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Crop Planting Dates in Oregon

Published planting and harvest windows for 6 crops in Oregon, in one calendar. Ranges only, with sources.

Windows in Oregon
CropPlantingHarvest
Alfalfa hayMay 5 to Sep 20
CornPlanting: Mar 25 to Jun 15Oct 10 to Dec 5
Fall oatsPlanting: Sep 15 to Dec 10Jul 10 to Sep 1
Spring barleyPlanting: Mar 1 to May 25Jul 10 to Sep 8
Spring wheatPlanting: Mar 1 to May 6Jul 20 to Sep 3
Winter wheatPlanting: Sep 15 to Dec 1Jul 10 to Aug 23

Calendar view

Planting calendar for Oregon
ItemJanFebMarAprMayJunJulAugSepOctNovDec
Alfalfa hay harvestHarvest window in MayHarvest window in JuneHarvest window in JulyHarvest window in AugustHarvest window in September
Corn plantingPlanting window in MarchPlanting window, most active in AprilPlanting window, most active in MayPlanting window, most active in June
Corn harvestHarvest window, most active in OctoberHarvest window, most active in NovemberHarvest window in December
Fall oats plantingPlanting window in SeptemberPlanting window, most active in OctoberPlanting window, most active in NovemberPlanting window in December
Fall oats harvestHarvest window in JulyHarvest window, most active in AugustHarvest window in September
Spring barley plantingPlanting window, most active in MarchPlanting window, most active in AprilPlanting window, most active in May
Spring barley harvestHarvest window, most active in JulyHarvest window, most active in AugustHarvest window, most active in September
Spring wheat plantingPlanting window, most active in MarchPlanting window, most active in AprilPlanting window in May
Spring wheat harvestHarvest window, most active in JulyHarvest window, most active in AugustHarvest window, most active in September
Winter wheat plantingPlanting window in SeptemberPlanting window, most active in OctoberPlanting window, most active in NovemberPlanting window in December
Winter wheat harvestHarvest window, most active in JulyHarvest window, most active in August
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.