Washington planting dates for potatoes
Dates for Washington vary significantly by region. Use the average frost date lookup for your specific ZIP code, then apply the standard offsets: direct sow 2 weeks before last frost.
Why these dates
Potatoes are cool-season but frost-sensitive. Plant seed potatoes 2-3 weeks before last frost when soil reaches 45-50F at 4 inches deep.
The dates above are anchored to Washington's average last spring frost date of 04-15 (W) to 05-25 (E), with offsets standard across university Extension publications. For zone-specific local timing, use the frost date lookup tool with your ZIP code.
More on growing potatoes
The full growing guide for potatoes - varieties, soil, fertilization, pests, harvest, storage - is here: Potatoes growing guide.
More Washington planting information
- Full Washington planting calendar (all crops + ornamentals)
- Find your exact USDA zone by ZIP
- Look up your average frost dates
- Seed starting timeline calculator