When to plant swiss chard in Seattle
Common questions
When can I sow swiss chard outdoors in Seattle?
Direct-sow around early March (Mar 3–Mar 24) in Seattle, based on its local frost dates. Confidence 83%.
When will swiss chard be ready to harvest in Seattle?
Expect to harvest from around late April (Apr 22–May 2) in Seattle, based on its local frost dates. Confidence 75%.
When should I start swiss chard 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 swiss chard outdoors in Seattle?
Transplant outdoors around early March (Mar 3–Mar 24) in Seattle, based on its local frost dates. Confidence 83%.
Can I plant swiss chard in autumn in Seattle?
Yes — Seattle supports a second, autumn sowing of swiss chard 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 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 Seattle's frost dates.