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Crop dates by placeSummer squash Planting Dates by State and Region
Published summer squash planting windows for 3 places, with the source and the caveats you need before you use them.
Across the 3 places in this data set, the planting window begins as early as Apr 1 (Columbia and Snake River valleys, Oregon) and as late as May 1 (Oregon Coast). The middle of the range starts around May 1.
| Place | Planting | Harvest |
|---|---|---|
| Columbia and Snake River valleys, Oregon | Planting: April | |
| Oregon Coast | Planting: May | |
| Western valleys (Portland, Roseburg, Medford), Oregon | Planting: May |
Calendar view
| Item | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Columbia and Snake River valleys, Oregon planting | Planting window in April | |||||||||||
| Oregon Coast planting | Planting window in May | |||||||||||
| Western valleys (Portland, Roseburg, Medford), Oregon planting | Planting window in May |
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: OSU Extension april garden calendar.