Frost Dates for Fairfield, CA 94534
Last spring frost February 22 · First fall frost December 5 · 286 frost-free days · USDA Zone 9b
ZIP 94534 has about 41,200 people, one of 2 ZIP codes in Fairfield.
Very long season: 286 frost-free days. Spring frost risk spans January 17–April 6 (79 days). Fall frost risk spans November 6–January 5 (60 days).
Frost probability for 94534
| Frost | 10% | 50% | 90% |
|---|---|---|---|
| Spring (last frost) | April 6 | February 22 | January 17 |
| Fall (first frost) | November 6 | December 5 | January 5 |
Dates come from NOAA 1971–2000 freeze probabilities at NAPA STATE HOSPITAL (13.2 km away); the 50% date is the median year.
Which crops fit a 286-day season in Fairfield
In Fairfield (286 frost-free days, a very 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 | Jan 18 | Mar 8–Mar 15 | 244 | fits: 80 days to maturity, 244 available after Mar 8. | Aug 5 |
| Pepper | Jan 11 | Mar 8–Mar 15 | 244 | fits: 75 days to maturity, 244 available after Mar 8. | Aug 10 |
| Lettuce | Dec 28 | Jan 25–Feb 1 | 321 | two-plantings: Plant Jan 25 and again by Oct 14; both mature before Dec 12. | Oct 14 |
| Carrots | — | Feb 1–Feb 8 | 328 | fits: 70 days to maturity, 328 available after Feb 1. | Oct 3 |
| Cucumber | Feb 1 | Mar 8–Mar 15 | 258 | two-plantings: Plant Mar 8 and again by Sep 8; both mature before Nov 21. | Sep 8 |
| Beans | — | Mar 1–Mar 15 | 272 | two-plantings: Plant Mar 1 and again by Sep 15; both mature before Nov 28. | Sep 15 |
| Peas | — | Dec 28–Mar 8 | 349 | fits: 65 days to maturity, 349 available after Dec 28. | Sep 24 |
| Zucchini | Feb 8 | Mar 8–Mar 15 | 258 | two-plantings: Plant Mar 8 and again by Sep 13; both mature before Nov 21. | Sep 13 |
| Onion | Nov 30 | Jan 25–Feb 8 | 321 | fits: 100 days to maturity, 321 available after Jan 25. | — |
| Spinach | — | Dec 28–Feb 15 | 363 | two-plantings: Plant Dec 28 and again by Nov 2; both mature before Dec 26. | Nov 2 |
| Kale | Dec 14 | Jan 25–Feb 8 | 335 | two-plantings: Plant Jan 25 and again by Oct 18; both mature before Dec 26. | Oct 18 |
| Broccoli | Dec 28 | Jan 25–Feb 8 | 321 | fits: 80 days to maturity, 321 available after Jan 25. | Sep 9 |
| Cabbage | Dec 28 | Jan 25–Feb 8 | 335 | fits: 70 days to maturity, 335 available after Jan 25. | Oct 3 |
| Radish | — | Dec 28–Mar 22 | 349 | two-plantings: Plant Dec 28 and again by Nov 3; both mature before Dec 12. | Nov 3 |
| Beets | — | Dec 28–Mar 22 | 349 | two-plantings: Plant Dec 28 and again by Oct 4; both mature before Dec 12. | Oct 4 |
| Potatoes | — | Feb 8–Feb 15 | 307 | fits: 90 days to maturity, 307 available after Feb 8. | — |
| Garlic | — | Dec 5 | 391 | overwinter: Plant Dec 5 to Dec 26; harvest the following summer. | Dec 26 |
| Strawberry | — | Jan 18–Mar 15 | 342 | perennial: A perennial: plant Jan 18; it fruits from the following year and keeps producing for several years. | — |
| Corn | Jan 25 | Mar 1–Mar 8 | 258 | fits: 75 days to maturity, 258 available after Mar 1. | Aug 17 |
| Pumpkin | Feb 8 | Mar 8–Mar 8 | 251 | fits: 100 days to maturity, 251 available after Mar 8. | Jul 23 |
| Cauliflower | Jan 11 | Feb 15–Mar 1 | 300 | fits: 75 days to maturity, 300 available after Feb 15. | Sep 14 |
| Swiss Chard | Dec 28 | Feb 8–Feb 8 | 307 | two-plantings: Plant Feb 8 and again by Oct 4; both mature before Dec 12. | Oct 4 |
| Arugula | — | Dec 28–Mar 22 | 363 | two-plantings: Plant Dec 28 and again by Nov 2; both mature before Dec 26. | Nov 2 |
| Brussel Sprouts | Dec 28 | Jan 25–Feb 8 | 335 | fits: 100 days to maturity, 335 available after Jan 25. | Sep 3 |
| Butternut Squash | Feb 8 | Mar 8–Mar 15 | 251 | fits: 100 days to maturity, 251 available after Mar 8. | Jul 23 |
| Eggplant | Jan 4 | Mar 8–Mar 15 | 244 | fits: 70 days to maturity, 244 available after Mar 8. | Aug 15 |
