Avenal, California, sits in USDA hardiness zone 9b — enough range to grow cool-season vegetables, hardy fruit, and warm-season crops that mature before the first hard frost.
The conditions favor okra, meyer lemon, california poppy, and artichoke, among others — though every individual site edits that list with its own soil, sun, and drainage.
Even in Avenal, 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 Avenal 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 Avenal — soil, climate, flood, and parcel records. How we handle your address.
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Avenal — the short answer
Avenal, California: USDA zone 9b, about 323 days between hard freezes, across 12K acres of city.
- USDA zone
- 9b
- USDA PHZM 2023
- Last hard freeze (28°F)
- Jan 17
- Kings County normal — NOAA 1991–2020, nearest to this town
- First hard freeze (28°F)
- Dec 6
- Kings County normal — NOAA 1991–2020, nearest to this town
- Days between freezes
- ~323
- Kings 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 Kings County’s — the closest measured record, labelled as such rather than passed off as local.
Hardiness Zone Range
Zone 9b is Avenal's average, not your lot's — a low corner or a tree line moves it. Against Avenal's 323-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Avenal
Each reading below is measured for Avenal itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
From county recordsAvenal runs about 323 days between hard freezes (read from Kings County, the closest normal to Avenal) — 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
MeasuredAvenal 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 Avenal is in
Avenal sits in the Central California Foothills and Coastal Mountains — EPA Level III, inside the wider Mediterranean California. That is read at Avenal's own centroid, and it is not what its county reads: Kings County is mostly Central California Valley. The wider page above you is answering a different question about different ground.
What Grows in Avenal
Every plant below cleared Avenal's own zone 9b and its 323-day season. Each card opens that plant's California profile. How we score.
Is it too late to plant in Avenal?
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 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 Avenal
Closest first, within ~10 miles of Avenal. Listing isn't leaking, and distance isn't exposure.
- O'REILLY AUTO PARTS 6021Brownfields · 1100 ft
- AVENAL LANDFILLBrownfields · 1.3 mi
- AEII LOGISTICS INCBrownfields · 1.5 mi
- CHAYOLI TRUCKINGBrownfields · 1.6 mi
- GOMEZ & SONS TRANSPORT LLCBrownfields · 1.7 mi
- BOBBY C TRUCKINGBrownfields · 1.7 mi
- REEF SUNSET UNIFIED SCHOOL DISTRICTBrownfields · 1.7 mi
- ARJ ChevronUnderground Storage Tanks · 1.7 mi
- Avenal Food MartUnderground Storage Tanks · 1.7 mi
- ORP TRUCKINGBrownfields · 1.7 mi
- CHAPARALL FARMSBrownfields · 1.8 mi
- ZAVALA TRUCKING LLCBrownfields · 1.8 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Avenal'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 Avenal.
Total Sites
216
within ~10 miles of Avenal
Risk Level
Elevated
Highest-severity
1 Toxics Release Inventory facility
Sources Checked
within ~10 miles of Avenal
Severity Distribution
within ~10 miles of Avenal
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Avenal, Nitrate runs higher than the national average — 100 sites within ~10 miles of Avenal. Knowing it is half the work — and it's nothing a thoughtful grower can't plan for.
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 Avenal
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 Avenal average
Your land is one point inside Avenal
Everything above resolves to Avenal as a whole — one PHZM band, read across 12K acres, with hard-freeze dates borrowed from Kings 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 Avenal Average
Avenal Average
- ●USDA Zones 9b, averaged across Avenal
- ●One soil character for all of Avenal
- ●Frost dates read at Avenal's scale: Jan 17 to Dec 6
YOUR Parcel
- ✓Your exact zone, not Avenal's 9b
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Avenal
Pull a site-specific report for your exact address in Avenal, California — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Avenal averages can't show:
We read public map data around Avenal — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Avenal average
How we know this about Avenal
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 Kings 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 Avenal
When does frost risk typically end in Avenal?
The last hard freeze (28°F) in Avenal 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 Avenal?
The first hard freeze (28°F) in Avenal 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 323 days after the spring freeze cleared.
How long is the growing season in Avenal?
Measured between 28°F hard freezes, Avenal sees about 323 frost-free days — roughly Jan 17 through Dec 6, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Feb 7 to Nov 22, about 288 days.
Is the soil safe to grow vegetables in Avenal?
The federal record around Avenal is a meaningful one — 216 documented sites, mostly Nitrate entries (100), the nearest Brownfields record about 0.2 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 Avenal?
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 Avenal's scale — its 9b band and its 323-day season. Your yard writes its own version of Avenal'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 Avenal’s own scale
5 of the readings below were taken at Avenal's own scale — the 12,469 acres it covers and 216 documented sites around it; 5 are borrowed from a wider read, named and linked below.
Measured here
- Avenal's own USDA hardiness band, zones 9bUSDA PHZM 2023
- 216 documented contamination sites on the federal record near Avenal, the closest Brownfields record about 0.2 miles out from the town centreFederal environmental registers
- Avenal's boundary and the 12,469 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 9b and a ~323-day seasonGrowable Ground crop-matching engine
- Avenal sits in the Central California Foothills and Coastal Mountains — not the ecoregion its county mostly readsUS EPA Level III Ecoregions
Inherited from a wider read
- The 28°F hard-freeze dates — Avenal has no normal of its own, so its county's is the closest measured readfrom Kings County
- Soil character — no town-scale survey exists, so Avenal's 12,469 acres read through its county's SSURGO summaryfrom Kings County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Kings 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 Kings County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Avenal's 12,469 acreswhy one lot differs from the next →
- Which side of Avenal you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 12,469 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Brownfields record about 0.2 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 Avenal-wide figureread your own land →