When to plant kale in San Jose
Common questions
When can I sow kale outdoors in San Jose?
Direct-sow around late December (Dec 25–Jan 15) in San Jose, based on its local frost dates. Confidence 80%.
When will kale be ready to harvest in San Jose?
Expect to harvest from around mid February (Feb 18–Mar 10) in San Jose, based on its local frost dates. Confidence 74%.
When should I start kale seeds indoors in San Jose?
Start seeds indoors around early January (Jan 1–Jan 22) in San Jose, based on its local frost dates. Confidence 78%.
When can I transplant kale outdoors in San Jose?
Transplant outdoors around late December (Dec 25–Jan 15) in San Jose, based on its local frost dates. Confidence 80%.
Can I plant kale in autumn in San Jose?
Yes — San Jose supports a second, autumn sowing of kale around late August (Aug 29–Sep 12), timed to mature before the first fall frost.
How long is the growing season in San Jose?
San Jose has roughly 294 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 San Jose's frost dates.