The California Central Valley spans USDA hardiness zones 9a-9b — a band that supports both cool-season staples and warm-season crops chosen to fit the local frost window.
A vast flat alluvial trough with hot dry summers and rich soils — one of the most productive agricultural regions on earth, from almonds and stone fruit to row crops. Growers here do well with avocado, meyer lemon, tomato, and grape — with the usual caveat that any single yard's soil, sun, and drainage cast the deciding vote.
The California Central Valley spans California. Its footprint follows the EPA Level III ecoregion boundary; the counties linked below are representative of the region, not an exhaustive list.
Your yard isn't the whole California Central Valley.
The California Central Valley spans USDA zones 9a-9b, but your parcel sits in exactly one — and slope, tree cover, and low spots nudge it further. Enter your address and we'll score 1,112 plants against your land's actual soil, sun, and frost.
We read public map data for this spot — soil, climate, flood, and parcel records. How we handle your address.
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Quick Facts
USDA Zones
9a-9b
States
1
Counties
11
Defined by
Ecoregion
Hardiness Zone Range
What Grows in the California Central Valley
Plants matched to the California Central Valley's USDA zones 9a-9b — each links to its full growing profile.
Native Plants Suited to the California Central Valley
US-native plants (USDA PLANTS, Lower 48) whose hardiness range overlaps the California Central Valley’s USDA zones 9a-9b. Zone overlap is a starting filter, not a range map — for plants documented native to your county, your state’s Cooperative Extension or a native-plant society is the authority.
Safe to Grow Here?
What the federal record shows across the California Central Valley — and how to grow with it.
A growing region spans many local records, and contamination is a per-place fact — not a regional verdict. Nationwide we track 1.8M documented sites across 9 federal source types; open the map outlined to the California Central Valley to see exactly what's on record where you grow.
Sources: EPA, USGS — 1.8M documented sites tracked nationwide across 9 federal source types.
Your Specific Parcel Matters
the California Central Valley Average
- ●USDA Zones 9a-9b
- ●Generic soil type for the area
- ●State-average frost dates
YOUR Parcel
- ✓Your exact hardiness zone
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your parcel in the California Central Valley
Pull a site-specific report for your exact address in the California Central Valley — soil, sun, drainage, frost risk, contamination, and scored plant recommendations.
Three things about your exact spot that zone averages miss:
We read public map data for this spot — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources analyzed in seconds
Key Growing Facts for the California Central Valley
- USDA Hardiness Zones: 9a-9b (USDA PHZM 2023, aggregated across the region)
- States: California
- Counties covered: 11
- Region boundary: an EPA Level III ecoregion (an area sharing climate, soils, and vegetation)
Zone data: USDA ARS Plant Hardiness Zone Map 2023. Region boundary: curated county clusters and EPA Level III ecoregions. County boundaries: US Census TIGER/Line 2025.
Frequently Asked Questions
What hardiness zone is the California Central Valley?
The California Central Valley spans USDA hardiness zones 9a-9b, aggregated from the USDA Agricultural Research Service Plant Hardiness Zone Map 2023 across the region's counties. Zones reflect average annual extreme minimum temperatures from 1991–2020 data.
What grows well in the California Central Valley?
The California Central Valley's conditions suit plants such as Avocado, Meyer Lemon, Tomato, Grape, Fig, California Poppy. For site-specific recommendations scored against your parcel's soil, drainage, and sun data, run the Growable Ground report for your address.
Which states does the California Central Valley cover?
The California Central Valley spans California. Each state's full growing guide is linked below.