Frost Dates for Blaine, WA 98230
Last spring frost April 19 · First fall frost October 18 · 182 frost-free days · USDA Zone 8b
ZIP 98230 has about 18,700 people.
Long season: 182 frost-free days. Spring frost risk spans March 31–May 4 (34 days). Fall frost risk spans October 4–November 3 (30 days).
Frost probability for 98230
| Frost | 10% | 50% | 90% |
|---|---|---|---|
| Spring (last frost) | May 4 | April 19 | March 31 |
| Fall (first frost) | October 4 | October 18 | November 3 |
Dates come from NOAA 1971–2000 freeze probabilities at BLAINE (6.6 km away); the 50% date is the median year.
Which crops fit a 182-day season in Blaine
In Blaine (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 15 | May 3–May 10 | 140 | fits: 80 days to maturity, 140 available after May 3. | Jun 18 |
| Pepper | Mar 8 | May 3–May 10 | 140 | fits: 75 days to maturity, 140 available after May 3. | Jun 23 |
| Lettuce | Feb 22 | Mar 22–Mar 29 | 217 | two-plantings: Plant Mar 22 and again by Aug 27; both mature before Oct 25. | Aug 27 |
| Carrots | — | Mar 29–Apr 5 | 224 | fits: 70 days to maturity, 224 available after Mar 29. | Aug 16 |
| Cucumber | Mar 29 | May 3–May 10 | 154 | two-plantings: Plant May 3 and again by Jul 22; both mature before Oct 4. | Jul 22 |
| Beans | — | Apr 26–May 10 | 168 | two-plantings: Plant Apr 26 and again by Jul 29; both mature before Oct 11. | Jul 29 |
| Peas | — | Feb 22–May 3 | 245 | fits: 65 days to maturity, 245 available after Feb 22. | Aug 7 |
| Zucchini | Apr 5 | May 3–May 10 | 154 | two-plantings: Plant May 3 and again by Jul 27; both mature before Oct 4. | Jul 27 |
| Onion | Jan 25 | Mar 22–Apr 5 | 217 | fits: 100 days to maturity, 217 available after Mar 22. | — |
| Spinach | — | Feb 22–Apr 12 | 259 | two-plantings: Plant Feb 22 and again by Sep 15; both mature before Nov 8. | Sep 15 |
| Kale | Feb 8 | Mar 22–Apr 5 | 231 | two-plantings: Plant Mar 22 and again by Aug 31; both mature before Nov 8. | Aug 31 |
| Broccoli | Feb 22 | Mar 22–Apr 5 | 217 | fits: 80 days to maturity, 217 available after Mar 22. | Jul 23 |
| Cabbage | Feb 22 | Mar 22–Apr 5 | 231 | fits: 70 days to maturity, 231 available after Mar 22. | Aug 16 |
| Radish | — | Feb 22–May 17 | 245 | two-plantings: Plant Feb 22 and again by Sep 16; both mature before Oct 25. | Sep 16 |
| Beets | — | Feb 22–May 17 | 245 | two-plantings: Plant Feb 22 and again by Aug 17; both mature before Oct 25. | Aug 17 |
| Potatoes | — | Apr 5–Apr 12 | 203 | fits: 90 days to maturity, 203 available after Apr 5. | — |
| Garlic | — | Oct 18 | 287 | overwinter: Plant Oct 18 to Nov 8; harvest the following summer. | Nov 8 |
| Strawberry | — | Mar 15–May 10 | 238 | perennial: A perennial: plant Mar 15; it fruits from the following year and keeps producing for several years. | — |
| Corn | Mar 22 | Apr 26–May 3 | 154 | fits: 75 days to maturity, 154 available after Apr 26. | Jun 30 |
| Pumpkin | Apr 5 | May 3–May 3 | 147 | fits: 100 days to maturity, 147 available after May 3. | Jun 5 |
| Cauliflower | Mar 8 | Apr 12–Apr 26 | 196 | fits: 75 days to maturity, 196 available after Apr 12. | Jul 28 |
| Swiss Chard | Feb 22 | Apr 5–Apr 5 | 203 | two-plantings: Plant Apr 5 and again by Aug 17; both mature before Oct 25. | Aug 17 |
| Arugula | — | Feb 22–May 17 | 259 | two-plantings: Plant Feb 22 and again by Sep 15; both mature before Nov 8. | Sep 15 |
| Brussel Sprouts | Feb 22 | Mar 22–Apr 5 | 231 | fits: 100 days to maturity, 231 available after Mar 22. | Jul 17 |
| Butternut Squash | Apr 5 | May 3–May 10 | 147 | fits: 100 days to maturity, 147 available after May 3. | Jun 5 |
