Wilsonia, California, sits in USDA hardiness zone 7b — a range where zone-matched perennials and frost-aware annual timing set what succeeds.
Reliable performers under these conditions include cabbage, fig, california poppy, and collard greens; what your own ground favors still comes down to its soil, sun, and drainage.
Even in Wilsonia, 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 Wilsonia 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 Wilsonia — soil, climate, flood, and parcel records. How we handle your address.
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Wilsonia — the short answer
Wilsonia, California: USDA zone 7b, about 175 days between hard freezes, across 175 acres of town.
- USDA zone
- 7b
- USDA PHZM 2023
- Last hard freeze (28°F)
- May 8
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Oct 30
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~175
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Town area
- 175 acres
- US Census TIGER/Line 2025
Every figure names the dataset it came from. Hard-freeze dates are this town’s own 28°F normals: light frosts run a few weeks past them, and tender transplants usually wait 2–3 weeks after the last hard freeze.
Hardiness Zone Range
Zone 7b is Wilsonia's average, not your lot's — a low corner or a tree line moves it. Against Wilsonia's 175-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Wilsonia
Each reading below is measured for Wilsonia itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredWilsonia runs about 175 days between hard freezes — a moderate growing season.
There is room for the full run of cool-season crops plus a warm-season main crop, but the calendar is tight enough that a late spring or early fall frost still decides how much finishes.
Time warm-season transplants to your last hard freeze, and a few weeks of season extension turns a near-miss harvest into a sure one.
NOAA 1991–2020 Climate Normals
Winter hardiness
MeasuredWilsonia sits in USDA hardiness zone 7b.
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 Wilsonia is in
Wilsonia sits in the Sierra Nevada — EPA Level III, inside the wider Northwestern Forested Mountains. That is read at Wilsonia's own centroid rather than borrowed from Tulare County.
What Grows in Wilsonia
Every plant below cleared Wilsonia's own zone 7b and its 175-day season. Each card opens that plant's California profile. How we score.
Is it too late to plant in Wilsonia?
For most of the year, no — what changes is which crops still fit the days remaining. Cool-season crops can go in from around Apr 10; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near May 8 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Oct 30 — long-season crops need about 90 days of runway, quick greens only 30. Even past midsummer there is room for a true fall garden here, and garlic planted near the close carries the momentum into next year.
What's on the federal record near Wilsonia
Closest first, within ~10 miles of Wilsonia. Listing isn't leaking, and distance isn't exposure.
- SEQUOIA LAKE CONFERENCE OF YMCABrownfields · 2.6 mi
- Black PrinceMining · 3.3 mi
- Gray EagleMining · 3.3 mi
- DomingoMining · 3.3 mi
- 014S027E14Q001MNitrate · 3.8 mi
- HUME LAKE CHRISTIAN CAMPSUnderground Storage Tanks · 4.0 mi
- USDA USFS R05 , PINEHURST WORK CTRBrownfields · 4.2 mi
- CALTRANS D6 MAINTENANCE PINEHURST MSBrownfields · 4.4 mi
- HUME LAKE CHARTERBrownfields · 5.6 mi
- HARTLAND CHRISTIAN ASSOCIATIONBrownfields · 5.7 mi
- Hart GroupMining · 6.0 mi
- KirklandMining · 6.1 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Wilsonia'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 Wilsonia.
Sources Checked
within ~10 miles of Wilsonia
Severity Distribution
within ~10 miles of Wilsonia
Highest-Severity Sites
Know Before You Grow
- •Mine waste leaches heavy metals. Test for lead, arsenic and cadmium before growing food here.
- •Near a brownfield, raised beds of imported soil give your food clean ground.
- •On a private well, test for nitrates: above 10 mg/L the water needs treatment before irrigating.
Check your specific parcel in Wilsonia
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 Wilsonia average
Your land is one point inside Wilsonia
Everything above resolves to Wilsonia as a whole — one PHZM band and one 28°F frost record, read across 175 acres. 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 Wilsonia Average
Wilsonia Average
- ●USDA Zones 7b, averaged across Wilsonia
- ●One soil character for all of Wilsonia
- ●Frost dates read at Wilsonia's scale: May 8 to Oct 30
YOUR Parcel
- ✓Your exact zone, not Wilsonia's 7b
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Wilsonia
Pull a site-specific report for your exact address in Wilsonia, California — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Wilsonia averages can't show:
We read public map data around Wilsonia — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Wilsonia average
How we know this about Wilsonia
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 Wilsonia’s own record; 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 Wilsonia
When does frost risk typically end in Wilsonia?
The last hard freeze (28°F) in Wilsonia typically lands around May 8, 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 May 29.
When is the first frost in Wilsonia?
The first hard freeze (28°F) in Wilsonia typically arrives around Oct 30, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Oct 16, so the watching starts about Sep 30 — about 175 days after the spring freeze cleared.
How long is the growing season in Wilsonia?
Measured between 28°F hard freezes, Wilsonia sees about 175 frost-free days — roughly May 8 through Oct 30, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer May 29 to Oct 16, about 140 days.
Is the soil safe to grow vegetables in Wilsonia?
The federal record around Wilsonia is light — 24 documented sites across the 9 federal source types we checked, mostly Mining entries (10), the nearest Brownfields record about 2.6 miles out — and proximity to a documented site is information, not a diagnosis of any one yard. Growing food here starts from a strong position; a soil test before new food beds settles any site-specific question.
How do I protect my plants from frost in Wilsonia?
From about Sep 30 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 Oct 30 (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 Oct 30. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Wilsonia's scale — its 7b band and its 175-day season. Your yard writes its own version of Wilsonia'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 Wilsonia’s own scale
6 of the readings below were taken at Wilsonia's own scale — its own ~175-day season between 28°F freezes, the 175 acres it covers and 24 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Wilsonia's own USDA hardiness band, zones 7bUSDA PHZM 2023
- Wilsonia's own 28°F hard-freeze dates, about May 8 and Oct 30 and the ~175-day span between themNOAA 1991–2020 Climate Normals
- 24 documented contamination sites on the federal record near Wilsonia, the closest Brownfields record about 2.6 miles out from the town centreFederal environmental registers
- Wilsonia's boundary and the 175 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 7b and a ~175-day seasonGrowable Ground crop-matching engine
- The ecoregion at Wilsonia's own centroid, the Sierra NevadaUS EPA Level III Ecoregions
Inherited from a wider read
- Soil character — no town-scale survey exists, so Wilsonia's 175 acres read through its county's SSURGO summaryfrom Tulare County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Tulare 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 Tulare County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Wilsonia's 175 acreswhy one lot differs from the next →
- Which side of Wilsonia you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 175 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Brownfields record about 2.6 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 Wilsonia-wide figureread your own land →
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