When to plant lettuce in Seattle
Common questions
When can I sow lettuce outdoors in Seattle?
Direct-sow around late December (Dec 26–Jan 16) in Seattle, based on its local frost dates. Confidence 81%.
When will lettuce be ready to harvest in Seattle?
Expect to harvest from around early February (Feb 9–Feb 24) in Seattle, based on its local frost dates. Confidence 75%.
When should I start lettuce seeds indoors in Seattle?
Start seeds indoors around mid February (Feb 17–Mar 10) in Seattle, based on its local frost dates. Confidence 79%.
When can I transplant lettuce outdoors in Seattle?
Transplant outdoors around late December (Dec 26–Jan 16) in Seattle, based on its local frost dates. Confidence 81%.
Can I plant lettuce in autumn in Seattle?
Yes — Seattle supports a second, autumn sowing of lettuce around early August (Aug 10–Aug 24), timed to mature before the first fall frost.
How long is the growing season in Seattle?
Seattle has roughly 237 frost-free days, which is enough time to grow lettuce to maturity outdoors.
Sow lettuce as soon as the soil is workable — it tolerates cool weather and light frost. Every date on this page is derived from that rule and Seattle's frost dates.