Frost Dates for Gridley, CA 95948
Last spring frost February 10 · First fall frost December 2 · 295 frost-free days · USDA Zone 9b
ZIP 95948 has about 11,200 people.
Very long season: 295 frost-free days. Spring frost risk spans December 21–April 3 (103 days). Fall frost risk spans November 2–January 2 (61 days).
Frost probability for 95948
| Frost | 10% | 50% | 90% |
|---|---|---|---|
| Spring (last frost) | April 3 | February 10 | December 21 |
| Fall (first frost) | November 2 | December 2 | January 2 |
Dates come from NOAA 1971–2000 freeze probabilities at OROVILLE (26.2 km away); the 50% date is the median year.
Which crops fit a 295-day season in Gridley
In Gridley (295 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 6 | Feb 24–Mar 3 | 253 | fits: 80 days to maturity, 253 available after Feb 24. | Aug 2 |
| Pepper | Dec 30 | Feb 24–Mar 3 | 253 | fits: 75 days to maturity, 253 available after Feb 24. | Aug 7 |
| Lettuce | Dec 16 | Jan 13–Jan 20 | 330 | two-plantings: Plant Jan 13 and again by Oct 11; both mature before Dec 9. | Oct 11 |
| Carrots | — | Jan 20–Jan 27 | 337 | fits: 70 days to maturity, 337 available after Jan 20. | Sep 30 |
| Cucumber | Jan 20 | Feb 24–Mar 3 | 267 | two-plantings: Plant Feb 24 and again by Sep 5; both mature before Nov 18. | Sep 5 |
| Beans | — | Feb 17–Mar 3 | 281 | two-plantings: Plant Feb 17 and again by Sep 12; both mature before Nov 25. | Sep 12 |
| Peas | — | Dec 16–Feb 24 | 358 | fits: 65 days to maturity, 358 available after Dec 16. | Sep 21 |
| Zucchini | Jan 27 | Feb 24–Mar 3 | 267 | two-plantings: Plant Feb 24 and again by Sep 10; both mature before Nov 18. | Sep 10 |
| Onion | Nov 18 | Jan 13–Jan 27 | 330 | fits: 100 days to maturity, 330 available after Jan 13. | — |
| Spinach | — | Dec 16–Feb 3 | 372 | two-plantings: Plant Dec 16 and again by Oct 30; both mature before Dec 23. | Oct 30 |
| Kale | Dec 2 | Jan 13–Jan 27 | 344 | two-plantings: Plant Jan 13 and again by Oct 15; both mature before Dec 23. | Oct 15 |
| Broccoli | Dec 16 | Jan 13–Jan 27 | 330 | fits: 80 days to maturity, 330 available after Jan 13. | Sep 6 |
| Cabbage | Dec 16 | Jan 13–Jan 27 | 344 | fits: 70 days to maturity, 344 available after Jan 13. | Sep 30 |
| Radish | — | Dec 16–Mar 10 | 358 | two-plantings: Plant Dec 16 and again by Oct 31; both mature before Dec 9. | Oct 31 |
| Beets | — | Dec 16–Mar 10 | 358 | two-plantings: Plant Dec 16 and again by Oct 1; both mature before Dec 9. | Oct 1 |
| Potatoes | — | Jan 27–Feb 3 | 316 | fits: 90 days to maturity, 316 available after Jan 27. | — |
| Garlic | — | Dec 2 | 400 | overwinter: Plant Dec 2 to Dec 23; harvest the following summer. | Dec 23 |
| Strawberry | — | Jan 6–Mar 3 | 351 | perennial: A perennial: plant Jan 6; it fruits from the following year and keeps producing for several years. | — |
| Corn | Jan 13 | Feb 17–Feb 24 | 267 | fits: 75 days to maturity, 267 available after Feb 17. | Aug 14 |
| Pumpkin | Jan 27 | Feb 24–Feb 24 | 260 | fits: 100 days to maturity, 260 available after Feb 24. | Jul 20 |
| Cauliflower | Dec 30 | Feb 3–Feb 17 | 309 | fits: 75 days to maturity, 309 available after Feb 3. | Sep 11 |
| Swiss Chard | Dec 16 | Jan 27–Jan 27 | 316 | two-plantings: Plant Jan 27 and again by Oct 1; both mature before Dec 9. | Oct 1 |
| Arugula | — | Dec 16–Mar 10 | 372 | two-plantings: Plant Dec 16 and again by Oct 30; both mature before Dec 23. | Oct 30 |
| Brussel Sprouts | Dec 16 | Jan 13–Jan 27 | 344 | fits: 100 days to maturity, 344 available after Jan 13. | Aug 31 |
