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Crop dates by place

Sunflowers Planting Dates by State and Region

Published sunflowers planting windows for 9 places, with the source and the caveats you need before you use them.

Across the 9 places in this data set, the planting window begins as early as Mar 21 (California) and as late as Jun 1 (Nebraska). The middle of the range starts around May 14.

Sunflowers windows by place
PlacePlantingHarvest
CaliforniaPlanting: Mar 21 to Aug 1Jun 1 to Oct 1
ColoradoPlanting: May 19 to Jul 1Sep 27 to Nov 26
KansasPlanting: May 15 to Jul 10Sep 15 to Nov 30
MinnesotaPlanting: May 7 to Jun 15Sep 26 to Nov 25
NebraskaPlanting: Jun 1 to Jul 5Oct 1 to Nov 5
North DakotaPlanting: May 14 to Jun 15Oct 1 to Nov 23
OklahomaPlanting: May 1 to Jul 30Aug 1 to Dec 10
South DakotaPlanting: May 16 to Jun 29Sep 25 to Nov 21
TexasPlanting: Apr 5 to Jul 15Aug 20 to Dec 3

Calendar view

Sunflowers calendar by place
ItemJanFebMarAprMayJunJulAugSepOctNovDec
California plantingPlanting window in MarchPlanting window, most active in AprilPlanting window, most active in MayPlanting window in JunePlanting window in JulyPlanting window in August
California harvestHarvest window in JuneHarvest window, most active in JulyHarvest window, most active in AugustHarvest window in SeptemberHarvest window in October
Colorado plantingPlanting window, most active in MayPlanting window, most active in JunePlanting window in July
Colorado harvestHarvest window in SeptemberHarvest window, most active in OctoberHarvest window, most active in November
Kansas plantingPlanting window, most active in MayPlanting window, most active in JunePlanting window in July
Kansas harvestHarvest window in SeptemberHarvest window, most active in OctoberHarvest window, most active in November
Minnesota plantingPlanting window, most active in MayPlanting window, most active in June
Minnesota harvestHarvest window in SeptemberHarvest window, most active in OctoberHarvest window, most active in November
Nebraska plantingPlanting window, most active in JunePlanting window in July
Nebraska harvestHarvest window, most active in OctoberHarvest window in November
North Dakota plantingPlanting window, most active in MayPlanting window, most active in June
North Dakota harvestHarvest window, most active in OctoberHarvest window, most active in November
Oklahoma plantingPlanting window, most active in MayPlanting window, most active in JunePlanting window, most active in July
Oklahoma harvestHarvest window, most active in AugustHarvest window, most active in SeptemberHarvest window, most active in OctoberHarvest window in NovemberHarvest window in December
South Dakota plantingPlanting window, most active in MayPlanting window, most active in June
South Dakota harvestHarvest window in SeptemberHarvest window, most active in OctoberHarvest window, most active in November
Texas plantingPlanting window in AprilPlanting window, most active in MayPlanting window, most active in JunePlanting window, most active in July
Texas harvestHarvest window in AugustHarvest window, most active in SeptemberHarvest window, most active in OctoberHarvest window, most active in NovemberHarvest window in December
Frost-date caveat: ranges blur real differences inside a state or region. Use them to plan, then fit them to your last frost date, soil temperature and field conditions.

Related guides

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.