When to plant swiss chard in Osaka
Common questions
When can I sow swiss chard outdoors in Osaka?
Direct-sow around late March (Mar 27–Apr 17) in Osaka, based on its local frost dates. Confidence 45%.
When will swiss chard be ready to harvest in Osaka?
Expect to harvest from around mid May (May 16–May 26) in Osaka, based on its local frost dates. Confidence 40%.
When should I start swiss chard seeds indoors in Osaka?
Start seeds indoors around mid March (Mar 13–Apr 3) in Osaka, based on its local frost dates. Confidence 43%.
When can I transplant swiss chard outdoors in Osaka?
Transplant outdoors around late March (Mar 27–Apr 17) in Osaka, based on its local frost dates. Confidence 45%.
Can I plant swiss chard in autumn in Osaka?
Yes — Osaka supports a second, autumn sowing of swiss chard around late August (Aug 26–Sep 9), timed to mature before the first fall frost.
How long is the growing season in Osaka?
Osaka has roughly 228 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 Osaka's frost dates.