Santa Clara, California, sits in USDA hardiness zone 9b — a range where zone-matched perennials and frost-aware annual timing set what succeeds.
A short list that earns its place here — okra, meyer lemon, california poppy, and artichoke — with any one site's soil, sun, and drainage making the final cut.
Even in Santa Clara, 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 Clara 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 Clara — soil, climate, flood, and parcel records. How we handle your address.
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Santa Clara — the short answer
Santa Clara, California: USDA zone 9b, about 331 days between hard freezes, across 12K acres of city.
- USDA zone
- 9b
- USDA PHZM 2023
- Last hard freeze (28°F)
- Jan 17
- Santa Clara County normal — NOAA 1991–2020, nearest to this town
- First hard freeze (28°F)
- Dec 14
- Santa Clara County normal — NOAA 1991–2020, nearest to this town
- Days between freezes
- ~331
- Santa Clara County normal — NOAA 1991–2020, nearest to this town
- City area
- 12K acres
- US Census TIGER/Line 2025
Every figure names the dataset it came from. No 30-year normal resolves at this town’s own centroid, so the hard-freeze dates are Santa Clara County’s — the closest measured record, labelled as such rather than passed off as local.
Hardiness Zone Range
Zone 9b is Santa Clara's average, not your lot's — a low corner or a tree line moves it. Against Santa Clara's 331-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Santa Clara
Each reading below is measured for Santa Clara itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
From county recordsSanta Clara runs about 331 days between hard freezes (read from Santa Clara County, the closest normal to Santa Clara) — close to year-round growing.
Frost is rarely the limit here; winter plantings are as real as summer ones, and the harder question is which crops shrug off the summer heat.
Grow cool-season crops through the mild winter, and choose heat-tolerant varieties for the summer beds.
NOAA 1991–2020 Climate Normals
Winter hardiness
MeasuredSanta Clara sits in USDA hardiness zone 9b.
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 Clara is in
Santa Clara sits in the Central California Foothills and Coastal Mountains — EPA Level III, inside the wider Mediterranean California. That is read at Santa Clara's own centroid rather than borrowed from Santa Clara County.
What Grows in Santa Clara
Every plant below cleared Santa Clara's own zone 9b and its 331-day season. Each card opens that plant's California profile. How we score.
Is it too late to plant in Santa Clara?
Usually not — gardeners here simply switch what goes in the ground as the season moves. Cool-season crops can go in from around Jan 1; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Jan 17 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Dec 14 — long-season crops need about 90 days of runway, quick greens only 30. In a climate this gentle, “too late” hardly applies — the question becomes which crops prefer the cooler months ahead.
Documented around Santa Clara
Spotted lanternfly documented 30 miles from Santa Clara, first recorded 2023. What to watch for.
What's on the federal record near Santa Clara
Closest first, within ~10 miles of Santa Clara. Listing isn't leaking, and distance isn't exposure.
- RACHIT AGGARWALBrownfields · 450 ft
- DEEPA MANOJBrownfields · 1200 ft
- LITTON ELECTRON DEVICESBrownfields · 1300 ft
- APPLE INC. (MARTIN 1)Brownfields · 1500 ft
- APRIL MCKIEBrownfields · 1500 ft
- PACIFIC JANITORIAL SUPPLY COBrownfields · 1600 ft
- DATA POINT CORPBrownfields · 1600 ft
- REDWOOD TRAILS LLCBrownfields · 1700 ft
- KEN SCHMIDTBrownfields · 1700 ft
- FISHER SCIENTIFIC BRANCH 17Brownfields · 1700 ft
- SPECTRA INCToxics Release Inventory · 1700 ft
- SPECTRA INCBrownfields · 1700 ft
6 more sites are on the record inside the same radius. See them on the map
Measured from Santa Clara'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 Clara.
Sources Checked
within ~10 miles of Santa Clara
Severity Distribution
within ~10 miles of Santa Clara
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Santa Clara, Brownfields runs higher than the national average — 9,650 sites within ~10 miles of Santa Clara. Knowing it is half the work — and it's nothing a thoughtful grower can't plan for.
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 Clara
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 Clara average
Your land is one point inside Santa Clara
Everything above resolves to Santa Clara as a whole — one PHZM band, read across 12K acres, with hard-freeze dates borrowed from Santa Clara County’s record because no 30-year normal resolves at this city’s own centroid. 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 Clara Average
Santa Clara Average
- ●USDA Zones 9b, averaged across Santa Clara
- ●One soil character for all of Santa Clara
- ●Frost dates read at Santa Clara's scale: Jan 17 to Dec 14
YOUR Parcel
- ✓Your exact zone, not Santa Clara's 9b
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Santa Clara
Pull a site-specific report for your exact address in Santa Clara, California — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Santa Clara averages can't show:
We read public map data around Santa Clara — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Santa Clara average
How we know this about Santa Clara
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 at Santa Clara County’s record, because none resolves here; 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 Clara
When does frost risk typically end in Santa Clara?
The last hard freeze (28°F) in Santa Clara typically lands around Jan 17, per NOAA 1991–2020 climate normals — earlier than the light-frost dates most charts quote. 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 7.
When is the first frost in Santa Clara?
The first hard freeze (28°F) in Santa Clara typically arrives around Dec 14, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Nov 30, so the watching starts about Nov 14 — about 331 days after the spring freeze cleared.
How long is the growing season in Santa Clara?
Measured between 28°F hard freezes, Santa Clara sees about 331 frost-free days — roughly Jan 17 through Dec 14, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Feb 7 to Nov 30, about 296 days.
Is the soil safe to grow vegetables in Santa Clara?
The federal record around Santa Clara runs heavier than most — 10,767 documented sites, mostly Brownfields entries (9,650), the nearest Brownfields record under a tenth of a mile 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.
How do I protect my plants from frost in Santa Clara?
From about Nov 14 the job here turns from planting to protecting — the last start even a 30-day crop can finish. As the season closes around the first 28°F hard freeze near Dec 14 (NOAA 1991–2020 climate normals), three moves buy time: row cover or an old sheet over tender plants on still, clear nights; water the soil the afternoon before a freeze, so it holds warmth overnight; and harvest tomatoes, peppers and basil before Dec 14. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Santa Clara's scale — its 9b band and its 331-day season. Your yard writes its own version of Santa Clara'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 Clara’s own scale
6 of the readings below were taken at Santa Clara's own scale — the 11,697 acres it covers and 10,767 documented sites around it; 5 are borrowed from a wider read, named and linked below.
Measured here
- Santa Clara's own USDA hardiness band, zones 9bUSDA PHZM 2023
- 10,767 documented contamination sites on the federal record near Santa Clara, the closest Brownfields record under a tenth of a mile out from the town centreFederal environmental registers
- Santa Clara's boundary and the 11,697 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 9b and a ~331-day seasonGrowable Ground crop-matching engine
- The ecoregion at Santa Clara's own centroid, the Central California Foothills and Coastal MountainsUS EPA Level III Ecoregions
- A documented spotted-lanternfly record within reach of Santa Claralydemapr (De Bona & Helmus), 10 km survey lattice
Inherited from a wider read
- The 28°F hard-freeze dates — Santa Clara has no normal of its own, so its county's is the closest measured readfrom Santa Clara County
- Soil character — no town-scale survey exists, so Santa Clara's 11,697 acres read through its county's SSURGO summaryfrom Santa Clara County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Santa Clara 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 Santa Clara County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Santa Clara's 11,697 acreswhy one lot differs from the next →
- Which side of Santa Clara you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 11,697 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Brownfields record under a tenth of a mile 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 Clara-wide figureread your own land →
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