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Pumpkins planting and harvest dates

Pumpkins Planting Dates in Western valleys (Portland, Roseburg, Medford), Oregon

Usual pumpkins planting periods in Western valleys (Portland, Roseburg, Medford), Oregon, shown as ranges with their source. Use them to frame a plan, then adjust for your own frost dates and soil temperature.

Pumpkins dates in Western valleys (Portland, Roseburg, Medford), Oregon
ActivityWindowSourceLast verified
PlantingMaysource2026-11-11
Pumpkins calendar for Western valleys (Portland, Roseburg, Medford), Oregon
ItemJanFebMarAprMayJunJulAugSepOctNovDec
PlantingPlanting window in May

What these dates mean in Western valleys (Portland, Roseburg, Medford), Oregon

Planting usually runs about 31 days, from May 1 to May 31.

That start date is close to the middle of the 3 places in this data set that report pumpkins planting dates (May 1).

Frost-date caveat: these are published ranges for Western valleys (Portland, Roseburg, Medford), Oregon. A northern or high-elevation site will run later than a southern or low one, and a cold wet spring can push planting past the window. Monthly advice is not applicable to all areas of Oregon; frost dates and local conditions vary. Check your last spring frost and soil temperature, and confirm with your county extension office.

Related guides

Pumpkins dates in other places

Other crops in Western valleys (Portland, Roseburg, Medford), Oregon

Last reviewed: November 2026. Source: OSU Extension may garden calendar.