When to plant swiss chard in Philadelphia
Common questions
When can I sow swiss chard outdoors in Philadelphia?
Direct-sow around late March (Mar 23–Apr 13) in Philadelphia, based on its local frost dates. Confidence 84%.
When will swiss chard be ready to harvest in Philadelphia?
Expect to harvest from around mid May (May 12–May 22) in Philadelphia, based on its local frost dates. Confidence 78%.
When should I start swiss chard 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 swiss chard outdoors in Philadelphia?
Transplant outdoors around late March (Mar 23–Apr 13) in Philadelphia, based on its local frost dates. Confidence 84%.
Can I plant swiss chard in autumn in Philadelphia?
Yes — Philadelphia supports a second, autumn sowing of swiss chard 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 swiss chard to maturity outdoors.
Sow swiss chard 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.