Westside, California, sits in USDA hardiness zone 9a — a band that supports both cool-season staples and warm-season crops chosen to fit the local frost window.
Crops well matched to these conditions include tomato, artichoke, fig, and california poppy — though what thrives on any one site still turns on its specific soil, sun, and drainage.
Even in Westside, 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 Westside 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 Westside — soil, climate, flood, and parcel records. How we handle your address.
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Westside — the short answer
Westside, California: USDA zone 9a, about 329 days between hard freezes, across 1K acres of town.
- USDA zone
- 9a
- USDA PHZM 2023
- Last hard freeze (28°F)
- Jan 16
- Fresno County normal — NOAA 1991–2020, nearest to this town
- First hard freeze (28°F)
- Dec 11
- Fresno County normal — NOAA 1991–2020, nearest to this town
- Days between freezes
- ~329
- Fresno 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 Fresno County’s — the closest measured record, labelled as such rather than passed off as local.
Hardiness Zone Range
Zone 9a is Westside's average, not your lot's — a low corner or a tree line moves it. Against Westside's 329-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Westside
Each reading below is measured for Westside itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
From county recordsWestside runs about 329 days between hard freezes (read from Fresno County, the closest normal to Westside) — 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
MeasuredWestside sits in USDA hardiness zone 9a.
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 Westside is in
Westside sits in the Central California Valley — EPA Level III, inside the wider Mediterranean California. That is read at Westside's own centroid rather than borrowed from Fresno County.
What Grows in Westside
Plants matched to Westside's USDA zones 9a, 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 Westside?
For most of the year, no — what changes is which crops still fit the days remaining. 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 16 (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 Westside
Closest first, within ~10 miles of Westside. Listing isn't leaking, and distance isn't exposure.
- 017S017E33N001MNitrate · 1000 ft
- 5 STAR MARKETUnderground Storage Tanks · 2500 ft
- 017S017E28R005MNitrate · 1.0 mi
- BRITZ FERTILIZERS INC.Brownfields · 1.0 mi
- BRITZ-SIMPLOT GROWER SOLUTIONS, FIVE POINTSBrownfields · 1.1 mi
- TRCC INCBrownfields · 1.2 mi
- 017S017E31R001MNitrate · 1.3 mi
- WESTSIDE SOLAR LLCBrownfields · 1.4 mi
- 017S017E35N001MNitrate · 1.8 mi
- 017S017E31Q002MNitrate · 1.8 mi
- 017S017E27R004MNitrate · 1.8 mi
- CROP PRODUCTION SERVICES - FIVE POINTSBrownfields · 1.9 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Westside'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 Westside.
Total Sites
303
within ~10 miles of Westside
Risk Level
Elevated
Highest-severity
2 Toxics Release Inventory facilities
Sources Checked
within ~10 miles of Westside
Severity Distribution
within ~10 miles of Westside
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Westside, Nitrate runs higher than the national average — 246 sites within ~10 miles of Westside. It's not cause for alarm — it's worth knowing, and there's a sensible way to grow around 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 Westside
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 Westside average
Your land is one point inside Westside
Everything above resolves to Westside as a whole — one PHZM band, read across 1K acres, with hard-freeze dates borrowed from Fresno 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 Westside Average
Westside Average
- ●USDA Zones 9a, averaged across Westside
- ●One soil character for all of Westside
- ●Frost dates read at Westside's scale: Jan 16 to Dec 11
YOUR Parcel
- ✓Your exact zone, not Westside's 9a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Westside
Pull a site-specific report for your exact address in Westside, California — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Westside averages can't show:
We read public map data around Westside — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Westside average
How we know this about Westside
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 Fresno 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 Westside
When does frost risk typically end in Westside?
The last hard freeze (28°F) in Westside typically lands around Jan 16, 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 6.
When is the first frost in Westside?
The first hard freeze (28°F) in Westside 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 329 days after the spring freeze cleared.
How long is the growing season in Westside?
Measured between 28°F hard freezes, Westside sees about 329 frost-free days — roughly Jan 16 through Dec 11, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Feb 6 to Nov 27, about 294 days.
Is the soil safe to grow vegetables in Westside?
The federal record around Westside is a meaningful one — 303 documented sites, mostly Nitrate entries (246), the nearest Nitrate 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 Westside?
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 Westside's scale — its 9a band and its 329-day season. Your yard writes its own version of Westside'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 Westside’s own scale
4 of the readings below were taken at Westside's own scale — the 1,419 acres it covers and 303 documented sites around it; 6 are borrowed from a wider read, named and linked below.
Measured here
- Westside's own USDA hardiness band, zones 9aUSDA PHZM 2023
- 303 documented contamination sites on the federal record near Westside, the closest Nitrate record about 0.2 miles out from the town centreFederal environmental registers
- Westside's boundary and the 1,419 acres inside itUS Census TIGER/Line 2025
- The ecoregion at Westside's own centroid, the Central California ValleyUS EPA Level III Ecoregions
Inherited from a wider read
- The 28°F hard-freeze dates — Westside has no normal of its own, so its county's is the closest measured readfrom Fresno County
- Soil character — no town-scale survey exists, so Westside's 1,419 acres read through its county's SSURGO summaryfrom Fresno 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 Fresno 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 Fresno County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Westside's 1,419 acreswhy one lot differs from the next →
- Which side of Westside you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 1,419 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Nitrate 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 Westside-wide figureread your own land →