Yucaipa, CA planting zone & frost dates
Yucaipa is in USDA hardiness zone 9b. The last spring frost usually comes around January 10 and the first fall frost around December 23, for a growing season of about 350 days.
Planting calendar for Yucaipa
Dates are counted from the average last spring frost (January 10) 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 15 – Nov 29 Transplant outdoors: Jan 17 – Jan 24 |
| Peppers | Start seeds indoors: Nov 1 – Nov 15 Transplant outdoors: Jan 24 – Jan 31 |
| Eggplant | Start seeds indoors: Nov 1 – Nov 15 Transplant outdoors: Jan 24 – Jan 31 |
| Broccoli | Start seeds indoors: Nov 1 – Nov 15 Transplant outdoors: Dec 13 – Dec 27 |
| Cabbage | Start seeds indoors: Nov 1 – Nov 15 Transplant outdoors: Dec 13 – Dec 27 |
| Onions (sets) | Plant outdoors: Dec 13 – Dec 27 |
| Peas | Sow outdoors: Nov 29 – Dec 13 |
| Spinach | Sow outdoors: Nov 29 – Dec 13 |
| Lettuce | Sow outdoors: Dec 13 – Dec 27 |
| Carrots | Sow outdoors: Dec 13 – Dec 27 |
| Potatoes | Plant outdoors: Dec 13 – Dec 27 |
| Beans | Sow outdoors: Jan 17 – Jan 24 |
| Sweet corn | Sow outdoors: Jan 17 – Jan 24 |
| Cucumbers | Sow outdoors: Jan 17 – Jan 24 |
| Squash & zucchini | Sow outdoors: Jan 17 – Jan 24 |
| Basil | Start seeds indoors: Nov 29 – Dec 13 Transplant outdoors: Jan 17 – Jan 24 |
Fall garden: cool-season crops like lettuce, spinach and kale can be sown again around Oct 28 (8 weeks before the average first fall frost on Dec 23).
Frost risk in detail
| 90% chance | 50% chance | 10% chance | |
|---|---|---|---|
| Last 32°F frost in spring is after | Dec 14 | Jan 10 | Feb 25 |
| First 32°F frost in fall is before | Jan 31 | Dec 23 | Nov 27 |
How to read it: in spring there is a 10% chance of a frost after February 25, 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 December 27.
Hardiness zone by ZIP code in Yucaipa
- 92399 zone 9b
Nearby cities
- Beaumont zone 9b, last frost Jan 10
- Redlands zone 10a, last frost Jan 27
- Highland zone 10a, last frost Jan 27
- Banning zone 9b, last frost Jan 31
- Moreno Valley zone 9b, last frost Jan 27
- Loma Linda zone 10a, last frost Jan 27
- San Bernardino zone 10a, last frost Jan 27
- Lake Arrowhead zone 8a, last frost May 5
Questions
What growing zone is Yucaipa, CA?
Yucaipa 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 Yucaipa?
The average last spring frost (32°F) in Yucaipa is January 10. There is still a 10% chance of frost until February 25.
When can I plant tomatoes in Yucaipa?
Transplant tomatoes outdoors 1–2 weeks after the average last frost: around Jan 17 – Jan 24. Start seeds indoors 6–8 weeks before the last frost.
Frost dates: NOAA U.S. Climate Normals 1991–2020, station Hemet, CA (USC00043896), 35.6 km (22.1 mi) from the city center, elevation 552 m, based on 17 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.