Comptche, California, sits in USDA hardiness zone 10a — a range where zone-matched perennials and frost-aware annual timing set what succeeds.
Among the crops suited to this profile: avocado, meyer lemon, tomato, and artichoke. The site-level story — soil, sun, drainage — decides the rest.
Even in Comptche, 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 Comptche 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 Comptche — soil, climate, flood, and parcel records. How we handle your address.
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Comptche — the short answer
Comptche, California: USDA zone 10a, about 304 days between hard freezes, across 739 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
- 739 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 Comptche's average, not your lot's — a low corner or a tree line moves it. Against Comptche's 304-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Comptche
Each reading below is measured for Comptche itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
From county recordsComptche runs about 304 days between hard freezes (read from Mendocino County, the closest normal to Comptche) — 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
MeasuredComptche 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 Comptche is in
Comptche sits in the Coast Range — EPA Level III, inside the wider Marine West Coast Forest. That is read at Comptche'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 Comptche
Plants matched to Comptche'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 Comptche?
Too late for some crops, right on time for others — a growing season is a sequence, not a deadline. 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. And with a calendar this mild, the honest answer is that planting barely stops — winter opens seasons colder regions never see.
What's on the federal record near Comptche
Closest first, within ~10 miles of Comptche. Listing isn't leaking, and distance isn't exposure.
- MENDOCINO SOLID WASTE MANAGEMENT AUTHORITYBrownfields · 2500 ft
- WELLS DENTAL INCBrownfields · 2.3 mi
- CAL FIRE - CHAMBERLAIN CREEK CC-CAL FIRE TECHNICAL SERVICES UNITBrownfields · 5.8 mi
- MRC NAVARROBrownfields · 6.3 mi
- A-1 SEPTIC SERVICEBrownfields · 7.0 mi
- CALTRANS 01-415504Brownfields · 7.7 mi
- CALIFORNIA DEPT OF FORESTRYBrownfields · 8.0 mi
- Navarro General StoreUnderground Storage Tanks · 8.1 mi
- THE WOODSBrownfields · 8.8 mi
- CALIFORNIA STATE PARKS MENDOCINO WOODLANDS SPBrownfields · 8.8 mi
- PACIFIC BELLBrownfields · 8.9 mi
- PAULSON EXCAVATING INCBrownfields · 8.9 mi
3 more sites are on the record inside the same radius. See them on the map
Measured from Comptche'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 Comptche.
Total Sites
17
within ~10 miles of Comptche
Risk Level
Elevated
Highest-severity
1 Superfund site (none NPL-listed)
Severity Distribution
within ~10 miles of Comptche
Highest-Severity Sites
Know Before You Grow
- •Near a brownfield, raised beds of imported soil give your food clean ground.
- •A Superfund listing means federally documented contamination. Test soil and water before planting edibles nearby.
- •Underground tanks leak petroleum as they age — near a former filling station, test the soil.
Check your specific parcel in Comptche
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 Comptche average
Your land is one point inside Comptche
Everything above resolves to Comptche as a whole — one PHZM band, read across 739 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 Comptche Average
Comptche Average
- ●USDA Zones 10a, averaged across Comptche
- ●One soil character for all of Comptche
- ●Frost dates read at Comptche's scale: Feb 5 to Dec 6
YOUR Parcel
- ✓Your exact zone, not Comptche's 10a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Comptche
Pull a site-specific report for your exact address in Comptche, California — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Comptche averages can't show:
We read public map data around Comptche — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Comptche average
How we know this about Comptche
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 Comptche
When does frost risk typically end in Comptche?
The last hard freeze (28°F) in Comptche 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 Comptche?
The first hard freeze (28°F) in Comptche 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 Comptche?
Measured between 28°F hard freezes, Comptche 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 Comptche?
The federal record around Comptche is a meaningful one — 17 documented sites, mostly Brownfields entries (15), 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 Comptche?
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 Comptche's scale — its 10a band and its 304-day season. Your yard writes its own version of Comptche'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 Comptche’s own scale
4 of the readings below were taken at Comptche's own scale — the 739 acres it covers and 17 documented sites around it; 6 are borrowed from a wider read, named and linked below.
Measured here
- Comptche's own USDA hardiness band, zones 10aUSDA PHZM 2023
- 17 documented contamination sites on the federal record near Comptche, the closest Brownfields record about 0.5 miles out from the town centreFederal environmental registers
- Comptche's boundary and the 739 acres inside itUS Census TIGER/Line 2025
- Comptche 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 — Comptche 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 Comptche's 739 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 Comptche's 739 acreswhy one lot differs from the next →
- Which side of Comptche you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 739 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 Comptche-wide figureread your own land →