| Eggplant | Mar 1 | May 3–May 10 | 140 | fits: 70 days to maturity, 140 available after May 3. | Jun 28 |
| Okra | Mar 22 | Apr 26–May 3 | 161 | two-plantings: Plant Apr 26 and again by Jul 27; both mature before Oct 4. | Jul 27 |
| Basil | Mar 15 | May 10–May 10 | 147 | two-plantings: Plant May 10 and again by Jul 22; both mature before Oct 4. | Jul 22 |
| Cilantro | — | Mar 22–Apr 12 | 217 | two-plantings: Plant Mar 22 and again by Aug 22; both mature before Oct 25. | Aug 22 |
| Parsley | Feb 8 | Apr 26–May 3 | 182 | fits: 70 days to maturity, 182 available after Apr 26. | Aug 2 |
| Celery | Feb 8 | Apr 26–May 10 | 182 | fits: 120 days to maturity, 182 available after Apr 26. | Jun 13 |
| Scallions | Feb 8 | Mar 22–Apr 5 | 231 | two-plantings: Plant Mar 22 and again by Aug 26; both mature before Nov 8. | Aug 26 |
| Turnip | — | Mar 22–Apr 5 | 231 | two-plantings: Plant Mar 22 and again by Sep 5; both mature before Nov 8. | Sep 5 |
| Kohlrabi | — | Mar 8–Mar 22 | 245 | two-plantings: Plant Mar 8 and again by Aug 31; both mature before Nov 8. | Aug 31 |
| Bok Choy | Mar 22 | Apr 12–Apr 19 | 196 | two-plantings: Plant Apr 12 and again by Aug 27; both mature before Oct 25. | Aug 27 |
| Collards | Feb 8 | Mar 22–Apr 5 | 231 | two-plantings: Plant Mar 22 and again by Aug 26; both mature before Nov 8. | Aug 26 |
| Cantaloupe | Apr 5 | May 3–May 10 | 140 | fits: 85 days to maturity, 140 available after May 3. | Jun 13 |
| Chives | Jan 25 | Apr 26–May 3 | 196 | fits: 90 days to maturity, 196 available after Apr 26. | — |
| Dill | — | Feb 22–May 17 | 245 | two-plantings: Plant Feb 22 and again by Aug 17; both mature before Oct 25. | Aug 17 |
| Oregano | Feb 8 | Apr 26–May 3 | 196 | fits: 80 days to maturity, 196 available after Apr 26. | — |
| Rosemary | Jan 25 | Apr 26–May 3 | 182 | fits: 80 days to maturity, 182 available after Apr 26. | — |
| Sage | Feb 22 | Apr 26–May 3 | 196 | fits: 75 days to maturity, 196 available after Apr 26. | — |
| Thyme | Feb 8 | Apr 26–May 3 | 196 | fits: 90 days to maturity, 196 available after Apr 26. | — |
| Calendula | Mar 8 | Apr 5–Apr 19 | 203 | two-plantings: Plant Apr 5 and again by Aug 22; both mature before Oct 25. | Aug 22 |
| Cosmos | Mar 22 | Apr 19–May 3 | 168 | two-plantings: Plant Apr 19 and again by Jul 22; both mature before Oct 4. | Jul 22 |
| Lavender | Jan 25 | Apr 19–May 3 | 203 | fits: 90 days to maturity, 203 available after Apr 19. | — |
| Marigolds | Mar 8 | Apr 19–Apr 26 | 168 | two-plantings: Plant Apr 19 and again by Aug 1; both mature before Oct 4. | Aug 1 |
| Melons | Apr 5 | May 3–May 10 | 140 | fits: 85 days to maturity, 140 available after May 3. | Jun 13 |
| Mint | — | Apr 19–May 3 | 203 | fits: 90 days to maturity, 203 available after Apr 19. | — |
| Nasturtiums | Mar 22 | Apr 19–Apr 26 | 168 | two-plantings: Plant Apr 19 and again by Jul 27; both mature before Oct 4. | Jul 27 |
| Pole Beans | — | Apr 26–May 10 | 161 | fits: 65 days to maturity, 161 available after Apr 26. | Jul 17 |
| Spaghetti Squash | Apr 5 | May 3–May 10 | 147 | fits: 90 days to maturity, 147 available after May 3. | Jun 15 |
| Sunflowers | — | Apr 19–May 3 | 168 | fits: 70 days to maturity, 168 available after Apr 19. | Jul 12 |
| Tomatillos | Feb 22 | Apr 26–May 3 | 147 | fits: 75 days to maturity, 147 available after Apr 26. | Jun 23 |
| Watermelon | Apr 5 | Apr 26–May 3 | 147 | fits: 80 days to maturity, 147 available after Apr 26. | Jun 18 |
| Yellow Squash | Apr 5 | May 3–May 10 | 154 | two-plantings: Plant May 3 and again by Jul 27; both mature before Oct 4. | Jul 27 |
| Zinnias | Mar 22 | Apr 19–May 3 | 168 | two-plantings: Plant Apr 19 and again by Jul 22; both mature before Oct 4. | Jul 22 |
