State agricultural overview

Oklahoma crop calendar.

Zone 7a
Range 6b to 8a
200-day season
Last frost April 10
First frost October 25

17 primary crops with planting windows for Oklahoma. Calendar timing is anchored to 7a dominant hardiness zone and a 200-day growing season — verify against Oklahoma State University Extension for variety- and county-specific guidance.

Row Crop · Oklahoma

Corn
primary
Spring: April 10 – May 1
Grain Sorghum
primary
Spring: May 1 – May 29
Soybeans
primary
Spring: April 24 – May 15
Sunflowers
primary
Spring: April 17 – May 15
Winter Wheat
primary
Fall: October 18 – November 8
Cotton
secondary
Spring: April 24 – May 15

Vegetables · Oklahoma

Cucumbers
primary
Spring: April 24 – May 29
Peppers
primary
Spring: May 1 – May 22
Potatoes
primary
Spring: March 27 – April 17
Fall: August 11 – August 26
Pumpkins
primary
Spring: May 1 – May 29
Sweet Corn
primary
Spring: April 10 – May 15
Tomatoes
primary
Spring: April 24 – May 15

Forages · Oklahoma

Alfalfa
primary
Spring: April 3 – May 1
Fall: August 26 – September 10
Clover
primary
Spring: March 20 – April 17
Fall: August 26 – September 10

Cover Crops · Oklahoma

Brassicas
primary
Fall: August 11 – August 26
Buckwheat
primary
Spring: June 5 – July 3
Cereal Oats
primary
Spring: April 3 – May 1
Fall: August 26 – September 10
Winter Rye
primary
Fall: October 18 – November 8

Frost & extension reference

Oklahoma climate anchors.

Last frost

April 10

First frost

October 25

Growing season

200 days

Hardiness zone

Oklahoma county-level frost dates →Oklahoma State University Extension →

Oklahoma planting timing. Live alerts.

Bield: Farm ties weather and soil-temperature stations in your county to crop planting thresholds — get notified the day soil temp clears your target window.

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