Oklahoma Planting Guide & Growing Season
Oklahoma is in USDA hardiness zone 6b-8a with a growing season of 210 days. The average last spring frost is Mar 30 and the average first fall frost is Oct 25.
Growing Conditions in Oklahoma
How Oklahoma Compares
Compare Oklahoma's growing conditions with states that have similar climates.
| State | USDA Zone | Last Frost | First Frost | Season (days) |
|---|---|---|---|---|
| Oklahoma (OK) | 6b-8a | Mar 30 | Oct 25 | 210 |
| Alabama (AL) | 7a-8b | Mar 15 | Nov 5 | 235 |
| Alaska (AK) | 1a-7b | May 30 | Sep 5 | 100 |
| Arizona (AZ) | 4b-10b | Mar 1 | Nov 15 | 260 |
| Arkansas (AR) | 6b-8a | Apr 1 | Oct 25 | 210 |
| California (CA) | 4b-11a | Feb 15 | Nov 30 | 290 |
Frequently Asked Questions About Gardening in Oklahoma
When should I start seeds indoors in Oklahoma?
In Oklahoma, the average last frost date is Mar 30. Start most seeds indoors 6-8 weeks before this date. The USDA hardiness zone for Oklahoma is 6b-8a, with a growing season of approximately 210 days.
What USDA hardiness zone is Oklahoma?
Oklahoma falls in USDA hardiness zones 6b-8a. This affects which perennial plants will survive winter and influences optimal planting times.
When is the first frost in Oklahoma?
The average first frost date in Oklahoma is Oct 25. Plan to harvest cold-sensitive crops before this date or protect them with row covers.
How long is the growing season in Oklahoma?
Oklahoma has an average growing season of 210 days, from the last frost (Mar 30) to first frost (Oct 25). This long season supports warm-season crops like tomatoes, peppers, and melons.
Plan Your Garden
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