Frost Dates for Brentwood, CA 94513
Last spring frost February 6 · First fall frost December 3 · 300 frost-free days · USDA Zone 9b
ZIP 94513 has about 69,800 people.
Very long season: 300 frost-free days. Spring frost risk spans December 29–March 13 (74 days). Fall frost risk spans November 11–December 25 (44 days).
Frost probability for 94513
| Frost | 10% | 50% | 90% |
|---|---|---|---|
| Spring (last frost) | March 13 | February 6 | December 29 |
| Fall (first frost) | November 11 | December 3 | December 25 |
Dates come from NOAA 1971–2000 freeze probabilities at ANTIOCH PUMPING PLT #3 (8.8 km away); the 50% date is the median year.
Which crops fit a 300-day season in Brentwood
In Brentwood (300 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 2 | Feb 20–Feb 27 | 258 | fits: 80 days to maturity, 258 available after Feb 20. | Aug 3 |
| Pepper | Dec 26 | Feb 20–Feb 27 | 258 | fits: 75 days to maturity, 258 available after Feb 20. | Aug 8 |
| Lettuce | Dec 12 | Jan 9–Jan 16 | 335 | two-plantings: Plant Jan 9 and again by Oct 12; both mature before Dec 10. | Oct 12 |
| Carrots | — | Jan 16–Jan 23 | 342 | fits: 70 days to maturity, 342 available after Jan 16. | Oct 1 |
| Cucumber | Jan 16 | Feb 20–Feb 27 | 272 | two-plantings: Plant Feb 20 and again by Sep 6; both mature before Nov 19. | Sep 6 |
| Beans | — | Feb 13–Feb 27 | 286 | two-plantings: Plant Feb 13 and again by Sep 13; both mature before Nov 26. | Sep 13 |
| Peas | — | Dec 12–Feb 20 | 363 | fits: 65 days to maturity, 363 available after Dec 12. | Sep 22 |
| Zucchini | Jan 23 | Feb 20–Feb 27 | 272 | two-plantings: Plant Feb 20 and again by Sep 11; both mature before Nov 19. | Sep 11 |
| Onion | Nov 14 | Jan 9–Jan 23 | 335 | fits: 100 days to maturity, 335 available after Jan 9. | — |
| Spinach | — | Dec 12–Jan 30 | 377 | two-plantings: Plant Dec 12 and again by Oct 31; both mature before Dec 24. | Oct 31 |
| Kale | Nov 28 | Jan 9–Jan 23 | 349 | two-plantings: Plant Jan 9 and again by Oct 16; both mature before Dec 24. | Oct 16 |
| Broccoli | Dec 12 | Jan 9–Jan 23 | 335 | fits: 80 days to maturity, 335 available after Jan 9. | Sep 7 |
| Cabbage | Dec 12 | Jan 9–Jan 23 | 349 | fits: 70 days to maturity, 349 available after Jan 9. | Oct 1 |
| Radish | — | Dec 12–Mar 6 | 363 | two-plantings: Plant Dec 12 and again by Nov 1; both mature before Dec 10. | Nov 1 |
| Beets | — | Dec 12–Mar 6 | 363 | two-plantings: Plant Dec 12 and again by Oct 2; both mature before Dec 10. | Oct 2 |
| Potatoes | — | Jan 23–Jan 30 | 321 | fits: 90 days to maturity, 321 available after Jan 23. | — |
| Garlic | — | Dec 3 | 405 | overwinter: Plant Dec 3 to Dec 24; harvest the following summer. | Dec 24 |
| Strawberry | — | Jan 2–Feb 27 | 356 | perennial: A perennial: plant Jan 2; it fruits from the following year and keeps producing for several years. | — |
| Corn | Jan 9 | Feb 13–Feb 20 | 272 | fits: 75 days to maturity, 272 available after Feb 13. | Aug 15 |
| Pumpkin | Jan 23 | Feb 20–Feb 20 | 265 | fits: 100 days to maturity, 265 available after Feb 20. | Jul 21 |
| Cauliflower | Dec 26 | Jan 30–Feb 13 | 314 | fits: 75 days to maturity, 314 available after Jan 30. | Sep 12 |
| Swiss Chard | Dec 12 | Jan 23–Jan 23 | 321 | two-plantings: Plant Jan 23 and again by Oct 2; both mature before Dec 10. | Oct 2 |
| Arugula | — | Dec 12–Mar 6 | 377 | two-plantings: Plant Dec 12 and again by Oct 31; both mature before Dec 24. | Oct 31 |
| Brussel Sprouts | Dec 12 | Jan 9–Jan 23 | 349 | fits: 100 days to maturity, 349 available after Jan 9. | Sep 1 |
| Butternut Squash | Jan 23 | Feb 20–Feb 27 | 265 | fits: 100 days to maturity, 265 available after Feb 20. | Jul 21 |
| Eggplant | Dec 19 | Feb 20–Feb 27 | 258 | fits: 70 days to maturity, 258 available after Feb 20. | Aug 13 |
