Yuba City, CA planting zone & frost dates
Yuba City is in USDA hardiness zone 9b. The last spring frost usually comes around January 15 and the first fall frost around December 12, for a growing season of about 333 days.
Planting calendar for Yuba City
Dates are counted from the average last spring frost (January 15) 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: Nov 20 – Dec 4 Transplant outdoors: Jan 22 – Jan 29 |
| Peppers | Start seeds indoors: Nov 6 – Nov 20 Transplant outdoors: Jan 29 – Feb 5 |
| Eggplant | Start seeds indoors: Nov 6 – Nov 20 Transplant outdoors: Jan 29 – Feb 5 |
| Broccoli | Start seeds indoors: Nov 6 – Nov 20 Transplant outdoors: Dec 18 – Jan 1 |
| Cabbage | Start seeds indoors: Nov 6 – Nov 20 Transplant outdoors: Dec 18 – Jan 1 |
| Onions (sets) | Plant outdoors: Dec 18 – Jan 1 |
| Peas | Sow outdoors: Dec 4 – Dec 18 |
| Spinach | Sow outdoors: Dec 4 – Dec 18 |
| Lettuce | Sow outdoors: Dec 18 – Jan 1 |
| Carrots | Sow outdoors: Dec 18 – Jan 1 |
| Potatoes | Plant outdoors: Dec 18 – Jan 1 |
| Beans | Sow outdoors: Jan 22 – Jan 29 |
| Sweet corn | Sow outdoors: Jan 22 – Jan 29 |
| Cucumbers | Sow outdoors: Jan 22 – Jan 29 |
| Squash & zucchini | Sow outdoors: Jan 22 – Jan 29 |
| Basil | Start seeds indoors: Dec 4 – Dec 18 Transplant outdoors: Jan 22 – Jan 29 |
Fall garden: cool-season crops like lettuce, spinach and kale can be sown again around Oct 17 (8 weeks before the average first fall frost on Dec 12).
Useful for zone 9b 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 | Dec 18 | Jan 15 | Feb 18 |
| First 32°F frost in fall is before | Jan 9 | Dec 12 | Nov 24 |
How to read it: in spring there is a 10% chance of a frost after February 18, so that is a safe date for tender plants. In fall there is a 10% chance of frost before November 24. A hard freeze (28°F) usually ends around December 31.
Hardiness zone by ZIP code in Yuba City
- 95991 zone 9b
- 95992 zone 9b
- 95993 zone 9b
Nearby cities
- Marysville zone 9b, last frost Jan 15
- South Yuba City zone 9b, last frost Jan 15
- Linda zone 9b, last frost Feb 11
- Olivehurst zone 9b, last frost Feb 11
- Oroville zone 9b, last frost Jan 30
- Lincoln zone 9a, last frost Feb 11
- Rio Linda zone 9b, last frost Feb 22
- Woodland zone 9b, last frost Feb 7
Questions
What growing zone is Yuba City, CA?
Yuba City is in USDA Plant Hardiness Zone 9b (average extreme winter low 25°F to 30°F), according to the USDA 2023 map.
When is the last frost in Yuba City?
The average last spring frost (32°F) in Yuba City is January 15. There is still a 10% chance of frost until February 18.
When can I plant tomatoes in Yuba City?
Transplant tomatoes outdoors 1–2 weeks after the average last frost: around Jan 22 – Jan 29. Start seeds indoors 6–8 weeks before the last frost.
Frost dates: NOAA U.S. Climate Normals 1991–2020, station Marysville, CA (USC00045385), 2.8 km (1.7 mi) from the city center, elevation 17 m, based on 13 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.