When to plant swiss chard in Washington
Common questions
When can I sow swiss chard outdoors in Washington?
Direct-sow around mid March (Mar 12–Apr 2) in Washington, based on its local frost dates. Confidence 86%.
When will swiss chard be ready to harvest in Washington?
Expect to harvest from around early May (May 1–May 11) in Washington, based on its local frost dates. Confidence 80%.
When should I start swiss chard seeds indoors in Washington?
Start seeds indoors around late February (Feb 24–Mar 17) in Washington, based on its local frost dates. Confidence 85%.
When can I transplant swiss chard outdoors in Washington?
Transplant outdoors around mid March (Mar 12–Apr 2) in Washington, based on its local frost dates. Confidence 86%.
Can I plant swiss chard in autumn in Washington?
Yes — Washington supports a second, autumn sowing of swiss chard around mid August (Aug 15–Aug 29), timed to mature before the first fall frost.
How long is the growing season in Washington?
Washington 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 Washington's frost dates.