| Okra | Jan 25 | Mar 1–Mar 8 | 265 | two-plantings: Plant Mar 1 and again by Sep 13; both mature before Nov 21. | Sep 13 |
| Basil | Jan 18 | Mar 15–Mar 15 | 251 | two-plantings: Plant Mar 15 and again by Sep 8; both mature before Nov 21. | Sep 8 |
| Cilantro | — | Jan 25–Feb 15 | 321 | two-plantings: Plant Jan 25 and again by Oct 9; both mature before Dec 12. | Oct 9 |
| Parsley | Dec 14 | Mar 1–Mar 8 | 286 | fits: 70 days to maturity, 286 available after Mar 1. | Sep 19 |
| Celery | Dec 14 | Mar 1–Mar 15 | 286 | fits: 120 days to maturity, 286 available after Mar 1. | Jul 31 |
| Scallions | Dec 14 | Jan 25–Feb 8 | 335 | two-plantings: Plant Jan 25 and again by Oct 13; both mature before Dec 26. | Oct 13 |
| Turnip | — | Jan 25–Feb 8 | 335 | two-plantings: Plant Jan 25 and again by Oct 23; both mature before Dec 26. | Oct 23 |
| Kohlrabi | — | Jan 11–Jan 25 | 349 | two-plantings: Plant Jan 11 and again by Oct 18; both mature before Dec 26. | Oct 18 |
| Bok Choy | Jan 25 | Feb 15–Feb 22 | 300 | two-plantings: Plant Feb 15 and again by Oct 14; both mature before Dec 12. | Oct 14 |
| Collards | Dec 14 | Jan 25–Feb 8 | 335 | two-plantings: Plant Jan 25 and again by Oct 13; both mature before Dec 26. | Oct 13 |
| Cantaloupe | Feb 8 | Mar 8–Mar 15 | 244 | fits: 85 days to maturity, 244 available after Mar 8. | Jul 31 |
| Chives | Nov 30 | Mar 1–Mar 8 | 300 | fits: 90 days to maturity, 300 available after Mar 1. | — |
| Dill | — | Dec 28–Mar 22 | 349 | two-plantings: Plant Dec 28 and again by Oct 4; both mature before Dec 12. | Oct 4 |
| Oregano | Dec 14 | Mar 1–Mar 8 | 300 | fits: 80 days to maturity, 300 available after Mar 1. | — |
| Rosemary | Nov 30 | Mar 1–Mar 8 | 286 | fits: 80 days to maturity, 286 available after Mar 1. | — |
| Sage | Dec 28 | Mar 1–Mar 8 | 300 | fits: 75 days to maturity, 300 available after Mar 1. | — |
| Thyme | Dec 14 | Mar 1–Mar 8 | 300 | fits: 90 days to maturity, 300 available after Mar 1. | — |
| Calendula | Jan 11 | Feb 8–Feb 22 | 307 | two-plantings: Plant Feb 8 and again by Oct 9; both mature before Dec 12. | Oct 9 |
| Cosmos | Jan 25 | Feb 22–Mar 8 | 272 | two-plantings: Plant Feb 22 and again by Sep 8; both mature before Nov 21. | Sep 8 |
| Lavender | Nov 30 | Feb 22–Mar 8 | 307 | fits: 90 days to maturity, 307 available after Feb 22. | — |
| Marigolds | Jan 11 | Feb 22–Mar 1 | 272 | two-plantings: Plant Feb 22 and again by Sep 18; both mature before Nov 21. | Sep 18 |
| Melons | Feb 8 | Mar 8–Mar 15 | 244 | fits: 85 days to maturity, 244 available after Mar 8. | Jul 31 |
| Mint | — | Feb 22–Mar 8 | 307 | fits: 90 days to maturity, 307 available after Feb 22. | — |
| Nasturtiums | Jan 25 | Feb 22–Mar 1 | 272 | two-plantings: Plant Feb 22 and again by Sep 13; both mature before Nov 21. | Sep 13 |
| Pole Beans | — | Mar 1–Mar 15 | 265 | fits: 65 days to maturity, 265 available after Mar 1. | Sep 3 |
| Spaghetti Squash | Feb 8 | Mar 8–Mar 15 | 251 | fits: 90 days to maturity, 251 available after Mar 8. | Aug 2 |
| Sunflowers | — | Feb 22–Mar 8 | 272 | fits: 70 days to maturity, 272 available after Feb 22. | Aug 29 |
| Tomatillos | Dec 28 | Mar 1–Mar 8 | 251 | fits: 75 days to maturity, 251 available after Mar 1. | Aug 10 |
| Watermelon | Feb 8 | Mar 1–Mar 8 | 251 | fits: 80 days to maturity, 251 available after Mar 1. | Aug 5 |
| Yellow Squash | Feb 8 | Mar 8–Mar 15 | 258 | two-plantings: Plant Mar 8 and again by Sep 13; both mature before Nov 21. | Sep 13 |
| Zinnias | Jan 25 | Feb 22–Mar 8 | 272 | two-plantings: Plant Feb 22 and again by Sep 8; both mature before Nov 21. | Sep 8 |
Month by month in Fairfield
| Month | What to do |
|---|---|
| January | Start indoors: Eggplant (Jan 4), Calendula (Jan 11), Cauliflower (Jan 11), Marigolds (Jan 11), Pepper (Jan 11), Basil (Jan 18), +7 more. Direct sow from: Kohlrabi (Jan 11), Cilantro (Jan 25), Turnip (Jan 25). Transplant from: Broccoli (Jan 25), Brussel Sprouts (Jan 25), Cabbage (Jan 25), Collards (Jan 25), Kale (Jan 25), Lettuce (Jan 25), +2 more. Plant: Strawberry (Jan 18). |
