What USDA hardiness zones are in California?
California spans USDA hardiness zones 4b-11a — which is to say winter's coldest night runs from about −25°F to 45°F depending where in California you are, averaged over 1991–2020 (USDA PHZM 2023).
Is it too late to plant in California?
Almost never — the real question is what to plant next. Across California, cool-season planting typically opens about four weeks before the local last hard freeze — county medians put that freeze near Feb 4, with the middle half of counties between Jan 19 and Mar 19 (NOAA 1991–2020 climate normals). Tender transplants wait two to three weeks past it, and fall planting counts back from first freezes mostly between Nov 29 and Dec 12 — long-season crops need about 90 days of runway, quick greens only 30. Here the calendar nearly circles: cool-season crops take the winter shift, and the next window is always close.
When does frost risk typically end in California?
Across California, the middle half of counties see their last hard freeze (28°F) between about Jan 19 and Mar 19, with a county median near Feb 4 (NOAA 1991–2020 climate normals). That marks the hard freeze, not the last light frost — lighter frosts keep biting past it, which is why tender transplants here wait until about Feb 25.
How long is the growing season in California?
Measured between 28°F hard freezes, growing seasons across California's counties mostly run about 278 to 331 days, with a county median near 317 (NOAA 1991–2020 climate normals). Tender crops get a somewhat shorter practical window, since lighter frosts reach a few weeks past the hard-freeze dates on both ends.
What vegetables grow well in California?
California's zones 4b-11a support a wide range — strong performers include Avocado, Meyer Lemon, Tomato, Grape, and Fig. What actually takes on any one site comes down to its soil, sun, and drainage, and we score each plant against the real conditions at your address.
Which hardiness zone is California, really?
Officially, California spans USDA zones 4b-11a (USDA PHZM 2023) — but a zone is a 30-year average of winter's coldest night across an area, and it can't see any one yard. A south-facing slope, a tree line, or a low frost pocket can shift a single site by half a zone either way, which is why neighboring gardeners often quote different numbers. We read the conditions at your exact address — soil, sun, slope, and frost — and score 1,086 plants against what's actually there.
Is the soil safe to grow vegetables in California?
The federal record across California runs heavier than most — 254,277 documented sites, mostly Brownfields entries (196,551) — so test the soil before planting food in the ground, and raised beds with clean imported soil grow well in the meantime. Even here, proximity to a documented site is information, not a diagnosis of any one yard; the contamination map shows exactly what's recorded and where.
Just moved to California — what should I know before planting?
Start with three facts. California spans USDA zones 4b-11a, which sets what survives winter; last hard freezes range from about Jan 19 to Mar 19 across its counties (NOAA 1991–2020 climate normals); and 254,277 documented sites sit on the federal record here, so a soil test before food beds is the smart first step. From there, matching plants to your actual soil and sun is the fun part.
