When to plant cauliflower in Seattle
Common questions
When will cauliflower be ready to harvest in Seattle?
Expect to harvest from around early May (May 2–May 27) in Seattle, based on its local frost dates. Confidence 75%.
When should I start cauliflower seeds indoors in Seattle?
Start seeds indoors around early February (Feb 3–Feb 24) in Seattle, based on its local frost dates. Confidence 79%.
When can I transplant cauliflower outdoors in Seattle?
Transplant outdoors around early March (Mar 3–Mar 24) in Seattle, based on its local frost dates. Confidence 83%.
Can I plant cauliflower in autumn in Seattle?
Yes — Seattle supports a second, autumn sowing of cauliflower around mid July (Jul 16–Jul 30), timed to mature before the first fall frost.
How long is the growing season in Seattle?
Seattle has roughly 237 frost-free days, which is enough time to grow cauliflower to maturity outdoors.
Sow cauliflower 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 Seattle's frost dates.