Cool-Season Vegetable

When to Plant Lettuce in California

Fast-growing and forgiving. Plant in spring and fall for a nearly year-round supply of fresh salad greens.

The Short Answer

California is America's lettuce capital — the Salinas Valley alone produces roughly 70% of the nation's lettuce. Home gardeners in most of the state can grow lettuce year-round with the right variety selection and timing. Coastal California's mild, foggy conditions are essentially lettuce paradise, while inland valleys need to work around summer heat. The diversity of microclimates means there's almost always somewhere in California where lettuce is thriving.

California Frost Dates

Your planting dates depend on which part of California you're in. Here are the frost date ranges by region:

Region Zones Last Frost (Spring) First Frost (Fall)
Northern California Mountains 5a, 5b, 6a, 6b May 1 - May 25 Sep 20 - Oct 15
Central Valley 9a, 9b Feb 10 - Mar 1 Nov 15 - Dec 5
Southern California Coast 10a, 10b, 11a Jan 1 - Feb 1 Dec 10 - Jan 1
Bay Area 9b, 10a Jan 20 - Feb 15 Nov 25 - Dec 15

Lettuce Planting Schedule for California

Northern California Mountains (Zones 5a, 5b, 6a, 6b)

Average last frost: May 1 - May 25 · Average first frost: Sep 20 - Oct 15

Start Seeds Indoors
4 wks before frost
Transplant Outside
2 wks before frost
Direct Sow
4 wks before frost
Fall Planting
8 wks before first frost

Central Valley (Zones 9a, 9b)

Average last frost: Feb 10 - Mar 1 · Average first frost: Nov 15 - Dec 5

Start Seeds Indoors
4 wks before frost
Transplant Outside
2 wks before frost
Direct Sow
4 wks before frost
Fall Planting
8 wks before first frost

Southern California Coast (Zones 10a, 10b, 11a)

Average last frost: Jan 1 - Feb 1 · Average first frost: Dec 10 - Jan 1

Start Seeds Indoors
4 wks before frost
Transplant Outside
2 wks before frost
Direct Sow
4 wks before frost
Fall Planting
8 wks before first frost

Bay Area (Zones 9b, 10a)

Average last frost: Jan 20 - Feb 15 · Average first frost: Nov 25 - Dec 15

Start Seeds Indoors
4 wks before frost
Transplant Outside
2 wks before frost
Direct Sow
4 wks before frost
Fall Planting
8 wks before first frost

Growing Lettuce in California

State-Specific Growing Tips

Bay Area and coastal: grow year-round. Lettuce never bolts in San Francisco's cool summers. Central Valley: plant October through March, take a summer break. Southern California coast: year-round with afternoon shade in summer. Inland Southern California: October through April. Mountain communities: traditional spring and fall seasons. California's dry climate means less foliar disease than eastern states, but irrigation management is critical — drip on a timer keeps soil consistently moist without wetting foliage.

Recommended Varieties for California

Everything grows somewhere in California. Coastal: grow the full range of butterheads, romaines, and crispheads. Inland: focus on bolt-resistant varieties during shoulder seasons (Jericho, Concept, Nevada). California seed companies (Renee's Garden, Botanical Interests) often develop varieties suited to the state's unique conditions. Baby leaf mixes for cut-and-come-again are extremely popular in California's year-round growing culture.

Common Challenges in California

Aphids are the primary pest — they're present nearly year-round in California's mild climate. Lettuce drop (Sclerotinia) appears in cool, wet conditions in the winter growing season. In the Central Valley, summer heat makes lettuce impossible without significant shade structure. Water management during drought is a consideration — lettuce is relatively water-efficient but needs consistent moisture.

Growing Tips

Succession plant every 2-3 weeks for continuous harvest. Shade cloth extends the season into warmer months.

Companion Planting

Plant lettuce alongside these companions for better growth:

Carrots Radishes Strawberries Chives

The Bottom Line

Lettuce can be grown successfully in California with proper attention to regional frost dates and local growing conditions. Timing varies across the state — Northern California Mountains gardeners work with a last frost around May 1 - May 25, while Bay Area sees frost end around Jan 20 - Feb 15. Choose varieties suited to your region, amend your soil based on its specific needs, and monitor for the pests and diseases most common in your area. For exact dates based on your zip code, use our free planting date finder.

Related Guides

Lettuce Growing Guide National planting guide with all states California Planting Calendar All plants for California Lettuce in Alabama Alabama planting dates Lettuce in Alaska Alaska planting dates Lettuce in Arizona Arizona planting dates Lettuce in Arkansas Arkansas planting dates
Note: All dates are based on NOAA 30-year Climate Normals and represent historical averages, not predictions for any specific year. Always check your local weather forecast before planting frost-sensitive crops. Learn about our data sources.

Last reviewed: March 29, 2026

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