Frost Dates for San Anselmo, CA 94960
Last spring frost January 24 · First fall frost January 2 · 343 frost-free days · USDA Zone 9b
ZIP 94960 has about 16,200 people.
Very long season: 343 frost-free days.
Frost probability for 94960
| Frost | 10% | 50% | 90% |
|---|---|---|---|
| Spring (last frost) | March 15 | January 24 | — |
| Fall (first frost) | November 19 | January 2 | — |
Dates come from NOAA 1971–2000 freeze probabilities at SAN RAFAEL-CIVIC CTR (3.6 km away); the 50% date is the median year.
Which crops fit a 343-day season in San Anselmo
In San Anselmo (343 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 | Dec 20 | Feb 7–Feb 14 | 301 | fits: 80 days to maturity, 301 available after Feb 7. | Sep 2 |
| Pepper | Dec 13 | Feb 7–Feb 14 | 301 | fits: 75 days to maturity, 301 available after Feb 7. | Sep 7 |
| Lettuce | Nov 29 | Dec 27–Jan 3 | 378 | two-plantings: Plant Dec 27 and again by Nov 11; both mature before Jan 9. | Nov 11 |
| Carrots | — | Jan 3–Jan 10 | 385 | fits: 70 days to maturity, 385 available after Jan 3. | Oct 31 |
| Cucumber | Jan 3 | Feb 7–Feb 14 | 315 | two-plantings: Plant Feb 7 and again by Oct 6; both mature before Dec 19. | Oct 6 |
| Beans | — | Jan 31–Feb 14 | 329 | two-plantings: Plant Jan 31 and again by Oct 13; both mature before Dec 26. | Oct 13 |
| Peas | — | Nov 29–Feb 7 | 406 | fits: 65 days to maturity, 406 available after Nov 29. | Oct 22 |
| Zucchini | Jan 10 | Feb 7–Feb 14 | 315 | two-plantings: Plant Feb 7 and again by Oct 11; both mature before Dec 19. | Oct 11 |
| Onion | Nov 1 | Dec 27–Jan 10 | 378 | fits: 100 days to maturity, 378 available after Dec 27. | — |
| Spinach | — | Nov 29–Jan 17 | 420 | two-plantings: Plant Nov 29 and again by Nov 30; both mature before Jan 23. | Nov 30 |
| Kale | Nov 15 | Dec 27–Jan 10 | 392 | two-plantings: Plant Dec 27 and again by Nov 15; both mature before Jan 23. | Nov 15 |
| Broccoli | Nov 29 | Dec 27–Jan 10 | 378 | fits: 80 days to maturity, 378 available after Dec 27. | Oct 7 |
| Cabbage | Nov 29 | Dec 27–Jan 10 | 392 | fits: 70 days to maturity, 392 available after Dec 27. | Oct 31 |
| Radish | — | Nov 29–Feb 21 | 406 | two-plantings: Plant Nov 29 and again by Dec 1; both mature before Jan 9. | Dec 1 |
| Beets | — | Nov 29–Feb 21 | 406 | two-plantings: Plant Nov 29 and again by Nov 1; both mature before Jan 9. | Nov 1 |
| Potatoes | — | Jan 10–Jan 17 | 364 | fits: 90 days to maturity, 364 available after Jan 10. | — |
| Garlic | — | Jan 2 | 448 | overwinter: Plant Jan 2 to Jan 23; harvest the following summer. | Jan 23 |
| Strawberry | — | Dec 20–Feb 14 | 399 | perennial: A perennial: plant Dec 20; it fruits from the following year and keeps producing for several years. | — |
| Corn | Dec 27 | Jan 31–Feb 7 | 315 | fits: 75 days to maturity, 315 available after Jan 31. | Sep 14 |
| Pumpkin | Jan 10 | Feb 7–Feb 7 | 308 | fits: 100 days to maturity, 308 available after Feb 7. | Aug 20 |
| Cauliflower | Dec 13 | Jan 17–Jan 31 | 357 | fits: 75 days to maturity, 357 available after Jan 17. | Oct 12 |
| Swiss Chard | Nov 29 | Jan 10–Jan 10 | 364 | two-plantings: Plant Jan 10 and again by Nov 1; both mature before Jan 9. | Nov 1 |
| Arugula | — | Nov 29–Feb 21 | 420 | two-plantings: Plant Nov 29 and again by Nov 30; both mature before Jan 23. | Nov 30 |
| Brussel Sprouts | Nov 29 | Dec 27–Jan 10 | 392 | fits: 100 days to maturity, 392 available after Dec 27. | Oct 1 |
| Butternut Squash | Jan 10 | Feb 7–Feb 14 | 308 | fits: 100 days to maturity, 308 available after Feb 7. | Aug 20 |
| Eggplant | Dec 6 | Feb 7–Feb 14 | 301 | fits: 70 days to maturity, 301 available after Feb 7. | Sep 12 |
