Chino, CA planting zone & frost dates
Chino is in USDA hardiness zone 10a. The last spring frost usually comes around January 17 and the first fall frost around December 19, for a growing season of about 335 days.
Planting calendar for Chino
Dates are counted from the average last spring frost (January 17) 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 22 – Dec 6 Transplant outdoors: Jan 24 – Jan 31 |
| Peppers | Start seeds indoors: Nov 8 – Nov 22 Transplant outdoors: Jan 31 – Feb 7 |
| Eggplant | Start seeds indoors: Nov 8 – Nov 22 Transplant outdoors: Jan 31 – Feb 7 |
| Broccoli | Start seeds indoors: Nov 8 – Nov 22 Transplant outdoors: Dec 20 – Jan 3 |
| Cabbage | Start seeds indoors: Nov 8 – Nov 22 Transplant outdoors: Dec 20 – Jan 3 |
| Onions (sets) | Plant outdoors: Dec 20 – Jan 3 |
| Peas | Sow outdoors: Dec 6 – Dec 20 |
| Spinach | Sow outdoors: Dec 6 – Dec 20 |
| Lettuce | Sow outdoors: Dec 20 – Jan 3 |
| Carrots | Sow outdoors: Dec 20 – Jan 3 |
| Potatoes | Plant outdoors: Dec 20 – Jan 3 |
| Beans | Sow outdoors: Jan 24 – Jan 31 |
| Sweet corn | Sow outdoors: Jan 24 – Jan 31 |
| Cucumbers | Sow outdoors: Jan 24 – Jan 31 |
| Squash & zucchini | Sow outdoors: Jan 24 – Jan 31 |
| Basil | Start seeds indoors: Dec 6 – Dec 20 Transplant outdoors: Jan 24 – Jan 31 |
Fall garden: cool-season crops like lettuce, spinach and kale can be sown again around Oct 24 (8 weeks before the average first fall frost on Dec 19).
Frost risk in detail
| 90% chance | 50% chance | 10% chance | |
|---|---|---|---|
| Last 32°F frost in spring is after | Dec 18 | Jan 17 | Feb 22 |
| First 32°F frost in fall is before | Jan 17 | Dec 19 | Nov 27 |
How to read it: in spring there is a 10% chance of a frost after February 22, so that is a safe date for tender plants. In fall there is a 10% chance of frost before November 27. A hard freeze (28°F) usually ends around January 3.
Hardiness zone by ZIP code in Chino
- 91708 zone 9b
- 91710 zone 10a
Nearby cities
- Ontario zone 10a
- Montclair zone 10a, last frost Jan 8
- Chino Hills zone 10a, last frost Jan 8
- Pomona zone 10a, last frost Jan 8
- Claremont zone 10a, last frost Jan 8
- Upland zone 10a
- La Verne zone 10a, last frost Jan 8
- Diamond Bar zone 10a, last frost Jan 8
Questions
What growing zone is Chino, CA?
Chino is in USDA Plant Hardiness Zone 10a (average extreme winter low 30°F to 35°F), according to the USDA 2023 map. Some ZIP codes of the city fall in zone 9b.
When is the last frost in Chino?
The average last spring frost (32°F) in Chino is January 17. There is still a 10% chance of frost until February 22.
When can I plant tomatoes in Chino?
Transplant tomatoes outdoors 1–2 weeks after the average last frost: around Jan 24 – Jan 31. Start seeds indoors 6–8 weeks before the last frost.
Frost dates: NOAA U.S. Climate Normals 1991–2020, station Chino Ap, CA (USW00003179), 6.4 km (4.0 mi) from the city center, elevation 198 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.