When to plant lettuce in Riverside
Common questions
When can I sow lettuce outdoors in Riverside?
Direct-sow around mid January (Jan 19–Feb 9) in Riverside, based on its local frost dates. Confidence 78%.
When will lettuce be ready to harvest in Riverside?
Expect to harvest from around mid March (Mar 12–Mar 27) in Riverside, based on its local frost dates. Confidence 70%.
When should I start lettuce seeds indoors in Riverside?
Start seeds indoors around mid January (Jan 19–Feb 9) in Riverside, based on its local frost dates. Confidence 74%.
When can I transplant lettuce outdoors in Riverside?
Transplant outdoors around late January (Jan 26–Feb 16) in Riverside, based on its local frost dates. Confidence 78%.
Can I plant lettuce in autumn in Riverside?
Yes — Riverside supports a second, autumn sowing of lettuce around early September (Sep 2–Sep 16), timed to mature before the first fall frost.
How long is the growing season in Riverside?
Riverside has roughly 293 frost-free days, which is enough time to grow lettuce to maturity outdoors.
Sow lettuce 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 Riverside's frost dates.