| Butternut Squash | Jan 27 | Feb 24–Mar 3 | 260 | fits: 100 days to maturity, 260 available after Feb 24. | Jul 20 |
| Eggplant | Dec 23 | Feb 24–Mar 3 | 253 | fits: 70 days to maturity, 253 available after Feb 24. | Aug 12 |
| Okra | Jan 13 | Feb 17–Feb 24 | 274 | two-plantings: Plant Feb 17 and again by Sep 10; both mature before Nov 18. | Sep 10 |
| Basil | Jan 6 | Mar 3–Mar 3 | 260 | two-plantings: Plant Mar 3 and again by Sep 5; both mature before Nov 18. | Sep 5 |
| Cilantro | — | Jan 13–Feb 3 | 330 | two-plantings: Plant Jan 13 and again by Oct 6; both mature before Dec 9. | Oct 6 |
| Parsley | Dec 2 | Feb 17–Feb 24 | 295 | fits: 70 days to maturity, 295 available after Feb 17. | Sep 16 |
| Celery | Dec 2 | Feb 17–Mar 3 | 295 | fits: 120 days to maturity, 295 available after Feb 17. | Jul 28 |
| Scallions | Dec 2 | Jan 13–Jan 27 | 344 | two-plantings: Plant Jan 13 and again by Oct 10; both mature before Dec 23. | Oct 10 |
| Turnip | — | Jan 13–Jan 27 | 344 | two-plantings: Plant Jan 13 and again by Oct 20; both mature before Dec 23. | Oct 20 |
| Kohlrabi | — | Dec 30–Jan 13 | 358 | two-plantings: Plant Dec 30 and again by Oct 15; both mature before Dec 23. | Oct 15 |
| Bok Choy | Jan 13 | Feb 3–Feb 10 | 309 | two-plantings: Plant Feb 3 and again by Oct 11; both mature before Dec 9. | Oct 11 |
| Collards | Dec 2 | Jan 13–Jan 27 | 344 | two-plantings: Plant Jan 13 and again by Oct 10; both mature before Dec 23. | Oct 10 |
| Cantaloupe | Jan 27 | Feb 24–Mar 3 | 253 | fits: 85 days to maturity, 253 available after Feb 24. | Jul 28 |
| Chives | Nov 18 | Feb 17–Feb 24 | 309 | fits: 90 days to maturity, 309 available after Feb 17. | — |
| Dill | — | Dec 16–Mar 10 | 358 | two-plantings: Plant Dec 16 and again by Oct 1; both mature before Dec 9. | Oct 1 |
| Oregano | Dec 2 | Feb 17–Feb 24 | 309 | fits: 80 days to maturity, 309 available after Feb 17. | — |
| Rosemary | Nov 18 | Feb 17–Feb 24 | 295 | fits: 80 days to maturity, 295 available after Feb 17. | — |
| Sage | Dec 16 | Feb 17–Feb 24 | 309 | fits: 75 days to maturity, 309 available after Feb 17. | — |
| Thyme | Dec 2 | Feb 17–Feb 24 | 309 | fits: 90 days to maturity, 309 available after Feb 17. | — |
| Calendula | Dec 30 | Jan 27–Feb 10 | 316 | two-plantings: Plant Jan 27 and again by Oct 6; both mature before Dec 9. | Oct 6 |
| Cosmos | Jan 13 | Feb 10–Feb 24 | 281 | two-plantings: Plant Feb 10 and again by Sep 5; both mature before Nov 18. | Sep 5 |
| Lavender | Nov 18 | Feb 10–Feb 24 | 316 | fits: 90 days to maturity, 316 available after Feb 10. | — |
| Marigolds | Dec 30 | Feb 10–Feb 17 | 281 | two-plantings: Plant Feb 10 and again by Sep 15; both mature before Nov 18. | Sep 15 |
| Melons | Jan 27 | Feb 24–Mar 3 | 253 | fits: 85 days to maturity, 253 available after Feb 24. | Jul 28 |
| Mint | — | Feb 10–Feb 24 | 316 | fits: 90 days to maturity, 316 available after Feb 10. | — |
| Nasturtiums | Jan 13 | Feb 10–Feb 17 | 281 | two-plantings: Plant Feb 10 and again by Sep 10; both mature before Nov 18. | Sep 10 |
| Pole Beans | — | Feb 17–Mar 3 | 274 | fits: 65 days to maturity, 274 available after Feb 17. | Aug 31 |
| Spaghetti Squash | Jan 27 | Feb 24–Mar 3 | 260 | fits: 90 days to maturity, 260 available after Feb 24. | Jul 30 |
| Sunflowers | — | Feb 10–Feb 24 | 281 | fits: 70 days to maturity, 281 available after Feb 10. | Aug 26 |
| Tomatillos | Dec 16 | Feb 17–Feb 24 | 260 | fits: 75 days to maturity, 260 available after Feb 17. | Aug 7 |
| Watermelon | Jan 27 | Feb 17–Feb 24 | 260 | fits: 80 days to maturity, 260 available after Feb 17. | Aug 2 |
