Borrego Springs, California, sits in USDA hardiness zone 10a — a band that supports both cool-season staples and warm-season crops chosen to fit the local frost window.
Reliable performers under these conditions include okra, meyer lemon, california poppy, and artichoke; what your own ground favors still comes down to its soil, sun, and drainage.
Even in Borrego Springs, 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 Borrego Springs 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 Borrego Springs — soil, climate, flood, and parcel records. How we handle your address.
No card required · your full report in seconds
Borrego Springs — the short answer
Borrego Springs, California: USDA zone 10a, about 311 days between hard freezes, across 28K acres of town.
- USDA zone
- 10a
- USDA PHZM 2023
- Last hard freeze (28°F)
- Feb 3
- San Diego County normal — NOAA 1991–2020, nearest to this town
- First hard freeze (28°F)
- Dec 11
- San Diego County normal — NOAA 1991–2020, nearest to this town
- Days between freezes
- ~311
- San Diego County normal — NOAA 1991–2020, nearest to this town
- Town area
- 28K 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 San Diego County’s — the closest measured record, labelled as such rather than passed off as local.
Hardiness Zone Range
Zone 10a is Borrego Springs's average, not your lot's — a low corner or a tree line moves it. Against Borrego Springs's 311-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Borrego Springs
Each reading below is measured for Borrego Springs itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
From county recordsBorrego Springs runs about 311 days between hard freezes (read from San Diego County, the closest normal to Borrego Springs) — 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
MeasuredBorrego Springs sits in USDA hardiness zone 10a.
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 Borrego Springs is in
Borrego Springs sits in the Sonoran Basin and Range — EPA Level III, inside the wider North American Deserts. That is read at Borrego Springs's own centroid, and it is not what its county reads: San Diego County is mostly Southern California/Northern Baja Coast. The wider page above you is answering a different question about different ground.
What Grows in Borrego Springs
Every plant below cleared Borrego Springs's own zone 10a and its 311-day season. Each card opens that plant's California profile. How we score.
Is it too late to plant in Borrego Springs?
Rarely: the season closes in stages, not all at once, and each stage has its crops. Cool-season crops can go in from around Jan 6; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Feb 3 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Dec 11 — 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.
What's on the federal record near Borrego Springs
Closest first, within ~10 miles of Borrego Springs. Listing isn't leaking, and distance isn't exposure.
- BORREGO SPRINGS GOLF RESORT & SPABrownfields · 400 ft
- TITO'S AUTO CAREBrownfields · 1.1 mi
- THE ROADRUNNER CLUB AT BORREGO LPBrownfields · 1.1 mi
- 011S006E16A002SNitrate · 1.1 mi
- 011S006E03D003SNitrate · 1.2 mi
- J & T TIRE AND AUTOBrownfields · 1.2 mi
- SD CNTY BORREGO SPRINGS RD STATIONUnderground Storage Tanks · 1.3 mi
- BORREGO WATER DISTRICTBrownfields · 1.4 mi
- MIRAGE GAS COMPANY INC (DBA SUN COAST AUTO REPAIR)Underground Storage Tanks · 1.4 mi
- SUN COAST AUTO INCBrownfields · 1.4 mi
- 011S006E11D001SNitrate · 1.6 mi
- AT&T MOBILITY BORREGO SPRINGS 2317Brownfields · 1.6 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Borrego Springs'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 Borrego Springs.
Total Sites
60
within ~10 miles of Borrego Springs
Risk Level
Moderate
Highest-severity
25 brownfield sites
Sources Checked
within ~10 miles of Borrego Springs
Severity Distribution
within ~10 miles of Borrego Springs
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Borrego Springs, Nitrate runs higher than the national average — 32 sites within ~10 miles of Borrego Springs. That's not a problem with your land — it's information about it.
Nitrate: Nitrate contamination primarily comes from agricultural fertilizer runoff and failing septic systems.
Test well water for nitrate if you rely on a private well for irrigation (EPA standard: 10 mg/L).
Check your specific parcel in Borrego Springs
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 Borrego Springs average
Your land is one point inside Borrego Springs
Everything above resolves to Borrego Springs as a whole — one PHZM band, read across 28K acres, with hard-freeze dates borrowed from San Diego County’s record because no 30-year normal resolves at this town’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 town 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 Borrego Springs Average
Borrego Springs Average
- ●USDA Zones 10a, averaged across Borrego Springs
- ●One soil character for all of Borrego Springs
- ●Frost dates read at Borrego Springs's scale: Feb 3 to Dec 11
YOUR Parcel
- ✓Your exact zone, not Borrego Springs's 10a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Borrego Springs
Pull a site-specific report for your exact address in Borrego Springs, California — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Borrego Springs averages can't show:
We read public map data around Borrego Springs — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Borrego Springs average
How we know this about Borrego Springs
The datasets: hardiness from the USDA ARS Plant Hardiness Zone Map 2023, read at this town’s own centroid; hard-freeze dates from NOAA 1991–2020 28°F normals at San Diego 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 town grain anywhere on this page — there is no town-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 Borrego Springs
When does frost risk typically end in Borrego Springs?
The last hard freeze (28°F) in Borrego Springs typically lands around Feb 3, 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 24.
When is the first frost in Borrego Springs?
The first hard freeze (28°F) in Borrego Springs typically arrives around Dec 11, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Nov 27, so the watching starts about Nov 11 — about 311 days after the spring freeze cleared.
How long is the growing season in Borrego Springs?
Measured between 28°F hard freezes, Borrego Springs sees about 311 frost-free days — roughly Feb 3 through Dec 11, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Feb 24 to Nov 27, about 276 days.
Is the soil safe to grow vegetables in Borrego Springs?
The federal record around Borrego Springs shows 60 documented sites, mostly Nitrate entries (32), the nearest Brownfields record under a tenth of a mile out — a typical footprint for a growing area, and proximity to a documented site is information, not a diagnosis of any one yard. It's worth seeing which recorded sites sit closest to where you grow, and testing the soil before new food beds near any of them.
How do I protect my plants from frost in Borrego Springs?
From about Nov 11 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 11 (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 11. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Borrego Springs's scale — its 10a band and its 311-day season. Your yard writes its own version of Borrego Springs'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 Borrego Springs’s own scale
5 of the readings below were taken at Borrego Springs's own scale — the 27,780 acres it covers and 60 documented sites around it; 5 are borrowed from a wider read, named and linked below.
Measured here
- Borrego Springs's own USDA hardiness band, zones 10aUSDA PHZM 2023
- 60 documented contamination sites on the federal record near Borrego Springs, the closest Brownfields record under a tenth of a mile out from the town centreFederal environmental registers
- Borrego Springs's boundary and the 27,780 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 10a and a ~311-day seasonGrowable Ground crop-matching engine
- Borrego Springs sits in the Sonoran Basin and Range — not the ecoregion its county mostly readsUS EPA Level III Ecoregions
Inherited from a wider read
- The 28°F hard-freeze dates — Borrego Springs has no normal of its own, so its county's is the closest measured readfrom San Diego County
- Soil character — no town-scale survey exists, so Borrego Springs's 27,780 acres read through its county's SSURGO summaryfrom San Diego County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom San Diego 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 San Diego County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Borrego Springs's 27,780 acreswhy one lot differs from the next →
- Which side of Borrego Springs you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 27,780 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 Borrego Springs-wide figureread your own land →
More in California
Nearby growing guides