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Crop Planting Dates in Oklahoma

Published planting and harvest windows for 9 crops in Oklahoma, in one calendar. Ranges only, with sources.

Windows in Oklahoma
CropPlantingHarvest
Alfalfa hayApr 20 to Oct 13
CornPlanting: Mar 21 to May 17Aug 20 to Oct 20
CottonPlanting: May 2 to Jun 18Oct 4 to Dec 24
PeanutsPlanting: Apr 28 to Jun 11Oct 2 to Nov 26
SorghumPlanting: Apr 24 to Jul 6Sep 9 to Dec 2
SoybeansPlanting: Apr 15 to Jul 9Sep 9 to Dec 1
Spring oatsPlanting: Feb 15 to Mar 26Jun 4 to Jul 13
SunflowersPlanting: May 1 to Jul 30Aug 1 to Dec 10
Winter wheatPlanting: Sep 3 to Nov 6Jun 1 to Jul 3

Calendar view

Planting calendar for Oklahoma
ItemJanFebMarAprMayJunJulAugSepOctNovDec
Alfalfa hay harvestHarvest window in AprilHarvest window in MayHarvest window in JuneHarvest window in JulyHarvest window in AugustHarvest window in SeptemberHarvest window in October
Corn plantingPlanting window in MarchPlanting window, most active in AprilPlanting window, most active in May
Corn harvestHarvest window, most active in AugustHarvest window, most active in SeptemberHarvest window, most active in October
Cotton plantingPlanting window, most active in MayPlanting window, most active in June
Cotton harvestHarvest window, most active in OctoberHarvest window, most active in NovemberHarvest window, most active in December
Peanuts plantingPlanting window in AprilPlanting window, most active in MayPlanting window, most active in June
Peanuts harvestHarvest window, most active in OctoberHarvest window, most active in November
Sorghum plantingPlanting window in AprilPlanting window, most active in MayPlanting window, most active in JunePlanting window in July
Sorghum harvestHarvest window, most active in SeptemberHarvest window, most active in OctoberHarvest window, most active in NovemberHarvest window in December
Soybeans plantingPlanting window, most active in AprilPlanting window, most active in MayPlanting window, most active in JunePlanting window in July
Soybeans harvestHarvest window, most active in SeptemberHarvest window, most active in OctoberHarvest window, most active in NovemberHarvest window in December
Spring oats plantingPlanting window, most active in FebruaryPlanting window, most active in March
Spring oats harvestHarvest window, most active in JuneHarvest window, most active in July
Sunflowers plantingPlanting window, most active in MayPlanting window, most active in JunePlanting window, most active in July
Sunflowers harvestHarvest window, most active in AugustHarvest window, most active in SeptemberHarvest window, most active in OctoberHarvest window in NovemberHarvest window in December
Winter wheat plantingPlanting window, most active in SeptemberPlanting window, most active in OctoberPlanting window in November
Winter wheat harvestHarvest window, most active in JuneHarvest window in July
Frost-date caveat: published dates are averages. Find your own last and first frost dates and compare them with these ranges before you plant.

Last reviewed: November 2026. Source: USDA NASS, Field Crops Usual Planting and Harvesting Dates (October 2010 edition, copy hosted by Cornell University Mann Library). Dates are the usual start and end of the period when about 5% to 95% of the crop is planted or harvested, from long-run state progress data. They are historic averages, not a forecast.