Tulsa, OK planting zone & frost dates
Tulsa is in USDA hardiness zone 7b. The last spring frost usually comes around March 31 and the first fall frost around November 4, for a growing season of about 220 days.
Planting calendar for Tulsa
Dates are counted from the average last spring frost (March 31) 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 3 – Feb 17 Transplant outdoors: Apr 7 – Apr 14 |
| Peppers | Start seeds indoors: Jan 20 – Feb 3 Transplant outdoors: Apr 14 – Apr 21 |
| Eggplant | Start seeds indoors: Jan 20 – Feb 3 Transplant outdoors: Apr 14 – Apr 21 |
| Broccoli | Start seeds indoors: Jan 20 – Feb 3 Transplant outdoors: Mar 3 – Mar 17 |
| Cabbage | Start seeds indoors: Jan 20 – Feb 3 Transplant outdoors: Mar 3 – Mar 17 |
| Onions (sets) | Plant outdoors: Mar 3 – Mar 17 |
| Peas | Sow outdoors: Feb 17 – Mar 3 |
| Spinach | Sow outdoors: Feb 17 – Mar 3 |
| Lettuce | Sow outdoors: Mar 3 – Mar 17 |
| Carrots | Sow outdoors: Mar 3 – Mar 17 |
| Potatoes | Plant outdoors: Mar 3 – Mar 17 |
| Beans | Sow outdoors: Apr 7 – Apr 14 |
| Sweet corn | Sow outdoors: Apr 7 – Apr 14 |
| Cucumbers | Sow outdoors: Apr 7 – Apr 14 |
| Squash & zucchini | Sow outdoors: Apr 7 – Apr 14 |
| Basil | Start seeds indoors: Feb 17 – Mar 3 Transplant outdoors: Apr 7 – Apr 14 |
Fall garden: cool-season crops like lettuce, spinach and kale can be sown again around Sep 9 (8 weeks before the average first fall frost on Nov 4).
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 11 | Mar 31 | Apr 15 |
| First 32°F frost in fall is before | Nov 19 | Nov 4 | Oct 20 |
How to read it: in spring there is a 10% chance of a frost after April 15, so that is a safe date for tender plants. In fall there is a 10% chance of frost before October 20. A hard freeze (28°F) usually ends around March 17.
Hardiness zone by ZIP code in Tulsa
- 74101 zone 7b
- 74102 zone 7b
- 74103 zone 7b
- 74104 zone 7b
- 74105 zone 7b
- 74106 zone 7b
- 74107 zone 7b
- 74108 zone 7b
- 74110 zone 7b
- 74112 zone 7b
- 74114 zone 7b
- 74115 zone 7b
- 74116 zone 7b
- 74117 zone 7b
- 74119 zone 7b
- 74120 zone 7b
- 74121 zone 7b
- 74126 zone 7b
- 74127 zone 7b
- 74128 zone 7b
- 74129 zone 7b
- 74130 zone 7b
- 74131 zone 7b
- 74132 zone 7b
- 74133 zone 7b
- 74134 zone 7b
- 74135 zone 7b
- 74136 zone 7b
- 74137 zone 7b
- 74141 zone 7b
- 74145 zone 7b
- 74146 zone 7b
- 74147 zone 7b
- 74148 zone 7b
- 74149 zone 7b
- 74150 zone 7b
- 74152 zone 7b
- 74153 zone 7b
- 74155 zone 7b
- 74156 zone 7b
- 74157 zone 7b
- 74158 zone 7b
- 74159 zone 7b
- 74169 zone 7b
- 74170 zone 7b
- 74171 zone 7b
- 74182 zone 7b
- 74186 zone 7b
- 74187 zone 7b
- 74192 zone 7b
- 74193 zone 7b
Nearby cities
- Sand Springs zone 7b, last frost Mar 30
- Jenks zone 7b, last frost Mar 30
- Owasso zone 7b, last frost Mar 31
- Sapulpa zone 7b, last frost Mar 30
- Glenpool zone 7b, last frost Mar 30
- Broken Arrow zone 7b, last frost Apr 1
- Bixby zone 7b, last frost Apr 1
- Claremore zone 7a, last frost Apr 7
Questions
What growing zone is Tulsa, OK?
Tulsa 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 Tulsa?
The average last spring frost (32°F) in Tulsa is March 31. There is still a 10% chance of frost until April 15.
When can I plant tomatoes in Tulsa?
Transplant tomatoes outdoors 1–2 weeks after the average last frost: around Apr 7 – Apr 14. Start seeds indoors 6–8 weeks before the last frost.
Frost dates: NOAA U.S. Climate Normals 1991–2020, station Tulsa Intl Ap, OK (USW00013968), 10.7 km (6.6 mi) from the city center, elevation 198 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.