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Crop dates by placeLeeks Planting Dates by State and Region
Published leeks planting windows for 5 places, with the source and the caveats you need before you use them.
| Place | Planting | Harvest |
|---|---|---|
| Central and higher-elevation Eastern Oregon | Transplanting: May (transplant) | |
| Columbia and Snake River valleys, Oregon | Planting: April | |
| Oregon Coast | Planting: April | |
| Western Oregon | Planting: March (if soil is dry enough) | |
| Western valleys (Portland, Roseburg, Medford), Oregon | Planting: April |
Calendar view
| Item | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Central and higher-elevation Eastern Oregon transplanting | Transplanting window in May | |||||||||||
| Columbia and Snake River valleys, Oregon planting | Planting window in April | |||||||||||
| Oregon Coast planting | Planting window in April | |||||||||||
| Western Oregon planting | Planting window in March | |||||||||||
| Western valleys (Portland, Roseburg, Medford), Oregon planting | Planting 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.
Related guides
Last reviewed: November 2026. Source: OSU Extension may (transplant) garden calendar.