Oklahoma City, OK planting zone & frost dates
Oklahoma City is in USDA hardiness zone 7b. The last spring frost usually comes around April 4 and the first fall frost around November 2, for a growing season of about 213 days.
Planting calendar for Oklahoma City
Dates are counted from the average last spring frost (April 4) 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 7 – Feb 21 Transplant outdoors: Apr 11 – Apr 18 |
| Peppers | Start seeds indoors: Jan 24 – Feb 7 Transplant outdoors: Apr 18 – Apr 25 |
| Eggplant | Start seeds indoors: Jan 24 – Feb 7 Transplant outdoors: Apr 18 – Apr 25 |
| Broccoli | Start seeds indoors: Jan 24 – Feb 7 Transplant outdoors: Mar 7 – Mar 21 |
| Cabbage | Start seeds indoors: Jan 24 – Feb 7 Transplant outdoors: Mar 7 – Mar 21 |
| Onions (sets) | Plant outdoors: Mar 7 – Mar 21 |
| Peas | Sow outdoors: Feb 21 – Mar 7 |
| Spinach | Sow outdoors: Feb 21 – Mar 7 |
| Lettuce | Sow outdoors: Mar 7 – Mar 21 |
| Carrots | Sow outdoors: Mar 7 – Mar 21 |
| Potatoes | Plant outdoors: Mar 7 – Mar 21 |
| Beans | Sow outdoors: Apr 11 – Apr 18 |
| Sweet corn | Sow outdoors: Apr 11 – Apr 18 |
| Cucumbers | Sow outdoors: Apr 11 – Apr 18 |
| Squash & zucchini | Sow outdoors: Apr 11 – Apr 18 |
| Basil | Start seeds indoors: Feb 21 – Mar 7 Transplant outdoors: Apr 11 – Apr 18 |
Fall garden: cool-season crops like lettuce, spinach and kale can be sown again around Sep 7 (8 weeks before the average first fall frost on Nov 2).
Useful for zone 7b 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 16 | Apr 4 | Apr 20 |
| First 32°F frost in fall is before | Nov 17 | Nov 2 | Oct 21 |
How to read it: in spring there is a 10% chance of a frost after April 20, so that is a safe date for tender plants. In fall there is a 10% chance of frost before October 21. A hard freeze (28°F) usually ends around March 21.
Hardiness zone by ZIP code in Oklahoma City
- 73101 zone 7b
- 73102 zone 7b
- 73103 zone 7b
- 73104 zone 7b
- 73105 zone 7b
- 73106 zone 7b
- 73107 zone 7b
- 73108 zone 7b
- 73109 zone 7b
- 73110 zone 7b
- 73111 zone 7b
- 73112 zone 7b
- 73113 zone 7b
- 73114 zone 7b
- 73115 zone 7b
- 73116 zone 7b
- 73117 zone 7b
- 73118 zone 7b
- 73119 zone 7b
- 73120 zone 7b
- 73121 zone 7b
- 73122 zone 7b
- 73123 zone 7b
- 73124 zone 7b
- 73125 zone 7b
- 73126 zone 7b
- 73127 zone 7b
- 73128 zone 7b
- 73129 zone 7b
- 73130 zone 7b
- 73131 zone 7b
- 73132 zone 7b
- 73134 zone 7b
- 73135 zone 7b
- 73136 zone 7b
- 73137 zone 7b
- 73139 zone 7b
- 73140 zone 7b
- 73141 zone 7b
- 73142 zone 7b
- 73143 zone 7b
- 73144 zone 7b
- 73145 zone 7b
- 73146 zone 7b
- 73147 zone 7b
- 73148 zone 7b
- 73149 zone 7b
- 73150 zone 7b
- 73151 zone 7b
- 73152 zone 7b
- 73153 zone 7b
- 73154 zone 7b
- 73155 zone 7b
- 73156 zone 7b
- 73157 zone 7b
- 73159 zone 7b
- 73160 zone 7b
- 73162 zone 7b
- 73163 zone 7b
- 73164 zone 7b
- 73165 zone 7b
- 73167 zone 7b
- 73169 zone 7b
- 73170 zone 7b
- 73172 zone 7b
- 73173 zone 7b
- 73178 zone 7b
- 73179 zone 7b
- 73184 zone 7b
- 73189 zone 7b
- 73190 zone 7b
- 73194 zone 7b
- 73195 zone 7b
- 73196 zone 7b
Nearby cities
- Del City zone 7b, last frost Apr 2
- Warr Acres zone 7b, last frost Apr 2
- Midwest City zone 7b, last frost Apr 2
- Bethany zone 7b, last frost Apr 2
- Moore zone 7b, last frost Apr 4
- Edmond zone 7b, last frost Apr 2
- Mustang zone 7b, last frost Apr 4
- Yukon zone 7b, last frost Apr 2
Questions
What growing zone is Oklahoma City, OK?
Oklahoma City is in USDA Plant Hardiness Zone 7b (average extreme winter low 5°F to 10°F), according to the USDA 2023 map.
When is the last frost in Oklahoma City?
The average last spring frost (32°F) in Oklahoma City is April 4. There is still a 10% chance of frost until April 20.
When can I plant tomatoes in Oklahoma City?
Transplant tomatoes outdoors 1–2 weeks after the average last frost: around Apr 11 – Apr 18. Start seeds indoors 6–8 weeks before the last frost.
Frost dates: NOAA U.S. Climate Normals 1991–2020, station Oklahoma City Will Rogers Ap, OK (USW00013967), 11.6 km (7.2 mi) from the city center, elevation 392 m, based on 29 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.