When to plant lettuce in San Bernardino
Common questions
When can I sow lettuce outdoors in San Bernardino?
Direct-sow around late December (Dec 26–Jan 16) in San Bernardino, based on its local frost dates. Confidence 76%.
When will lettuce be ready to harvest in San Bernardino?
Expect to harvest from around early February (Feb 9–Feb 24) in San Bernardino, based on its local frost dates. Confidence 70%.
When should I start lettuce seeds indoors in San Bernardino?
Start seeds indoors around late January (Jan 26–Feb 16) in San Bernardino, based on its local frost dates. Confidence 74%.
When can I transplant lettuce outdoors in San Bernardino?
Transplant outdoors around late December (Dec 26–Jan 16) in San Bernardino, based on its local frost dates. Confidence 76%.
Can I plant lettuce in autumn in San Bernardino?
Yes — San Bernardino supports a second, autumn sowing of lettuce around early September (Sep 5–Sep 19), timed to mature before the first fall frost.
How long is the growing season in San Bernardino?
San Bernardino has roughly 284 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 San Bernardino's frost dates.