Okmulgee, OK planting zone & frost dates
Okmulgee is in USDA hardiness zone 7b. The last spring frost usually comes around April 8 and the first fall frost around October 28, for a growing season of about 203 days.
Planting calendar for Okmulgee
Dates are counted from the average last spring frost (April 8) 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 11 – Feb 25 Transplant outdoors: Apr 15 – Apr 22 |
| Peppers | Start seeds indoors: Jan 28 – Feb 11 Transplant outdoors: Apr 22 – Apr 29 |
| Eggplant | Start seeds indoors: Jan 28 – Feb 11 Transplant outdoors: Apr 22 – Apr 29 |
| Broccoli | Start seeds indoors: Jan 28 – Feb 11 Transplant outdoors: Mar 11 – Mar 25 |
| Cabbage | Start seeds indoors: Jan 28 – Feb 11 Transplant outdoors: Mar 11 – Mar 25 |
| Onions (sets) | Plant outdoors: Mar 11 – Mar 25 |
| Peas | Sow outdoors: Feb 25 – Mar 11 |
| Spinach | Sow outdoors: Feb 25 – Mar 11 |
| Lettuce | Sow outdoors: Mar 11 – Mar 25 |
| Carrots | Sow outdoors: Mar 11 – Mar 25 |
| Potatoes | Plant outdoors: Mar 11 – Mar 25 |
| Beans | Sow outdoors: Apr 15 – Apr 22 |
| Sweet corn | Sow outdoors: Apr 15 – Apr 22 |
| Cucumbers | Sow outdoors: Apr 15 – Apr 22 |
| Squash & zucchini | Sow outdoors: Apr 15 – Apr 22 |
| Basil | Start seeds indoors: Feb 25 – Mar 11 Transplant outdoors: Apr 15 – Apr 22 |
Fall garden: cool-season crops like lettuce, spinach and kale can be sown again around Sep 2 (8 weeks before the average first fall frost on Oct 28).
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
As an Amazon Associate, FrostZoneMap earns from qualifying purchases, at no extra cost to you.
Frost risk in detail
| 90% chance | 50% chance | 10% chance | |
|---|---|---|---|
| Last 32°F frost in spring is after | Mar 23 | Apr 8 | Apr 25 |
| First 32°F frost in fall is before | Nov 11 | Oct 28 | Oct 12 |
How to read it: in spring there is a 10% chance of a frost after April 25, so that is a safe date for tender plants. In fall there is a 10% chance of frost before October 12. A hard freeze (28°F) usually ends around March 29.
Hardiness zone by ZIP code in Okmulgee
- 74447 zone 7b
Nearby cities
- Bixby zone 7b, last frost Apr 1
- Glenpool zone 7b, last frost Mar 30
- Jenks zone 7b, last frost Mar 30
- Sapulpa zone 7b, last frost Mar 30
- Broken Arrow zone 7b, last frost Apr 1
- Tulsa zone 7b, last frost Mar 31
- Sand Springs zone 7b, last frost Mar 30
- Muskogee zone 7b, last frost Apr 7
Questions
What growing zone is Okmulgee, OK?
Okmulgee 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 Okmulgee?
The average last spring frost (32°F) in Okmulgee is April 8. There is still a 10% chance of frost until April 25.
When can I plant tomatoes in Okmulgee?
Transplant tomatoes outdoors 1–2 weeks after the average last frost: around Apr 15 – Apr 22. Start seeds indoors 6–8 weeks before the last frost.
Frost dates: NOAA U.S. Climate Normals 1991–2020, station Okmulgee Wtr Wks, OK (USC00346670), 5.8 km (3.6 mi) from the city center, elevation 197 m, based on 13 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.