Anderson, CA planting zone & frost dates
Anderson is in USDA hardiness zone 9a. The last spring frost usually comes around March 3 and the first fall frost around November 21, for a growing season of about 261 days.
Planting calendar for Anderson
Dates are counted from the average last spring frost (March 3) using the typical timing recommended by U.S. extension services. Warm-season crops go out only after the danger of frost has passed and the soil has warmed.
| Crop | When |
|---|---|
| Tomatoes | Start seeds indoors: Jan 6 – Jan 20 Transplant outdoors: Mar 10 – Mar 17 |
| Peppers | Start seeds indoors: Dec 23 – Jan 6 Transplant outdoors: Mar 17 – Mar 24 |
| Eggplant | Start seeds indoors: Dec 23 – Jan 6 Transplant outdoors: Mar 17 – Mar 24 |
| Broccoli | Start seeds indoors: Dec 23 – Jan 6 Transplant outdoors: Feb 3 – Feb 17 |
| Cabbage | Start seeds indoors: Dec 23 – Jan 6 Transplant outdoors: Feb 3 – Feb 17 |
| Onions (sets) | Plant outdoors: Feb 3 – Feb 17 |
| Peas | Sow outdoors: Jan 20 – Feb 3 |
| Spinach | Sow outdoors: Jan 20 – Feb 3 |
| Lettuce | Sow outdoors: Feb 3 – Feb 17 |
| Carrots | Sow outdoors: Feb 3 – Feb 17 |
| Potatoes | Plant outdoors: Feb 3 – Feb 17 |
| Beans | Sow outdoors: Mar 10 – Mar 17 |
| Sweet corn | Sow outdoors: Mar 10 – Mar 17 |
| Cucumbers | Sow outdoors: Mar 10 – Mar 17 |
| Squash & zucchini | Sow outdoors: Mar 10 – Mar 17 |
| Basil | Start seeds indoors: Jan 20 – Feb 3 Transplant outdoors: Mar 10 – Mar 17 |
Fall garden: cool-season crops like lettuce, spinach and kale can be sown again around Sep 26 (8 weeks before the average first fall frost on Nov 21).
Useful for zone 9a gardens
- Seed starting kit with dome — to start seeds indoors before the last frost
- LED grow light for seedlings — stops leggy seedlings
- Frost cloth / plant covers — for late spring and early fall frosts
- Soil thermometer — warm-season crops need soil above 60°F
- Shade cloth — for hot summers
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Frost risk in detail
| 90% chance | 50% chance | 10% chance | |
|---|---|---|---|
| Last 32°F frost in spring is after | Jan 31 | Mar 3 | Apr 9 |
| First 32°F frost in fall is before | Dec 7 | Nov 21 | Nov 7 |
How to read it: in spring there is a 10% chance of a frost after April 9, so that is a safe date for tender plants. In fall there is a 10% chance of frost before November 7. A hard freeze (28°F) usually ends around January 27.
Hardiness zone by ZIP code in Anderson
- 96007 zone 9a
Nearby cities
Questions
What growing zone is Anderson, CA?
Anderson is in USDA Plant Hardiness Zone 9a (average extreme winter low 20°F to 25°F), according to the USDA 2023 map.
When is the last frost in Anderson?
The average last spring frost (32°F) in Anderson is March 3. There is still a 10% chance of frost until April 9.
When can I plant tomatoes in Anderson?
Transplant tomatoes outdoors 1–2 weeks after the average last frost: around Mar 10 – Mar 17. Start seeds indoors 6–8 weeks before the last frost.
Frost dates: NOAA U.S. Climate Normals 1991–2020, station Redding Muni Ap, CA (USW00024257), 7.7 km (4.8 mi) from the city center, elevation 152 m, based on 25 years of records. Hardiness zone: USDA Plant Hardiness Zone Map 2023 for the ZIP code nearest to the city center. Microclimates (valleys, hills, cities, coasts) can be warmer or colder: check the local forecast before planting. How we calculate the data.