| Okra | Jan 9 | Feb 13–Feb 20 | 279 | two-plantings: Plant Feb 13 and again by Sep 11; both mature before Nov 19. | Sep 11 |
| Basil | Jan 2 | Feb 27–Feb 27 | 265 | two-plantings: Plant Feb 27 and again by Sep 6; both mature before Nov 19. | Sep 6 |
| Cilantro | — | Jan 9–Jan 30 | 335 | two-plantings: Plant Jan 9 and again by Oct 7; both mature before Dec 10. | Oct 7 |
| Parsley | Nov 28 | Feb 13–Feb 20 | 300 | fits: 70 days to maturity, 300 available after Feb 13. | Sep 17 |
| Celery | Nov 28 | Feb 13–Feb 27 | 300 | fits: 120 days to maturity, 300 available after Feb 13. | Jul 29 |
| Scallions | Nov 28 | Jan 9–Jan 23 | 349 | two-plantings: Plant Jan 9 and again by Oct 11; both mature before Dec 24. | Oct 11 |
| Turnip | — | Jan 9–Jan 23 | 349 | two-plantings: Plant Jan 9 and again by Oct 21; both mature before Dec 24. | Oct 21 |
| Kohlrabi | — | Dec 26–Jan 9 | 363 | two-plantings: Plant Dec 26 and again by Oct 16; both mature before Dec 24. | Oct 16 |
| Bok Choy | Jan 9 | Jan 30–Feb 6 | 314 | two-plantings: Plant Jan 30 and again by Oct 12; both mature before Dec 10. | Oct 12 |
| Collards | Nov 28 | Jan 9–Jan 23 | 349 | two-plantings: Plant Jan 9 and again by Oct 11; both mature before Dec 24. | Oct 11 |
| Cantaloupe | Jan 23 | Feb 20–Feb 27 | 258 | fits: 85 days to maturity, 258 available after Feb 20. | Jul 29 |
| Chives | Nov 14 | Feb 13–Feb 20 | 314 | fits: 90 days to maturity, 314 available after Feb 13. | — |
| Dill | — | Dec 12–Mar 6 | 363 | two-plantings: Plant Dec 12 and again by Oct 2; both mature before Dec 10. | Oct 2 |
| Oregano | Nov 28 | Feb 13–Feb 20 | 314 | fits: 80 days to maturity, 314 available after Feb 13. | — |
| Rosemary | Nov 14 | Feb 13–Feb 20 | 300 | fits: 80 days to maturity, 300 available after Feb 13. | — |
| Sage | Dec 12 | Feb 13–Feb 20 | 314 | fits: 75 days to maturity, 314 available after Feb 13. | — |
| Thyme | Nov 28 | Feb 13–Feb 20 | 314 | fits: 90 days to maturity, 314 available after Feb 13. | — |
| Calendula | Dec 26 | Jan 23–Feb 6 | 321 | two-plantings: Plant Jan 23 and again by Oct 7; both mature before Dec 10. | Oct 7 |
| Cosmos | Jan 9 | Feb 6–Feb 20 | 286 | two-plantings: Plant Feb 6 and again by Sep 6; both mature before Nov 19. | Sep 6 |
| Lavender | Nov 14 | Feb 6–Feb 20 | 321 | fits: 90 days to maturity, 321 available after Feb 6. | — |
| Marigolds | Dec 26 | Feb 6–Feb 13 | 286 | two-plantings: Plant Feb 6 and again by Sep 16; both mature before Nov 19. | Sep 16 |
| Melons | Jan 23 | Feb 20–Feb 27 | 258 | fits: 85 days to maturity, 258 available after Feb 20. | Jul 29 |
| Mint | — | Feb 6–Feb 20 | 321 | fits: 90 days to maturity, 321 available after Feb 6. | — |
| Nasturtiums | Jan 9 | Feb 6–Feb 13 | 286 | two-plantings: Plant Feb 6 and again by Sep 11; both mature before Nov 19. | Sep 11 |
| Pole Beans | — | Feb 13–Feb 27 | 279 | fits: 65 days to maturity, 279 available after Feb 13. | Sep 1 |
| Spaghetti Squash | Jan 23 | Feb 20–Feb 27 | 265 | fits: 90 days to maturity, 265 available after Feb 20. | Jul 31 |
| Sunflowers | — | Feb 6–Feb 20 | 286 | fits: 70 days to maturity, 286 available after Feb 6. | Aug 27 |
| Tomatillos | Dec 12 | Feb 13–Feb 20 | 265 | fits: 75 days to maturity, 265 available after Feb 13. | Aug 8 |
| Watermelon | Jan 23 | Feb 13–Feb 20 | 265 | fits: 80 days to maturity, 265 available after Feb 13. | Aug 3 |
| Yellow Squash | Jan 23 | Feb 20–Feb 27 | 272 | two-plantings: Plant Feb 20 and again by Sep 11; both mature before Nov 19. | Sep 11 |
| Zinnias | Jan 9 | Feb 6–Feb 20 | 286 | two-plantings: Plant Feb 6 and again by Sep 6; both mature before Nov 19. | Sep 6 |
Month by month in Brentwood
| Month | What to do |
|---|---|
