When to Plant in San Francisco, CA

San Francisco's gardening climate is one of the most unique in the country. The city is nearly frost-free year-round (Zone 10a/10b) but compensates with cool, foggy summers that make it one of the worst places in California for traditional warm-season crops. Tomatoes that thrive in San Jose often sulk in the Sunset District.

The secret to San Francisco gardening is leaning into the cool, foggy climate rather than fighting it. Cool-season crops — kale, lettuce, chard, broccoli, fava beans, and herbs — grow beautifully year-round. Choose fog-tolerant tomato varieties like Stupice or Early Girl and plant them in the sunniest spot you have.

FAQ

Can I grow tomatoes in San Francisco?

Yes, but choose fog-tolerant varieties like Stupice, Early Girl, Siletz, or Legend. Plant in your sunniest, most wind-protected spot. September is often the best harvest month when fog eases.

What vegetables grow best in San Francisco?

Cool-season crops are king: kale, chard, lettuce, broccoli, fava beans, herbs, and root vegetables all grow beautifully year-round. Lean into the fog rather than fighting it.

When is the last frost date in San Francisco?

San Francisco is essentially frost-free — the average low in January is 46°F. Most neighborhoods see frost only once per decade, if at all. Zone 10a/10b.

Why is it hard to grow tomatoes in San Francisco?

The city's famous fog keeps summer temperatures cool (often 58–65°F) and limits the sunlight tomatoes need for ripening. Inland cities like San Jose get 10–15°F warmer and produce much higher tomato yields.

How does Plan My Garden help San Francisco gardeners?

Enter your San Francisco zip code and we'll build a personalized planting schedule calibrated to the Bay Area's unique foggy microclimate.

Frost dates for San Francisco ZIP codes

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