Planting calendar for Oklahoma
Short answer
Most of Oklahoma is in climate zone 3, with an average last spring frost around Mar 10 and first fall frost around Nov 25. Plant hardy crops before the last frost, tender crops after. Enter your ZIP for dates tuned to your exact area.
Last spring frost
Mar 10
First fall frost
Nov 25
Climate zone(s)
3, 4
| Crop | Start indoors | Plant outside | Harvest |
|---|---|---|---|
| Peas | — | Feb 3 | Apr 4 |
| Spinach | — | Feb 3 | Mar 20 |
| Radishes | — | Feb 10 | Mar 10 |
| Kale | Feb 3 | Feb 10 | Apr 6 |
| Onions | Jan 1 | Feb 10 | May 21 |
| Lettuce | Feb 10 | Feb 17 | Apr 8 |
| Carrots | — | Feb 17 | Apr 28 |
| Beets | — | Feb 17 | Apr 13 |
| Broccoli | Jan 27 | Feb 24 | Apr 30 |
| Cabbage | Jan 27 | Feb 24 | May 5 |
| Potatoes | — | Feb 24 | May 25 |
| Cilantro | — | Feb 24 | Apr 10 |
| Zucchini / squash | Feb 17 | Mar 17 | May 6 |
| Green beans | — | Mar 17 | May 11 |
| Sweet corn | — | Mar 17 | May 31 |
| Tomatoes | Jan 27 | Mar 24 | Jun 7 |
| Peppers | Jan 13 | Mar 24 | Jun 12 |
| Cucumbers | Feb 17 | Mar 24 | May 18 |
| Pumpkins | Feb 24 | Mar 24 | Jul 12 |
| Basil | Jan 27 | Mar 24 | May 23 |
Dates use zone 3 (most of Oklahoma); colder areas run later. Enter your ZIP in the calculator for your exact zone.
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Frequently asked questions
When is the last frost in Oklahoma?
Most of Oklahoma (zone 3) averages its last spring frost around Mar 10 and first fall frost around Nov 25. Colder parts of the state run later in spring.
When should I plant tomatoes in Oklahoma?
Set tomato transplants out around Mar 24 in most of Oklahoma — a couple of weeks after the last frost. Start seeds indoors about Jan 27.
What is the growing season in Oklahoma?
Roughly Nov 25 minus Mar 10 for zone 3. Cool-season crops extend it on both ends; enter your ZIP for your exact dates.