Oklahoma Planting Guide & Growing Season
Oklahoma is in USDA hardiness zone with a growing season of 210 days. The average last spring frost is Mar 15 - Apr 15 and the average first fall frost is Oct 15 - Nov 1.
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) | Mar 15 - Apr 15 | Oct 15 - Nov 1 | 210 | |
| Alabama (AL) | Mar 1 - Apr 1 | Oct 25 - Nov 15 | 220 | |
| Alaska (AK) | May 15 - Jun 15 | Aug 15 - Sep 15 | 105 | |
| Arizona (AZ) | Feb 1 - Apr 15 | Oct 15 - Dec 15 | 270 | |
| Arkansas (AR) | Mar 15 - Apr 15 | Oct 15 - Nov 1 | 210 | |
| California (CA) | Jan 15 - Apr 15 | Oct 15 - Dec 31 | 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 15 - Apr 15. Start most seeds indoors 6-8 weeks before this date. The USDA hardiness zone for Oklahoma is undefined, with a growing season of approximately 210 days.
What USDA hardiness zone is Oklahoma?
Oklahoma falls in USDA hardiness zones undefined. 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 15 - Nov 1. 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 15 - Apr 15) to first frost (Oct 15 - Nov 1). This long season supports warm-season crops like tomatoes, peppers, and melons.
Plan Your Garden
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