| Yellow Squash | Jan 27 | Feb 24–Mar 3 | 267 | two-plantings: Plant Feb 24 and again by Sep 10; both mature before Nov 18. | Sep 10 |
| Zinnias | Jan 13 | Feb 10–Feb 24 | 281 | two-plantings: Plant Feb 10 and again by Sep 5; both mature before Nov 18. | Sep 5 |
Month by month in Gridley
| Month | What to do |
|---|---|
| January | Start indoors: Basil (Jan 6), Tomato (Jan 6), Bok Choy (Jan 13), Corn (Jan 13), Cosmos (Jan 13), Nasturtiums (Jan 13), +11 more. Direct sow from: Cilantro (Jan 13), Turnip (Jan 13), Carrots (Jan 20), Potatoes (Jan 27). Transplant from: Broccoli (Jan 13), Brussel Sprouts (Jan 13), Cabbage (Jan 13), Collards (Jan 13), Kale (Jan 13), Lettuce (Jan 13), +4 more. Plant: Strawberry (Jan 6). |
| February | Direct sow from: Sunflowers (Feb 10), Beans (Feb 17), Pole Beans (Feb 17). Transplant from: Bok Choy (Feb 3), Cauliflower (Feb 3), Cosmos (Feb 10), Lavender (Feb 10), Marigolds (Feb 10), Mint (Feb 10), +24 more. Last frost around February 10. |
| March | Transplant from: Basil (Mar 3). |
| 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 20), Pumpkin (Jul 20), Cantaloupe (Jul 28), Celery (Jul 28), Melons (Jul 28), Spaghetti Squash (Jul 30). |
| August | Last sowing dates: Tomato (Aug 2), Watermelon (Aug 2), Pepper (Aug 7), Tomatillos (Aug 7), Eggplant (Aug 12), Corn (Aug 14), +3 more. |
| September | Last sowing dates: Basil (Sep 5), Cosmos (Sep 5), Cucumber (Sep 5), Zinnias (Sep 5), Broccoli (Sep 6), Nasturtiums (Sep 10), +10 more. |
| October | Last sowing dates: Beets (Oct 1), Dill (Oct 1), Swiss Chard (Oct 1), Calendula (Oct 6), Cilantro (Oct 6), Collards (Oct 10), +9 more. |
| November | Start indoors: Chives (Nov 18), Lavender (Nov 18), Onion (Nov 18), Rosemary (Nov 18). |
| December | Start indoors: Celery (Dec 2), Collards (Dec 2), Kale (Dec 2), Oregano (Dec 2), Parsley (Dec 2), Scallions (Dec 2), +13 more. Direct sow from: Garlic (Dec 2), Arugula (Dec 16), Beets (Dec 16), Dill (Dec 16), Peas (Dec 16), Radish (Dec 16), +2 more. First frost around December 2. Last sowing dates: Garlic (Dec 23). |
Frequently Asked Questions
What is the last frost date for Gridley, CA (ZIP 95948)?
The median last spring frost date for Gridley, CA (ZIP code 95948) is around February 10. 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 21; one in ten it runs past April 3.
What is the first fall frost date in Gridley, CA?
The median first fall frost date for Gridley, CA is around December 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 2 in the earliest one-in-ten years, so cover tomatoes and peppers from then.
How long is the growing season in Gridley, CA?
The frost-free growing season in Gridley is about 295 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 Gridley (295 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 Gridley, CA?
Gridley, 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 Gridley, CA?
Start tomatoes indoors Jan 6 and plant out Feb 24 in Gridley. The planner uses the local median last frost and this crop's indoor-start and transplant offsets.
How many plantings of lettuce fit in Gridley?
Two: plant Jan 13 and again by Oct 11; both mature before Dec 9.
When do I plant garlic in Gridley?
Dec 2 to Dec 23; it overwinters and is ready the following summer.
Can I get two tomato crops in Gridley?
Yes: plant out Feb 24 for a summer crop, and set out a second round of transplants by Aug 2 for a fall crop.
Which nearby ZIP has a longer season?
Yuba City (ZIP 95991) has 307 frost-free days, 12 more than Gridley (ZIP 95948). See Yuba City ZIP 95991 frost dates
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