Rancho Calaveras, California, sits in USDA hardiness zone 9b — a zone band wide enough that plant choice, not possibility, is the interesting question.
Growers here do well with okra, meyer lemon, california poppy, and artichoke — with the usual caveat that any single yard's soil, sun, and drainage cast the deciding vote.
Even in Rancho Calaveras, 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 Rancho Calaveras 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 Rancho Calaveras — soil, climate, flood, and parcel records. How we handle your address.
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Rancho Calaveras — the short answer
Rancho Calaveras, California: USDA zone 9b, about 288 days between hard freezes, across 6K acres of town.
- USDA zone
- 9b
- USDA PHZM 2023
- Last hard freeze (28°F)
- Feb 21
- Calaveras County normal — NOAA 1991–2020, nearest to this town
- First hard freeze (28°F)
- Dec 6
- Calaveras County normal — NOAA 1991–2020, nearest to this town
- Days between freezes
- ~288
- Calaveras County normal — NOAA 1991–2020, nearest to this town
- Town area
- 6K 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 Calaveras County’s — the closest measured record, labelled as such rather than passed off as local.
Hardiness Zone Range
Zone 9b is Rancho Calaveras's average, not your lot's — a low corner or a tree line moves it. Against Rancho Calaveras's 288-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Rancho Calaveras
Each reading below is measured for Rancho Calaveras itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
From county recordsRancho Calaveras runs about 288 days between hard freezes (read from Calaveras County, the closest normal to Rancho Calaveras) — 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
MeasuredRancho Calaveras 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 Rancho Calaveras is in
Rancho Calaveras sits in the Central California Foothills and Coastal Mountains — EPA Level III, inside the wider Mediterranean California. That is read at Rancho Calaveras's own centroid rather than borrowed from Calaveras County.
What Grows in Rancho Calaveras
Every plant below cleared Rancho Calaveras's own zone 9b and its 288-day season. Each card opens that plant's California profile. How we score.
Is it too late to plant in Rancho Calaveras?
Almost never — the real question is what to plant next. Cool-season crops can go in from around Jan 24; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Feb 21 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Dec 6 — 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.
What's on the federal record near Rancho Calaveras
Closest first, within ~10 miles of Rancho Calaveras. Listing isn't leaking, and distance isn't exposure.
- SUAVEY J TRANSPORTATION INCBrownfields · 1.2 mi
- CCWD - JENNY LINDPFAS · 2.0 mi
- FOOTHILL MATERIALS INCBrownfields · 2.2 mi
- LA CONTENTA ONE HOUR PHOTOBrownfields · 2.7 mi
- VILLAGE GAS N MART INC DBA VILLAGE GAS N MARTBrownfields · 2.7 mi
- Plymouth RockMining · 2.7 mi
- Village Gas N MartUnderground Storage Tanks · 2.7 mi
- NEW HOGAN POWER PLANTBrownfields · 3.0 mi
- 003N010E20D001MNitrate · 3.1 mi
- LALLO'S AUTOMOTIVEBrownfields · 3.3 mi
- PACIFIC BELLBrownfields · 3.6 mi
- BLUE BIRD AUTO SALVAGEBrownfields · 3.7 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Rancho Calaveras'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 Rancho Calaveras.
Total Sites
155
within ~10 miles of Rancho Calaveras
Risk Level
Elevated
Highest-severity
1 Superfund site (none NPL-listed)
Sources Checked
within ~10 miles of Rancho Calaveras
Severity Distribution
within ~10 miles of Rancho Calaveras
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Rancho Calaveras, Mining runs higher than the national average — 65 sites within ~10 miles of Rancho Calaveras. Knowing it is half the work — and it's nothing a thoughtful grower can't plan for.
Mining: Mining sites — both historic and active — can leach heavy metals (arsenic, lead, cadmium, mercury) into soil and water for centuries after operations cease.
Test soil for heavy metals (lead, arsenic, cadmium, mercury) — this is essential near any mining site.
Check your specific parcel in Rancho Calaveras
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 Rancho Calaveras average
Your land is one point inside Rancho Calaveras
Everything above resolves to Rancho Calaveras as a whole — one PHZM band, read across 6K acres, with hard-freeze dates borrowed from Calaveras 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 Rancho Calaveras Average
Rancho Calaveras Average
- ●USDA Zones 9b, averaged across Rancho Calaveras
- ●One soil character for all of Rancho Calaveras
- ●Frost dates read at Rancho Calaveras's scale: Feb 21 to Dec 6
YOUR Parcel
- ✓Your exact zone, not Rancho Calaveras's 9b
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Rancho Calaveras
Pull a site-specific report for your exact address in Rancho Calaveras, California — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Rancho Calaveras averages can't show:
We read public map data around Rancho Calaveras — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Rancho Calaveras average
How we know this about Rancho Calaveras
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 Calaveras 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 Rancho Calaveras
When does frost risk typically end in Rancho Calaveras?
The last hard freeze (28°F) in Rancho Calaveras typically lands around Feb 21, 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 Mar 14.
When is the first frost in Rancho Calaveras?
The first hard freeze (28°F) in Rancho Calaveras typically arrives around Dec 6, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Nov 22, so the watching starts about Nov 6 — about 288 days after the spring freeze cleared.
How long is the growing season in Rancho Calaveras?
Measured between 28°F hard freezes, Rancho Calaveras sees about 288 frost-free days — roughly Feb 21 through Dec 6, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Mar 14 to Nov 22, about 253 days.
Is the soil safe to grow vegetables in Rancho Calaveras?
The federal record around Rancho Calaveras is a meaningful one — 155 documented sites, mostly Mining entries (65), the nearest Brownfields record about 1.2 miles out — so a soil test before new food beds is a sensible precaution here, not a reason to hold back from growing. Remember that proximity to a documented site is information, not a diagnosis of any one yard; the contamination map shows exactly what sits where.
How do I protect my plants from frost in Rancho Calaveras?
From about Nov 6 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 6 (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 6. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Rancho Calaveras's scale — its 9b band and its 288-day season. Your yard writes its own version of Rancho Calaveras'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 Rancho Calaveras’s own scale
5 of the readings below were taken at Rancho Calaveras's own scale — the 6,386 acres it covers and 155 documented sites around it; 5 are borrowed from a wider read, named and linked below.
Measured here
- Rancho Calaveras's own USDA hardiness band, zones 9bUSDA PHZM 2023
- 155 documented contamination sites on the federal record near Rancho Calaveras, the closest Brownfields record about 1.2 miles out from the town centreFederal environmental registers
- Rancho Calaveras's boundary and the 6,386 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 9b and a ~288-day seasonGrowable Ground crop-matching engine
- The ecoregion at Rancho Calaveras's own centroid, the Central California Foothills and Coastal MountainsUS EPA Level III Ecoregions
Inherited from a wider read
- The 28°F hard-freeze dates — Rancho Calaveras has no normal of its own, so its county's is the closest measured readfrom Calaveras County
- Soil character — no town-scale survey exists, so Rancho Calaveras's 6,386 acres read through its county's SSURGO summaryfrom Calaveras County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Calaveras 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 Calaveras County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Rancho Calaveras's 6,386 acreswhy one lot differs from the next →
- Which side of Rancho Calaveras you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 6,386 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Brownfields record about 1.2 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 Rancho Calaveras-wide figureread your own land →