| February | Start indoors: Cucumber (Feb 1), Butternut Squash (Feb 8), Cantaloupe (Feb 8), Melons (Feb 8), Pumpkin (Feb 8), Spaghetti Squash (Feb 8), +3 more. Direct sow from: Carrots (Feb 1), Potatoes (Feb 8), Sunflowers (Feb 22). Transplant from: Calendula (Feb 8), Swiss Chard (Feb 8), Bok Choy (Feb 15), Cauliflower (Feb 15), Cosmos (Feb 22), Lavender (Feb 22), +4 more. Last frost around February 22. |
| March | Direct sow from: Beans (Mar 1), Pole Beans (Mar 1). Transplant from: Celery (Mar 1), Chives (Mar 1), Corn (Mar 1), Okra (Mar 1), Oregano (Mar 1), Parsley (Mar 1), +17 more. |
| April | Succession plant lettuce and greens. Keep beds weeded and watered consistently. |
| May | Harvest regularly to encourage production. Monitor for pests and disease. |
| June | Midsummer: harvest beans, zucchini, cucumbers. Start brassica seeds indoors for fall. |
| July | Last sowing dates: Butternut Squash (Jul 23), Pumpkin (Jul 23), Cantaloupe (Jul 31), Celery (Jul 31), Melons (Jul 31). |
| August | Last sowing dates: Spaghetti Squash (Aug 2), Tomato (Aug 5), Watermelon (Aug 5), Pepper (Aug 10), Tomatillos (Aug 10), Eggplant (Aug 15), +2 more. |
| September | Last sowing dates: Brussel Sprouts (Sep 3), Pole Beans (Sep 3), Basil (Sep 8), Cosmos (Sep 8), Cucumber (Sep 8), Zinnias (Sep 8), +10 more. |
| October | Last sowing dates: Cabbage (Oct 3), Carrots (Oct 3), Beets (Oct 4), Dill (Oct 4), Swiss Chard (Oct 4), Calendula (Oct 9), +8 more. |
| November | Start indoors: Chives (Nov 30), Lavender (Nov 30), Onion (Nov 30), Rosemary (Nov 30). Last sowing dates: Arugula (Nov 2), Spinach (Nov 2), Radish (Nov 3). |
| December | Start indoors: Celery (Dec 14), Collards (Dec 14), Kale (Dec 14), Oregano (Dec 14), Parsley (Dec 14), Scallions (Dec 14), +8 more. Direct sow from: Garlic (Dec 5), Arugula (Dec 28), Beets (Dec 28), Dill (Dec 28), Peas (Dec 28), Radish (Dec 28), +1 more. First frost around December 5. Last sowing dates: Garlic (Dec 26). |
Frequently Asked Questions
What is the last frost date for Fairfield, CA (ZIP 94534)?
The median last spring frost date for Fairfield, CA (ZIP code 94534) is around February 22. 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 January 17; one in ten it runs past April 6.
What is the first fall frost date in Fairfield, CA?
The median first fall frost date for Fairfield, CA is around December 5. 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 November 6 in the earliest one-in-ten years, so cover tomatoes and peppers from then.
How long is the growing season in Fairfield, CA?
The frost-free growing season in Fairfield is about 286 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 Fairfield (286 frost-free days, a very long season), 30 of 56 planner crops fit outright, 25 get two plantings, 1 crop is perennial.
What USDA hardiness zone is Fairfield, CA?
Fairfield, CA is in USDA hardiness zone 9b (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 Fairfield, CA?
Start tomatoes indoors Jan 18 and plant out Mar 8 in Fairfield. The planner uses the local median last frost and this crop's indoor-start and transplant offsets.
How many plantings of lettuce fit in Fairfield?
Two: plant Jan 25 and again by Oct 14; both mature before Dec 12.
When do I plant garlic in Fairfield?
Dec 5 to Dec 26; it overwinters and is ready the following summer.
Can I get two tomato crops in Fairfield?
Yes: plant out Mar 8 for a summer crop, and set out a second round of transplants by Aug 5 for a fall crop.
Which nearby ZIP has a longer season?
American Canyon (ZIP 94503) has 302 frost-free days, 16 more than Fairfield (ZIP 94534). See American Canyon ZIP 94503 frost dates
Nearby and related
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