When to plant kale in Philadelphia
Common questions
When can I sow kale outdoors in Philadelphia?
Direct-sow around early March (Mar 7–Mar 28) in Philadelphia, based on its local frost dates. Confidence 87%.
When will kale be ready to harvest in Philadelphia?
Expect to harvest from around early May (May 1–May 21) in Philadelphia, based on its local frost dates. Confidence 78%.
When should I start kale seeds indoors in Philadelphia?
Start seeds indoors around mid February (Feb 14–Mar 7) in Philadelphia, based on its local frost dates. Confidence 83%.
When can I transplant kale 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 kale in autumn in Philadelphia?
Yes — Philadelphia supports a second, autumn sowing of kale 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 kale to maturity outdoors.
Sow kale 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.