Kingman, AZ planting zone & frost dates
Kingman is in USDA hardiness zone 8b. The last spring frost usually comes around April 2 and the first fall frost around November 11, for a growing season of about 220 days.
Planting calendar for Kingman
Dates are counted from the average last spring frost (April 2) 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: Feb 5 – Feb 19 Transplant outdoors: Apr 9 – Apr 16 |
| Peppers | Start seeds indoors: Jan 22 – Feb 5 Transplant outdoors: Apr 16 – Apr 23 |
| Eggplant | Start seeds indoors: Jan 22 – Feb 5 Transplant outdoors: Apr 16 – Apr 23 |
| Broccoli | Start seeds indoors: Jan 22 – Feb 5 Transplant outdoors: Mar 5 – Mar 19 |
| Cabbage | Start seeds indoors: Jan 22 – Feb 5 Transplant outdoors: Mar 5 – Mar 19 |
| Onions (sets) | Plant outdoors: Mar 5 – Mar 19 |
| Peas | Sow outdoors: Feb 19 – Mar 5 |
| Spinach | Sow outdoors: Feb 19 – Mar 5 |
| Lettuce | Sow outdoors: Mar 5 – Mar 19 |
| Carrots | Sow outdoors: Mar 5 – Mar 19 |
| Potatoes | Plant outdoors: Mar 5 – Mar 19 |
| Beans | Sow outdoors: Apr 9 – Apr 16 |
| Sweet corn | Sow outdoors: Apr 9 – Apr 16 |
| Cucumbers | Sow outdoors: Apr 9 – Apr 16 |
| Squash & zucchini | Sow outdoors: Apr 9 – Apr 16 |
| Basil | Start seeds indoors: Feb 19 – Mar 5 Transplant outdoors: Apr 9 – Apr 16 |
Fall garden: cool-season crops like lettuce, spinach and kale can be sown again around Sep 16 (8 weeks before the average first fall frost on Nov 11).
Useful for zone 8b 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
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Frost risk in detail
| 90% chance | 50% chance | 10% chance | |
|---|---|---|---|
| Last 32°F frost in spring is after | Mar 8 | Apr 2 | Apr 21 |
| First 32°F frost in fall is before | Nov 24 | Nov 11 | Oct 26 |
How to read it: in spring there is a 10% chance of a frost after April 21, so that is a safe date for tender plants. In fall there is a 10% chance of frost before October 26. A hard freeze (28°F) usually ends around March 6.
Hardiness zone by ZIP code in Kingman
- 86401 zone 8b
- 86402 zone 8b
- 86409 zone 8b
Nearby cities
- New Kingman-Butler zone 8b, last frost Apr 2
- Bullhead City zone 9b, last frost Jan 4
- Lake Havasu City zone 10a
- Chino Valley zone 8a, last frost Apr 27
- Prescott zone 7b, last frost Apr 30
- Prescott Valley zone 7b, last frost Apr 20
- Cottonwood zone 8b, last frost Mar 30
- Verde Village zone 8b, last frost Mar 30
Questions
What growing zone is Kingman, AZ?
Kingman 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 Kingman?
The average last spring frost (32°F) in Kingman is April 2. There is still a 10% chance of frost until April 21.
When can I plant tomatoes in Kingman?
Transplant tomatoes outdoors 1–2 weeks after the average last frost: around Apr 9 – Apr 16. Start seeds indoors 6–8 weeks before the last frost.
Frost dates: NOAA U.S. Climate Normals 1991–2020, station Kingman Mohave Co Ap, AZ (USW00093167), 13.3 km (8.3 mi) from the city center, elevation 1042 m, based on 19 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.