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Crop dates by place

Rhubarb Planting Dates by State and Region

Published rhubarb planting windows for 7 places, with the source and the caveats you need before you use them.

Across the 7 places in this data set, the planting window begins as early as Mar 1 (Western Oregon) and as late as Apr 9 (Northern Illinois). The middle of the range starts around Apr 1.

Rhubarb windows by place
PlacePlantingHarvest
Central IllinoisPlanting: March 25 to May 15, July 21 to Aug. 1
Columbia and Snake River valleys, OregonPlanting: April
MinnesotaPlanting: mid april
Northern IllinoisPlanting: April 9 to May 30, Aug. 3 to 15
Southern IllinoisPlanting: March 11 to May 1, July 7 to 14
Western OregonPlanting: March (if soil is dry enough)
Western valleys (Portland, Roseburg, Medford), OregonPlanting: April

Calendar view

Rhubarb calendar by place
ItemJanFebMarAprMayJunJulAugSepOctNovDec
Central Illinois plantingPlanting window in MarchPlanting window in AprilPlanting window in MayPlanting window in JulyPlanting window in August
Columbia and Snake River valleys, Oregon plantingPlanting window in April
Minnesota plantingPlanting window in April
Northern Illinois plantingPlanting window in AprilPlanting window in MayPlanting window in August
Southern Illinois plantingPlanting window in MarchPlanting window in AprilPlanting window in MayPlanting window in July
Western Oregon plantingPlanting window in March
Western valleys (Portland, Roseburg, Medford), Oregon plantingPlanting window in April
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.

Last reviewed: November 2026. Source: Illinois Extension - When to Plant (Home Vegetable Gardening).