When to plant swiss chard in Boise
Common questions
When can I sow swiss chard outdoors in Boise?
Direct-sow around mid April (Apr 18–May 9) in Boise, based on its local frost dates. Confidence 89%.
When will swiss chard be ready to harvest in Boise?
Expect to harvest from around early June (Jun 7–Jun 17) in Boise, based on its local frost dates. Confidence 80%.
When should I start swiss chard seeds indoors in Boise?
Start seeds indoors around early April (Apr 4–Apr 25) in Boise, based on its local frost dates. Confidence 85%.
When can I transplant swiss chard outdoors in Boise?
Transplant outdoors around mid April (Apr 18–May 9) in Boise, based on its local frost dates. Confidence 89%.
Can I plant swiss chard in autumn in Boise?
Yes — Boise supports a second, autumn sowing of swiss chard around early July (Jul 8–Jul 22), timed to mature before the first fall frost.
How long is the growing season in Boise?
Boise has roughly 168 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 Boise's frost dates.