Hesperia, CA planting zone & frost dates
Hesperia is in USDA hardiness zone 8b. The last spring frost usually comes around February 28 and the first fall frost around December 1, for a growing season of about 270 days.
Planting calendar for Hesperia
Dates are counted from the average last spring frost (February 28) 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 3 – Jan 17 Transplant outdoors: Mar 7 – Mar 14 |
| Peppers | Start seeds indoors: Dec 20 – Jan 3 Transplant outdoors: Mar 14 – Mar 21 |
| Eggplant | Start seeds indoors: Dec 20 – Jan 3 Transplant outdoors: Mar 14 – Mar 21 |
| Broccoli | Start seeds indoors: Dec 20 – Jan 3 Transplant outdoors: Jan 31 – Feb 14 |
| Cabbage | Start seeds indoors: Dec 20 – Jan 3 Transplant outdoors: Jan 31 – Feb 14 |
| Onions (sets) | Plant outdoors: Jan 31 – Feb 14 |
| Peas | Sow outdoors: Jan 17 – Jan 31 |
| Spinach | Sow outdoors: Jan 17 – Jan 31 |
| Lettuce | Sow outdoors: Jan 31 – Feb 14 |
| Carrots | Sow outdoors: Jan 31 – Feb 14 |
| Potatoes | Plant outdoors: Jan 31 – Feb 14 |
| Beans | Sow outdoors: Mar 7 – Mar 14 |
| Sweet corn | Sow outdoors: Mar 7 – Mar 14 |
| Cucumbers | Sow outdoors: Mar 7 – Mar 14 |
| Squash & zucchini | Sow outdoors: Mar 7 – Mar 14 |
| Basil | Start seeds indoors: Jan 17 – Jan 31 Transplant outdoors: Mar 7 – Mar 14 |
Fall garden: cool-season crops like lettuce, spinach and kale can be sown again around Oct 6 (8 weeks before the average first fall frost on Dec 1).
Frost risk in detail
| 90% chance | 50% chance | 10% chance | |
|---|---|---|---|
| Last 32°F frost in spring is after | Feb 1 | Feb 28 | Apr 3 |
| First 32°F frost in fall is before | Dec 16 | Dec 1 | Nov 11 |
How to read it: in spring there is a 10% chance of a frost after April 3, so that is a safe date for tender plants. In fall there is a 10% chance of frost before November 11. A hard freeze (28°F) usually ends around January 30.
Hardiness zone by ZIP code in Hesperia
- 92340 zone 8b
- 92344 zone 8b
- 92345 zone 8b
Nearby cities
- Victorville zone 8b, last frost Mar 18
- Apple Valley zone 8b, last frost Mar 18
- Crestline zone 8b, last frost May 5
- Adelanto zone 8b, last frost Mar 18
- Lake Arrowhead zone 8a, last frost May 5
- Phelan zone 8b
- Muscoy zone 10a, last frost Jan 27
- Highland zone 10a, last frost Jan 27
Questions
What growing zone is Hesperia, CA?
Hesperia is in USDA Plant Hardiness Zone 8b (average extreme winter low 15°F to 20°F), according to the USDA 2023 map.
When is the last frost in Hesperia?
The average last spring frost (32°F) in Hesperia is February 28. There is still a 10% chance of frost until April 3.
When can I plant tomatoes in Hesperia?
Transplant tomatoes outdoors 1–2 weeks after the average last frost: around Mar 7 – Mar 14. Start seeds indoors 6–8 weeks before the last frost.
Frost dates: NOAA U.S. Climate Normals 1991–2020, station Hesperia 2E, CA (USC00043937), 3.3 km (2.0 mi) from the city center, elevation 931 m, based on 10 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.