Mendocino, California, sits in USDA hardiness zone 10a — a range where zone-matched perennials and frost-aware annual timing set what succeeds.
Well-matched crops include avocado, meyer lemon, tomato, and artichoke, and the gap between "grows in the area" and "grows in your yard" is closed by soil, sun, and drainage.
Even in Mendocino, 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 Mendocino 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 Mendocino — soil, climate, flood, and parcel records. How we handle your address.
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Mendocino — the short answer
Mendocino, California: USDA zone 10a, about 304 days between hard freezes, across 1K acres of town.
- USDA zone
- 10a
- USDA PHZM 2023
- Last hard freeze (28°F)
- Feb 5
- Mendocino County normal — NOAA 1991–2020, nearest to this town
- First hard freeze (28°F)
- Dec 6
- Mendocino County normal — NOAA 1991–2020, nearest to this town
- Days between freezes
- ~304
- Mendocino County normal — NOAA 1991–2020, nearest to this town
- Town area
- 1K 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 Mendocino County’s — the closest measured record, labelled as such rather than passed off as local.
Hardiness Zone Range
Zone 10a is Mendocino's average, not your lot's — a low corner or a tree line moves it. Against Mendocino's 304-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Mendocino
Each reading below is measured for Mendocino itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
From county recordsMendocino runs about 304 days between hard freezes (read from Mendocino County, the closest normal to Mendocino) — 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
MeasuredMendocino 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 Mendocino is in
Mendocino sits in the Coast Range — EPA Level III, inside the wider Marine West Coast Forest. That is read at Mendocino's own centroid, and it is not what its county reads: Mendocino County is mostly Klamath Mountains/California High North Coast Range. The wider page above you is answering a different question about different ground.
What Grows in Mendocino
Plants matched to Mendocino's USDA zones 10a, ordered by how much hardiness margin each has here — the ones with room to spare at both ends of this town's band lead. Each links to its full growing profile.
Is it too late to plant in Mendocino?
Usually not — gardeners here simply switch what goes in the ground as the season moves. Cool-season crops can go in from around Jan 8; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Feb 5 (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. 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 Mendocino
Closest first, within ~10 miles of Mendocino. Listing isn't leaking, and distance isn't exposure.
- MUSD/BUS BARNBrownfields · 2500 ft
- AT&T California - TD059Underground Storage Tanks · 2600 ft
- SCHLAFERS AUTO REPAIRBrownfields · 0.5 mi
- PACIFIC BELL C/O ALLEN TD059Brownfields · 0.6 mi
- Schlafer's ChevronUnderground Storage Tanks · 0.6 mi
- MENDOCINO ART CENTERBrownfields · 0.7 mi
- BIG RIVER LTD DESIGNBrownfields · 0.9 mi
- MENDOCINO CITY CSDBrownfields · 0.9 mi
- 017N017W31A001MNitrate · 0.9 mi
- CALIFORNIA STATE PARKS RUSSIAN GULCH SPBrownfields · 1.3 mi
- SOLID WASTE OF WILLITS INC DBA CASPAR TRANSFER STATIONBrownfields · 2.2 mi
- STATHAMS GARAGEBrownfields · 2.2 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Mendocino'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 Mendocino.
Total Sites
129
within ~10 miles of Mendocino
Risk Level
Elevated
Highest-severity
3 Superfund sites (none NPL-listed)
Sources Checked
within ~10 miles of Mendocino
Severity Distribution
within ~10 miles of Mendocino
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Mendocino, two things run higher than the national average within ~10 miles of Mendocino — Superfund (3 sites) and Brownfields (109 sites). Knowing it is half the work — and it's nothing a thoughtful grower can't plan for.
Superfund: Superfund sites represent the most severe contamination in the federal system.
Brownfields: Brownfield sites are former commercial or industrial properties where legacy soil contamination (heavy metals, PAHs, petroleum compounds) may persist.
Commission professional soil testing before any food production (test for heavy metals, VOCs, and SVOCs).
Check EPA brownfield remediation status — many sites have completed cleanup with institutional controls.
Check your specific parcel in Mendocino
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 Mendocino average
Your land is one point inside Mendocino
Everything above resolves to Mendocino as a whole — one PHZM band, read across 1K acres, with hard-freeze dates borrowed from Mendocino 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 Mendocino Average
Mendocino Average
- ●USDA Zones 10a, averaged across Mendocino
- ●One soil character for all of Mendocino
- ●Frost dates read at Mendocino's scale: Feb 5 to Dec 6
YOUR Parcel
- ✓Your exact zone, not Mendocino's 10a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Mendocino
Pull a site-specific report for your exact address in Mendocino, California — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Mendocino averages can't show:
We read public map data around Mendocino — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Mendocino average
How we know this about Mendocino
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 Mendocino 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 Mendocino
When does frost risk typically end in Mendocino?
The last hard freeze (28°F) in Mendocino typically lands around Feb 5, 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 26.
When is the first frost in Mendocino?
The first hard freeze (28°F) in Mendocino 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 304 days after the spring freeze cleared.
How long is the growing season in Mendocino?
Measured between 28°F hard freezes, Mendocino sees about 304 frost-free days — roughly Feb 5 through Dec 6, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Feb 26 to Nov 22, about 269 days.
Is the soil safe to grow vegetables in Mendocino?
The federal record around Mendocino is a meaningful one — 129 documented sites, mostly Brownfields entries (109), the nearest Brownfields record about 0.5 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 Mendocino?
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 Mendocino's scale — its 10a band and its 304-day season. Your yard writes its own version of Mendocino'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 Mendocino’s own scale
4 of the readings below were taken at Mendocino's own scale — the 1,444 acres it covers and 129 documented sites around it; 6 are borrowed from a wider read, named and linked below.
Measured here
- Mendocino's own USDA hardiness band, zones 10aUSDA PHZM 2023
- 129 documented contamination sites on the federal record near Mendocino, the closest Brownfields record about 0.5 miles out from the town centreFederal environmental registers
- Mendocino's boundary and the 1,444 acres inside itUS Census TIGER/Line 2025
- Mendocino sits in the Coast Range — not the ecoregion its county mostly readsUS EPA Level III Ecoregions
Inherited from a wider read
- The 28°F hard-freeze dates — Mendocino has no normal of its own, so its county's is the closest measured readfrom Mendocino County
- Soil character — no town-scale survey exists, so Mendocino's 1,444 acres read through its county's SSURGO summaryfrom Mendocino County
- The candidate plant list — California's curated set, filtered to this zone band and re-ordered by how much margin each has herefrom California
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Mendocino 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 Mendocino County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Mendocino's 1,444 acreswhy one lot differs from the next →
- Which side of Mendocino you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 1,444 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Brownfields record about 0.5 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 Mendocino-wide figureread your own land →