 | 196 | fits: 75 days to maturity, 196 available after Apr 28. | — |
| Thyme | Feb 10 | Apr 28–May 5 | 196 | fits: 90 days to maturity, 196 available after Apr 28. | — |
| Calendula | Mar 10 | Apr 7–Apr 21 | 203 | two-plantings: Plant Apr 7 and again by Aug 24; both mature before Oct 27. | Aug 24 |
| Cosmos | Mar 24 | Apr 21–May 5 | 168 | two-plantings: Plant Apr 21 and again by Jul 24; both mature before Oct 6. | Jul 24 |
| Lavender | Jan 27 | Apr 21–May 5 | 203 | fits: 90 days to maturity, 203 available after Apr 21. | — |
| Marigolds | Mar 10 | Apr 21–Apr 28 | 168 | two-plantings: Plant Apr 21 and again by Aug 3; both mature before Oct 6. | Aug 3 |
| Melons | Apr 7 | May 5–May 12 | 140 | fits: 85 days to maturity, 140 available after May 5. | Jun 15 |
| Mint | — | Apr 21–May 5 | 203 | fits: 90 days to maturity, 203 available after Apr 21. | — |
| Nasturtiums | Mar 24 | Apr 21–Apr 28 | 168 | two-plantings: Plant Apr 21 and again by Jul 29; both mature before Oct 6. | Jul 29 |
| Pole Beans | — | Apr 28–May 12 | 161 | fits: 65 days to maturity, 161 available after Apr 28. | Jul 19 |
| Spaghetti Squash | Apr 7 | May 5–May 12 | 147 | fits: 90 days to maturity, 147 available after May 5. | Jun 17 |
| Sunflowers | — | Apr 21–May 5 | 168 | fits: 70 days to maturity, 168 available after Apr 21. | Jul 14 |
| Tomatillos | Feb 24 | Apr 28–May 5 | 147 | fits: 75 days to maturity, 147 available after Apr 28. | Jun 25 |
| Watermelon | Apr 7 | Apr 28–May 5 | 147 | fits: 80 days to maturity, 147 available after Apr 28. | Jun 20 |
| Yellow Squash | Apr 7 | May 5–May 12 | 154 | two-plantings: Plant May 5 and again by Jul 29; both mature before Oct 6. | Jul 29 |
| Zinnias | Mar 24 | Apr 21–May 5 | 168 | two-plantings: Plant Apr 21 and again by Jul 24; both mature before Oct 6. | Jul 24 |
Month by month in Bonney Lake
| Month | What to do |
|---|---|
| January | Start indoors: Chives (Jan 27), Lavender (Jan 27), Onion (Jan 27), Rosemary (Jan 27). |
| February | Start indoors: Celery (Feb 10), Collards (Feb 10), Kale (Feb 10), Oregano (Feb 10), Parsley (Feb 10), Scallions (Feb 10), +8 more. Direct sow from: Arugula (Feb 24), Beets (Feb 24), Dill (Feb 24), Peas (Feb 24), Radish (Feb 24), Spinach (Feb 24). |
| March | Start indoors: Eggplant (Mar 3), Calendula (Mar 10), Cauliflower (Mar 10), Marigolds (Mar 10), Pepper (Mar 10), Basil (Mar 17), +8 more. Direct sow from: Kohlrabi (Mar 10), Cilantro (Mar 24), Turnip (Mar 24), Carrots (Mar 31). Transplant from: Broccoli (Mar 24), Brussel Sprouts (Mar 24), Cabbage (Mar 24), Collards (Mar 24), Kale (Mar 24), Lettuce (Mar 24), +2 more. Plant: Strawberry (Mar 17). |
| April | Start indoors: Butternut Squash (Apr 7), Cantaloupe (Apr 7), Melons (Apr 7), Pumpkin (Apr 7), Spaghetti Squash (Apr 7), Watermelon (Apr 7), +2 more. Direct sow from: Potatoes (Apr 7), Sunflowers (Apr 21), Beans (Apr 28), Pole Beans (Apr 28). Transplant from: Calendula (Apr 7), Swiss Chard (Apr 7), Bok Choy (Apr 14), Cauliflower (Apr 14), Cosmos (Apr 21), Lavender (Apr 21), +15 more. Last frost around April 21. |
| May | Transplant from: Butternut Squash (May 5), Cantaloupe (May 5), Cucumber (May 5), Eggplant (May 5), Melons (May 5), Pepper (May 5), +6 more. |
| June | Last sowing dates: Butternut Squash (Jun 7), Pumpkin (Jun 7), Cantaloupe (Jun 15), Celery (Jun 15), Melons (Jun 15), Spaghetti Squash (Jun 17), +5 more. |
| July | Last sowing dates: Corn (Jul 2), Sunflowers (Jul 14), Brussel Sprouts (Jul 19), Pole Beans (Jul 19), Basil (Jul 24), Cosmos (Jul 24), +9 more. |
| August | Last sowing dates: Marigolds (Aug 3), Parsley (Aug 4), Peas (Aug 9), Cabbage (Aug 18), Carrots (Aug 18), Beets (Aug 19), +8 more. |
| September | Last sowing dates: Kale (Sep 2), Kohlrabi (Sep 2), Turnip (Sep 7), Arugula (Sep 17), Spinach (Sep 17), Radish (Sep 18). |
| October | Direct sow from: Garlic (Oct 20). First frost around October 20. |
| November | Last sowing dates: Garlic (Nov 10). |
| 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 Bonney Lake, WA (ZIP 98391)?
The median last spring frost date for Bonney Lake, WA (ZIP code 98391) is around April 21. 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 March 30; one in ten it runs past May 13.
What is the first fall frost date in Bonney Lake, WA?
The median first fall frost date for Bonney Lake, WA is around October 20. 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 October 5 in the earliest one-in-ten years, so cover tomatoes and peppers from then.
How long is the growing season in Bonney Lake, WA?
The frost-free growing season in Bonney Lake is about 182 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 Bonney Lake (182 frost-free days, a long season), 30 of 56 planner crops fit outright, 25 get two plantings, 1 crop is perennial.
What USDA hardiness zone is Bonney Lake, WA?
Bonney Lake, WA is in USDA hardiness zone 8b (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 Bonney Lake, WA?
Start tomatoes indoors Mar 17 and plant out May 5 in Bonney Lake. The planner uses the local median last frost and this crop's indoor-start and transplant offsets.
How many plantings of lettuce fit in Bonney Lake?
Two: plant Mar 24 and again by Aug 29; both mature before Oct 27.
When do I plant garlic in Bonney Lake?
Oct 20 to Nov 10; it overwinters and is ready the following summer.
Can I get two tomato crops in Bonney Lake?
Yes: plant out May 5 for a summer crop, and set out a second round of transplants by Jun 20 for a fall crop.
Which nearby ZIP has a longer season?
Puyallup (ZIP 98372) has 198 frost-free days, 16 more than Bonney Lake (ZIP 98391). See Puyallup ZIP 98372 frost dates
Nearby and related
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