When to plant summer squash / zucchini in San Bernardino
Common questions
When can I sow summer squash / zucchini outdoors in San Bernardino?
Direct-sow around early April (Apr 10–May 1) in San Bernardino, based on its local frost dates. Confidence 76%.
When will summer squash / zucchini be ready to harvest in San Bernardino?
Expect to harvest from around late May (May 25–Jun 9) in San Bernardino, based on its local frost dates. Confidence 70%.
When should I start summer squash / zucchini seeds indoors in San Bernardino?
Start seeds indoors around early March (Mar 8–Mar 29) in San Bernardino, based on its local frost dates. Confidence 74%.
When can I transplant summer squash / zucchini outdoors in San Bernardino?
Transplant outdoors around early April (Apr 10–May 1) in San Bernardino, based on its local frost dates. Confidence 76%.
How long is the growing season in San Bernardino?
San Bernardino has roughly 284 frost-free days, which is enough time to grow summer squash / zucchini to maturity outdoors.
Sow summer squash / zucchini 6–8 weeks before your last spring frost; plant out 2–3 weeks after it. Every date on this page is derived from that rule and San Bernardino's frost dates.