Fremont, CA planting zone & frost dates
Fremont is in USDA hardiness zone 9b. The last spring frost usually comes around January 7 and the first fall frost around December 22, for a growing season of about 353 days.
Planting calendar for Fremont
Dates are counted from the average last spring frost (January 7) 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 12 – Nov 26 Transplant outdoors: Jan 14 – Jan 21 |
| Peppers | Start seeds indoors: Oct 29 – Nov 12 Transplant outdoors: Jan 21 – Jan 28 |
| Eggplant | Start seeds indoors: Oct 29 – Nov 12 Transplant outdoors: Jan 21 – Jan 28 |
| Broccoli | Start seeds indoors: Oct 29 – Nov 12 Transplant outdoors: Dec 10 – Dec 24 |
| Cabbage | Start seeds indoors: Oct 29 – Nov 12 Transplant outdoors: Dec 10 – Dec 24 |
| Onions (sets) | Plant outdoors: Dec 10 – Dec 24 |
| Peas | Sow outdoors: Nov 26 – Dec 10 |
| Spinach | Sow outdoors: Nov 26 – Dec 10 |
| Lettuce | Sow outdoors: Dec 10 – Dec 24 |
| Carrots | Sow outdoors: Dec 10 – Dec 24 |
| Potatoes | Plant outdoors: Dec 10 – Dec 24 |
| Beans | Sow outdoors: Jan 14 – Jan 21 |
| Sweet corn | Sow outdoors: Jan 14 – Jan 21 |
| Cucumbers | Sow outdoors: Jan 14 – Jan 21 |
| Squash & zucchini | Sow outdoors: Jan 14 – Jan 21 |
| Basil | Start seeds indoors: Nov 26 – Dec 10 Transplant outdoors: Jan 14 – Jan 21 |
Fall garden: cool-season crops like lettuce, spinach and kale can be sown again around Oct 27 (8 weeks before the average first fall frost on Dec 22).
Frost risk in detail
| 90% chance | 50% chance | 10% chance | |
|---|---|---|---|
| Last 32°F frost in spring is after | Dec 14 | Jan 7 | Feb 7 |
| First 32°F frost in fall is before | Jan 21 | Dec 22 | Dec 2 |
How to read it: in spring there is a 10% chance of a frost after February 7, so that is a safe date for tender plants. In fall there is a 10% chance of frost before December 2. A hard freeze (28°F) usually ends around December 31.
Hardiness zone by ZIP code in Fremont
- 94536 zone 9b
- 94537 zone 9b
- 94538 zone 10a
- 94539 zone 9b
- 94555 zone 10a
Nearby cities
- Newark zone 10a
- Union City zone 9b, last frost Jan 7
- Fairview zone 9b
- Milpitas zone 10a, last frost Jan 12
- Hayward zone 10a
- Pleasanton zone 9b, last frost Feb 15
- Dublin zone 9b, last frost Feb 15
- East Palo Alto zone 10a, last frost Feb 1
Questions
What growing zone is Fremont, CA?
Fremont is in USDA Plant Hardiness Zone 9b (average extreme winter low 25°F to 30°F), according to the USDA 2023 map. Some ZIP codes of the city fall in zone 10a.
When is the last frost in Fremont?
The average last spring frost (32°F) in Fremont is January 7. There is still a 10% chance of frost until February 7.
When can I plant tomatoes in Fremont?
Transplant tomatoes outdoors 1–2 weeks after the average last frost: around Jan 14 – Jan 21. Start seeds indoors 6–8 weeks before the last frost.
Frost dates: NOAA U.S. Climate Normals 1991–2020, station Fremont, CA (USC00043244), 2.5 km (1.6 mi) from the city center, elevation 12 m, based on 18 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.