When to plant lettuce in Philadelphia
Common questions
When can I sow lettuce outdoors in Philadelphia?
Direct-sow around early March (Mar 2–Mar 23) in Philadelphia, based on its local frost dates. Confidence 84%.
When will lettuce be ready to harvest in Philadelphia?
Expect to harvest from around late April (Apr 21–May 6) in Philadelphia, based on its local frost dates. Confidence 78%.
When should I start lettuce seeds indoors in Philadelphia?
Start seeds indoors around late February (Feb 28–Mar 21) in Philadelphia, based on its local frost dates. Confidence 83%.
When can I transplant lettuce outdoors in Philadelphia?
Transplant outdoors around early March (Mar 7–Mar 28) in Philadelphia, based on its local frost dates. Confidence 87%.
Can I plant lettuce in autumn in Philadelphia?
Yes — Philadelphia supports a second, autumn sowing of lettuce around mid August (Aug 18–Sep 1), timed to mature before the first fall frost.
How long is the growing season in Philadelphia?
Philadelphia has roughly 234 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 Philadelphia's frost dates.