Santa Ana, California, sits in USDA hardiness zone 10b — enough range to grow cool-season vegetables, hardy fruit, and warm-season crops that mature before the first hard frost.
These conditions suit artichoke, meyer lemon, california poppy, and cabbage — a starting list any specific site will trim or extend with its own soil, sun, and drainage.
Even in Santa Ana, no two yards are alike.
A low spot, a south-facing slope, or a stand of trees moves the frost date and sun across a single Santa Ana lot. Enter your address and we'll score 1,086 plants against your land's actual soil, sun, and frost.
We read public map data around Santa Ana — soil, climate, flood, and parcel records. How we handle your address.
No card required · your full report in seconds
Santa Ana — the short answer
Santa Ana, California: USDA zone 10b, no 28°F killing freeze on record — the season is year-round, across 18K acres of city.
- USDA zone
- 10b
- USDA PHZM 2023
- Killing freeze
- None on record
- NOAA RCC ACIS 1991–2020, this town’s own record
- City area
- 18K acres
- US Census TIGER/Line 2025
Every figure names the dataset it came from. The year-round finding is measured — a 30-year record with no 28°F killing freeze in it — never inferred from missing dates.
Hardiness Zone Range
Zone 10b is Santa Ana's average, not your lot's — a low corner or a tree line moves it. Against Santa Ana's no killing freeze on record, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Santa Ana
Each reading below is measured for Santa Ana itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Winter hardiness
MeasuredSanta Ana sits in USDA hardiness zone 10b.
The zone sets which perennials, shrubs, and fruit trees live through an average winter here — a plant rated for a colder zone is a safe bet, one rated warmer needs winter protection or gets treated as an annual.
Match perennials and fruit to the zone before you buy, so nothing you plant is a gamble against the cold.
USDA PHZM 2023
The kind of country Santa Ana is in
Santa Ana sits in the Southern California/Northern Baja Coast — EPA Level III, inside the wider Mediterranean California. That is read at Santa Ana's own centroid rather than borrowed from Orange County.
What Grows in Santa Ana
Every plant below cleared Santa Ana's own zone 10b. Each card opens that plant's California profile. How we score.
What's on the federal record near Santa Ana
Closest first, within ~10 miles of Santa Ana. Listing isn't leaking, and distance isn't exposure.
- AUTOZONE #5538Brownfields · 1000 ft
- BONAKDAR CHEVRONBrownfields · 1000 ft
- BONAKDARS CHEVRONUnderground Storage Tanks · 1100 ft
- CHEVRON NO 98809Brownfields · 1100 ft
- NORTHGATE MARKET #11Brownfields · 1200 ft
- VERTICAL TRANSPORT- LOWELLBrownfields · 1900 ft
- MARISOL FLORESBrownfields · 0.6 mi
- CAR TUNE COMPLETE AUTO CAREBrownfields · 0.6 mi
- NAVA'S AUTO SERVICEBrownfields · 0.6 mi
- RONNY'S GARAGEBrownfields · 0.6 mi
- JRS CLASSICS LTDBrownfields · 0.6 mi
- FORMER LOS AMIGOS DRY CLEANERSBrownfields · 0.7 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Santa Ana's center, not your beds. Run your own address for what's upwind of you specifically.
Environmental Intelligence
The counts behind that headline — every source type on the record near Santa Ana.
Sources Checked
within ~10 miles of Santa Ana
Severity Distribution
within ~10 miles of Santa Ana
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Santa Ana, Brownfields runs higher than the national average — 12,922 sites within ~10 miles of Santa Ana. It's not cause for alarm — it's worth knowing, and there's a sensible way to grow around it.
Brownfields: Brownfield sites are former commercial or industrial properties where legacy soil contamination (heavy metals, PAHs, petroleum compounds) may persist.
Check EPA brownfield remediation status — many sites have completed cleanup with institutional controls.
Check your specific parcel in Santa Ana
Get exact proximity distances to contamination sources for your specific parcel — plus soil, sun, drainage, and 1,086 plant recommendations.
25+ data sources read at your address, not the Santa Ana average
Your land is one point inside Santa Ana
Everything above resolves to Santa Ana as a whole — one PHZM band and one 28°F frost record, read across 18K acres. Your parcel is one point inside that footprint. Slope, tree cover, a low spot that pools cold air, and what is in the soil are all resolved at the address, and none of them are visible at city scale. That is the honest boundary of this page, and the reason the next step is a reading of your own ground rather than a better local average.