| Okra | Dec 27 | Jan 31–Feb 7 | 322 | two-plantings: Plant Jan 31 and again by Oct 11; both mature before Dec 19. | Oct 11 |
| Basil | Dec 20 | Feb 14–Feb 14 | 308 | two-plantings: Plant Feb 14 and again by Oct 6; both mature before Dec 19. | Oct 6 |
| Cilantro | — | Dec 27–Jan 17 | 378 | two-plantings: Plant Dec 27 and again by Nov 6; both mature before Jan 9. | Nov 6 |
| Parsley | Nov 15 | Jan 31–Feb 7 | 343 | fits: 70 days to maturity, 343 available after Jan 31. | Oct 17 |
| Celery | Nov 15 | Jan 31–Feb 14 | 343 | fits: 120 days to maturity, 343 available after Jan 31. | Aug 28 |
| Scallions | Nov 15 | Dec 27–Jan 10 | 392 | two-plantings: Plant Dec 27 and again by Nov 10; both mature before Jan 23. | Nov 10 |
| Turnip | — | Dec 27–Jan 10 | 392 | two-plantings: Plant Dec 27 and again by Nov 20; both mature before Jan 23. | Nov 20 |
| Kohlrabi | — | Dec 13–Dec 27 | 406 | two-plantings: Plant Dec 13 and again by Nov 15; both mature before Jan 23. | Nov 15 |
| Bok Choy | Dec 27 | Jan 17–Jan 24 | 357 | two-plantings: Plant Jan 17 and again by Nov 11; both mature before Jan 9. | Nov 11 |
| Collards | Nov 15 | Dec 27–Jan 10 | 392 | two-plantings: Plant Dec 27 and again by Nov 10; both mature before Jan 23. | Nov 10 |
| Cantaloupe | Jan 10 | Feb 7–Feb 14 | 301 | fits: 85 days to maturity, 301 available after Feb 7. | Aug 28 |
| Chives | Nov 1 | Jan 31–Feb 7 | 357 | fits: 90 days to maturity, 357 available after Jan 31. | — |
| Dill | — | Nov 29–Feb 21 | 406 | two-plantings: Plant Nov 29 and again by Nov 1; both mature before Jan 9. | Nov 1 |
| Oregano | Nov 15 | Jan 31–Feb 7 | 357 | fits: 80 days to maturity, 357 available after Jan 31. | — |
| Rosemary | Nov 1 | Jan 31–Feb 7 | 343 | fits: 80 days to maturity, 343 available after Jan 31. | — |
| Sage | Nov 29 | Jan 31–Feb 7 | 357 | fits: 75 days to maturity, 357 available after Jan 31. | — |
| Thyme | Nov 15 | Jan 31–Feb 7 | 357 | fits: 90 days to maturity, 357 available after Jan 31. | — |
| Calendula | Dec 13 | Jan 10–Jan 24 | 364 | two-plantings: Plant Jan 10 and again by Nov 6; both mature before Jan 9. | Nov 6 |
| Cosmos | Dec 27 | Jan 24–Feb 7 | 329 | two-plantings: Plant Jan 24 and again by Oct 6; both mature before Dec 19. | Oct 6 |
| Lavender | Nov 1 | Jan 24–Feb 7 | 364 | fits: 90 days to maturity, 364 available after Jan 24. | — |
| Marigolds | Dec 13 | Jan 24–Jan 31 | 329 | two-plantings: Plant Jan 24 and again by Oct 16; both mature before Dec 19. | Oct 16 |
| Melons | Jan 10 | Feb 7–Feb 14 | 301 | fits: 85 days to maturity, 301 available after Feb 7. | Aug 28 |
| Mint | — | Jan 24–Feb 7 | 364 | fits: 90 days to maturity, 364 available after Jan 24. | — |
| Nasturtiums | Dec 27 | Jan 24–Jan 31 | 329 | two-plantings: Plant Jan 24 and again by Oct 11; both mature before Dec 19. | Oct 11 |
| Pole Beans | — | Jan 31–Feb 14 | 322 | fits: 65 days to maturity, 322 available after Jan 31. | Oct 1 |
| Spaghetti Squash | Jan 10 | Feb 7–Feb 14 | 308 | fits: 90 days to maturity, 308 available after Feb 7. | Aug 30 |
| Sunflowers | — | Jan 24–Feb 7 | 329 | fits: 70 days to maturity, 329 available after Jan 24. | Sep 26 |
| Tomatillos | Nov 29 | Jan 31–Feb 7 | 308 | fits: 75 days to maturity, 308 available after Jan 31. | Sep 7 |
| Watermelon | Jan 10 | Jan 31–Feb 7 | 308 | fits: 80 days to maturity, 308 available after Jan 31. | Sep 2 |
| Yellow Squash | Jan 10 | Feb 7–Feb 14 | 315 | two-plantings: Plant Feb 7 and again by Oct 11; both mature before Dec 19. | Oct 11 |
| Zinnias | Dec 27 | Jan 24–Feb 7 | 329 | two-plantings: Plant Jan 24 and again by Oct 6; both mature before Dec 19. | Oct 6 |
Month by month in San Anselmo
| Month | What to do |
|---|---|
