When to plant kale in Denver
Common questions
When can I sow kale outdoors in Denver?
Direct-sow around mid April (Apr 13–May 4) in Denver, based on its local frost dates. Confidence 85%.
When will kale be ready to harvest in Denver?
Expect to harvest from around early June (Jun 7–Jun 27) in Denver, based on its local frost dates. Confidence 76%.
When should I start kale seeds indoors in Denver?
Start seeds indoors around late March (Mar 23–Apr 13) in Denver, based on its local frost dates. Confidence 81%.
When can I transplant kale outdoors in Denver?
Transplant outdoors around mid April (Apr 13–May 4) in Denver, based on its local frost dates. Confidence 85%.
Can I plant kale in autumn in Denver?
Yes — Denver supports a second, autumn sowing of kale around early July (Jul 6–Jul 20), timed to mature before the first fall frost.
How long is the growing season in Denver?
Denver has roughly 157 frost-free days, which is enough time to grow kale to maturity outdoors.
Sow kale 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 Denver's frost dates.