Your Lot vs the Santa Ana Average
Santa Ana Average
- ●USDA Zones 10b, averaged across Santa Ana
- ●One soil character for all of Santa Ana
- ●State-average frost dates
YOUR Parcel
- ✓Your exact zone, not Santa Ana's 10b
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Santa Ana
Pull a site-specific report for your exact address in Santa Ana, California — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Santa Ana averages can't show:
We read public map data around Santa Ana — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Santa Ana average
How we know this about Santa Ana
The datasets: hardiness from the USDA ARS Plant Hardiness Zone Map 2023, read at this city’s own centroid; hard-freeze dates from NOAA 1991–2020 28°F normals, with the labelled statewide window where none resolves; boundaries and acreage from US Census TIGER/Line 2025; the contamination records from the federal sources named in their beats above. Soil is not read at city grain anywhere on this page — there is no city-resolution survey in our data, which is why you will find no soil grid here rather than a statewide one wearing a local label. The resolution ledger below names every figure this page inherited.
Common questions about Santa Ana
Is it too late to plant in Santa Ana?
No — Santa Ana has no 28°F killing freeze in the 30-year station record, so the growing season is year-round and there is no last-frost date to wait for. Planting is paced by rainfall, heat and daylength instead of by frost: start heat-lovers any month, and time cool-season crops (lettuce, brassicas, peas) for the cooler, wetter half of the year or for higher ground. Succession sowing every few weeks works all year, so the limit is what you can keep watered and harvested, not the calendar.
When does frost risk typically end in Santa Ana?
It doesn't — Santa Ana records no 28°F killing freeze at all across the 1991–2020 station record, so there is no spring frost date to plant after. Cold still matters with elevation: the higher you garden, the cooler the nights, and a few tropical crops sulk below about 60°F even where they never freeze.
How long is the growing season in Santa Ana?
Year-round — the 1991–2020 station record for Santa Ana contains no 28°F killing freeze, so there is no season to measure between freezes. What paces planting instead is heat, rainfall and daylength: the hottest, wettest stretch is the hard part for cool-season crops, not winter. Elevation is the one real exception — the higher you garden, the colder the nights get.
Is the soil safe to grow vegetables in Santa Ana?
The federal record around Santa Ana runs heavier than most — 14,927 documented sites, mostly Brownfields entries (12,922), the nearest Brownfields record about 0.2 miles out — 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.
Everything above is measured at Santa Ana's scale — its 10b band and its no killing freeze on record. Your yard writes its own version of Santa Ana's numbers: we read soil, sun, drainage and frost at your exact address. Try it for 14 days — no card required.
What this page reads at Santa Ana’s own scale
6 of the readings below were taken at Santa Ana's own scale — the 17,521 acres it covers and 14,927 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Santa Ana's own USDA hardiness band, zones 10bUSDA PHZM 2023
- No 28°F killing freeze in the 30-year station record covering Santa Ana — a year-round growing seasonNOAA Regional Climate Centers ACIS, 1991-2020
- 14,927 documented contamination sites on the federal record near Santa Ana, the closest Brownfields record about 0.2 miles out from the town centreFederal environmental registers
- Santa Ana's boundary and the 17,521 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear Santa Ana's hardiness zoneGrowable Ground crop-matching engine
- The ecoregion at Santa Ana's own centroid, the Southern California/Northern Baja CoastUS EPA Level III Ecoregions
Inherited from a wider read
- Soil character — no town-scale survey exists, so Santa Ana's 17,521 acres read through its county's SSURGO summaryfrom Orange County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Orange County
- The growing challenges every California grower plans around — written at state scale, so they stay on the state guidefrom California
- Butterfly and beetle records, and the farmland pesticide estimate — all published county-widefrom Orange County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Santa Ana's 17,521 acreswhy one lot differs from the next →
- Which side of Santa Ana you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 17,521 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Brownfields record about 0.2 miles out, measured from the town centrehow we read the record →
- Where cold air settles, which slopes face the sun, and which way the wind runs on your own ground — measured at your address, and averaged away by any Santa Ana-wide figureread your own land →