Home › Sweet Potato › Grow in Washington
Can You Grow Sweet Potato in Washington?
US · USDA Zone 8b · zones 4b, 5a, 5b, 6a, 6b, 7a, 7b, 8a, 8b
Sweet potatoes grow well here — they love the warm season your zone provides.
Plant zones
Washington last frost
Washington first frost
Days to harvest
When to plant Sweet Potatoes in Washington
Direct sow
Harvest
Dates are approximate, based on Washington's average frost dates. Your exact yard may vary by microclimate.
About Sweet Potato
Sweet potatoes need a long warm season and thrive in heat — they are a subtropical crop at heart.
Plant slips (rooted cuttings) after soil warms to 18°C. They sprawl — give them space or train vertically. Cure harvested tubers at 30°C for a week to develop sweetness and improve storage.
Gardening in Washington
Washington has dramatically different climates. The wet maritime west (Zone 8a-8b) is mild and productive year-round. Eastern Washington is semi-arid and colder (Zone 5-6) with hot dry summers.
Frequently asked questions
Can you grow Sweet Potato in Washington?
Sweet potatoes grow well here — they love the warm season your zone provides.
What zone is Washington?
Washington spans USDA Zone 8b (4b, 5a, 5b, 6a, 6b, 7a, 7b, 8a, 8b).
When do you plant Sweet Potatoes in Washington?
Plant Sweet Potatoes Jan 30, harvest Apr 30 – May 30.