When to plant winter squash / pumpkin in Washington
Common questions
When can I sow winter squash / pumpkin outdoors in Washington?
Direct-sow around late April (Apr 30–May 21) in Washington, based on its local frost dates. Confidence 86%.
When will winter squash / pumpkin be ready to harvest in Washington?
Expect to harvest from around late July (Jul 24–Aug 28) in Washington, based on its local frost dates. Confidence 80%.
When should I start winter squash / pumpkin seeds indoors in Washington?
Start seeds indoors around mid March (Mar 17–Apr 7) in Washington, based on its local frost dates. Confidence 85%.
When can I transplant winter squash / pumpkin outdoors in Washington?
Transplant outdoors around late April (Apr 30–May 21) in Washington, based on its local frost dates. Confidence 86%.
How long is the growing season in Washington?
Washington has roughly 234 frost-free days, which is enough time to grow winter squash / pumpkin to maturity outdoors.
Sow winter squash / pumpkin 6–8 weeks before your last spring frost; plant out 2–3 weeks after it. Every date on this page is derived from that rule and Washington's frost dates.