| January | Start indoors: Basil (Jan 2), Tomato (Jan 2), Bok Choy (Jan 9), Corn (Jan 9), Cosmos (Jan 9), Nasturtiums (Jan 9), +11 more. Direct sow from: Cilantro (Jan 9), Turnip (Jan 9), Carrots (Jan 16), Potatoes (Jan 23). Transplant from: Broccoli (Jan 9), Brussel Sprouts (Jan 9), Cabbage (Jan 9), Collards (Jan 9), Kale (Jan 9), Lettuce (Jan 9), +6 more. Plant: Strawberry (Jan 2). |
| February | Direct sow from: Sunflowers (Feb 6), Beans (Feb 13), Pole Beans (Feb 13). Transplant from: Cosmos (Feb 6), Lavender (Feb 6), Marigolds (Feb 6), Mint (Feb 6), Nasturtiums (Feb 6), Zinnias (Feb 6), +23 more. Last frost around February 6. |
| March | Frost has passed. Transplant tomatoes, peppers, and basil outdoors. Direct sow beans, cucumbers, squash, and zucchini. |
| 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 21), Pumpkin (Jul 21), Cantaloupe (Jul 29), Celery (Jul 29), Melons (Jul 29), Spaghetti Squash (Jul 31). |
| August | Last sowing dates: Tomato (Aug 3), Watermelon (Aug 3), Pepper (Aug 8), Tomatillos (Aug 8), Eggplant (Aug 13), Corn (Aug 15), +1 more. |
| September | Last sowing dates: Brussel Sprouts (Sep 1), Pole Beans (Sep 1), Basil (Sep 6), Cosmos (Sep 6), Cucumber (Sep 6), Zinnias (Sep 6), +10 more. |
| October | Last sowing dates: Cabbage (Oct 1), Carrots (Oct 1), Beets (Oct 2), Dill (Oct 2), Swiss Chard (Oct 2), Calendula (Oct 7), +10 more. |
| November | Start indoors: Chives (Nov 14), Lavender (Nov 14), Onion (Nov 14), Rosemary (Nov 14), Celery (Nov 28), Collards (Nov 28), +5 more. Last sowing dates: Radish (Nov 1). |
| December | Start indoors: Broccoli (Dec 12), Brussel Sprouts (Dec 12), Cabbage (Dec 12), Lettuce (Dec 12), Sage (Dec 12), Swiss Chard (Dec 12), +6 more. Direct sow from: Garlic (Dec 3), Arugula (Dec 12), Beets (Dec 12), Dill (Dec 12), Peas (Dec 12), Radish (Dec 12), +2 more. First frost around December 3. Last sowing dates: Garlic (Dec 24). |
Frequently Asked Questions
What is the last frost date for Brentwood, CA (ZIP 94513)?
The median last spring frost date for Brentwood, CA (ZIP code 94513) is around February 6. 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 December 29; one in ten it runs past March 13.
What is the first fall frost date in Brentwood, CA?
The median first fall frost date for Brentwood, CA is around December 3. 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 11 in the earliest one-in-ten years, so cover tomatoes and peppers from then.
How long is the growing season in Brentwood, CA?
The frost-free growing season in Brentwood is about 300 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 Brentwood (300 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 Brentwood, CA?
Brentwood, 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 Brentwood, CA?
Start tomatoes indoors Jan 2 and plant out Feb 20 in Brentwood. The planner uses the local median last frost and this crop's indoor-start and transplant offsets.
How many plantings of lettuce fit in Brentwood?
Two: plant Jan 9 and again by Oct 12; both mature before Dec 10.
When do I plant garlic in Brentwood?
Dec 3 to Dec 24; it overwinters and is ready the following summer.
Can I get two tomato crops in Brentwood?
Yes: plant out Feb 20 for a summer crop, and set out a second round of transplants by Aug 3 for a fall crop.
Which nearby ZIP has a longer season?
Antioch (ZIP 94509) has 310 frost-free days, 10 more than Brentwood (ZIP 94513). See Antioch ZIP 94509 frost dates
Nearby and related
- Frost dates for Oakley, CA 94561 (4.7 mi)
- Frost dates for Discovery Bay, CA 94505 (6.7 mi)
- Frost dates for Antioch, CA 94509 (8.4 mi)
- Frost dates for Clayton, CA 94517 (11 mi)
- Frost dates for Pittsburg, CA 94565 (14.5 mi)
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