| January | Start indoors: Cucumber (Jan 3), Butternut Squash (Jan 10), Cantaloupe (Jan 10), Melons (Jan 10), Pumpkin (Jan 10), Spaghetti Squash (Jan 10), +3 more. Direct sow from: Garlic (Jan 2), Carrots (Jan 3), Potatoes (Jan 10), Sunflowers (Jan 24), Beans (Jan 31), Pole Beans (Jan 31). Transplant from: Calendula (Jan 10), Swiss Chard (Jan 10), Bok Choy (Jan 17), Cauliflower (Jan 17), Cosmos (Jan 24), Lavender (Jan 24), +15 more. Last frost around January 24. First frost around January 2. Last sowing dates: Garlic (Jan 23). |
| February | Transplant from: Butternut Squash (Feb 7), Cantaloupe (Feb 7), Cucumber (Feb 7), Eggplant (Feb 7), Melons (Feb 7), Pepper (Feb 7), +6 more. |
| March | Transplant warm-season crops outdoors. Sow beans, cucumbers, and squash. |
| April | Main warm-season planting window. Direct sow melons and sweet corn. |
| May | Succession plant lettuce. Keep beds irrigated as temperatures climb. |
| June | Monitor for heat stress. Harvest zucchini and cucumbers frequently. |
| July | Harvest regularly to encourage continued production. Watch for pests. |
| August | Last sowing dates: Butternut Squash (Aug 20), Pumpkin (Aug 20), Cantaloupe (Aug 28), Celery (Aug 28), Melons (Aug 28), Spaghetti Squash (Aug 30). |
| September | Last sowing dates: Tomato (Sep 2), Watermelon (Sep 2), Pepper (Sep 7), Tomatillos (Sep 7), Eggplant (Sep 12), Corn (Sep 14), +1 more. |
| October | Last sowing dates: Brussel Sprouts (Oct 1), Pole Beans (Oct 1), Basil (Oct 6), Cosmos (Oct 6), Cucumber (Oct 6), Zinnias (Oct 6), +12 more. |
| November | Start indoors: Chives (Nov 1), Lavender (Nov 1), Onion (Nov 1), Rosemary (Nov 1), Celery (Nov 15), Collards (Nov 15), +12 more. Direct sow from: Arugula (Nov 29), Beets (Nov 29), Dill (Nov 29), Peas (Nov 29), Radish (Nov 29), Spinach (Nov 29). Last sowing dates: Beets (Nov 1), Dill (Nov 1), Swiss Chard (Nov 1), Calendula (Nov 6), Cilantro (Nov 6), Collards (Nov 10), +8 more. |
| December | Start indoors: Eggplant (Dec 6), Calendula (Dec 13), Cauliflower (Dec 13), Marigolds (Dec 13), Pepper (Dec 13), Basil (Dec 20), +7 more. Direct sow from: Kohlrabi (Dec 13), Cilantro (Dec 27), Turnip (Dec 27). Transplant from: Broccoli (Dec 27), Brussel Sprouts (Dec 27), Cabbage (Dec 27), Collards (Dec 27), Kale (Dec 27), Lettuce (Dec 27), +2 more. Plant: Strawberry (Dec 20). Last sowing dates: Radish (Dec 1). |
Frequently Asked Questions
What is the last frost date for San Anselmo, CA (ZIP 94960)?
The median last spring frost date for San Anselmo, CA (ZIP code 94960) is around January 24. 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.
What is the first fall frost date in San Anselmo, CA?
The median first fall frost date for San Anselmo, CA is around January 2. 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 19 in the earliest one-in-ten years, so cover tomatoes and peppers from then.
How long is the growing season in San Anselmo, CA?
The frost-free growing season in San Anselmo is about 343 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 San Anselmo (343 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 San Anselmo, CA?
San Anselmo, 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 San Anselmo, CA?
Start tomatoes indoors Dec 20 and plant out Feb 7 in San Anselmo. The planner uses the local median last frost and this crop's indoor-start and transplant offsets.
How many plantings of lettuce fit in San Anselmo?
Two: plant Dec 27 and again by Nov 11; both mature before Jan 9.
When do I plant garlic in San Anselmo?
Jan 2 to Jan 23; it overwinters and is ready the following summer.
Can I get two tomato crops in San Anselmo?
Yes: plant out Feb 7 for a summer crop, and set out a second round of transplants by Sep 2 for a fall crop.
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