Month by month in Blaine
| Month | What to do |
|---|---|
| January | Start indoors: Chives (Jan 25), Lavender (Jan 25), Onion (Jan 25), Rosemary (Jan 25). |
| February | Start indoors: Celery (Feb 8), Collards (Feb 8), Kale (Feb 8), Oregano (Feb 8), Parsley (Feb 8), Scallions (Feb 8), +8 more. Direct sow from: Arugula (Feb 22), Beets (Feb 22), Dill (Feb 22), Peas (Feb 22), Radish (Feb 22), Spinach (Feb 22). |
| March | Start indoors: Eggplant (Mar 1), Calendula (Mar 8), Cauliflower (Mar 8), Marigolds (Mar 8), Pepper (Mar 8), Basil (Mar 15), +8 more. Direct sow from: Kohlrabi (Mar 8), Cilantro (Mar 22), Turnip (Mar 22), Carrots (Mar 29). Transplant from: Broccoli (Mar 22), Brussel Sprouts (Mar 22), Cabbage (Mar 22), Collards (Mar 22), Kale (Mar 22), Lettuce (Mar 22), +2 more. Plant: Strawberry (Mar 15). |
| April | Start indoors: Butternut Squash (Apr 5), Cantaloupe (Apr 5), Melons (Apr 5), Pumpkin (Apr 5), Spaghetti Squash (Apr 5), Watermelon (Apr 5), +2 more. Direct sow from: Potatoes (Apr 5), Sunflowers (Apr 19), Beans (Apr 26), Pole Beans (Apr 26). Transplant from: Calendula (Apr 5), Swiss Chard (Apr 5), Bok Choy (Apr 12), Cauliflower (Apr 12), Cosmos (Apr 19), Lavender (Apr 19), +15 more. Last frost around April 19. |
| May | Transplant from: Butternut Squash (May 3), Cantaloupe (May 3), Cucumber (May 3), Eggplant (May 3), Melons (May 3), Pepper (May 3), +6 more. |
| June | Last sowing dates: Butternut Squash (Jun 5), Pumpkin (Jun 5), Cantaloupe (Jun 13), Celery (Jun 13), Melons (Jun 13), Spaghetti Squash (Jun 15), +6 more. |
| July | Last sowing dates: Sunflowers (Jul 12), Brussel Sprouts (Jul 17), Pole Beans (Jul 17), Basil (Jul 22), Cosmos (Jul 22), Cucumber (Jul 22), +8 more. |
| August | Last sowing dates: Marigolds (Aug 1), Parsley (Aug 2), Peas (Aug 7), Cabbage (Aug 16), Carrots (Aug 16), Beets (Aug 17), +10 more. |
| September | Last sowing dates: Turnip (Sep 5), Arugula (Sep 15), Spinach (Sep 15), Radish (Sep 16). |
| October | Direct sow from: Garlic (Oct 18). First frost around October 18. |
| November | Last sowing dates: Garlic (Nov 8). |
| 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 Blaine, WA (ZIP 98230)?
The median last spring frost date for Blaine, WA (ZIP code 98230) is around April 19. 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 31; one in ten it runs past May 4.
What is the first fall frost date in Blaine, WA?
The median first fall frost date for Blaine, WA is around October 18. 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 4 in the earliest one-in-ten years, so cover tomatoes and peppers from then.
How long is the growing season in Blaine, WA?
The frost-free growing season in Blaine 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 Blaine (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 Blaine, WA?
Blaine, 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 Blaine, WA?
Start tomatoes indoors Mar 15 and plant out May 3 in Blaine. The planner uses the local median last frost and this crop's indoor-start and transplant offsets.
How many plantings of lettuce fit in Blaine?
Two: plant Mar 22 and again by Aug 27; both mature before Oct 25.
When do I plant garlic in Blaine?
Oct 18 to Nov 8; it overwinters and is ready the following summer.
Can I get two tomato crops in Blaine?
Yes: plant out May 3 for a summer crop, and set out a second round of transplants by Jun 18 for a fall crop.
Which nearby ZIP has a longer season?
Bellingham (ZIP 98225) has 196 frost-free days, 14 more than Blaine (ZIP 98230). See Bellingham ZIP 98225 frost dates
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