Hart, Texas, sits in USDA hardiness zone 7a — a range where zone-matched perennials and frost-aware annual timing set what succeeds.
Among the crops suited to this profile: cabbage, hazelnut, california poppy, and collard greens. The site-level story — soil, sun, drainage — decides the rest.
Even in Hart, 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 Hart 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 Hart — soil, climate, flood, and parcel records. How we handle your address.
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Hart — the short answer
Hart, Texas: USDA zone 7a, about 211 days between hard freezes, across 472 acres of city.
- USDA zone
- 7a
- USDA PHZM 2023
- Last hard freeze (28°F)
- Apr 4
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Nov 1
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~211
- NOAA 1991–2020 Climate Normals, 28°F — this town
- City area
- 472 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 7a is Hart's average, not your lot's — a low corner or a tree line moves it. Against Hart's 211-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Hart
Each reading below is measured for Hart itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredHart runs about 211 days between hard freezes — a long growing season.
There is slack for succession plantings and slow-finishing crops: many vegetables can be sown twice, and the heat-lovers have time to ripen fully.
Plan a second sowing of quick crops after the first comes out, and use the fall window most gardeners let sit idle.
NOAA 1991–2020 Climate Normals
Winter hardiness
MeasuredHart sits in USDA hardiness zone 7a.
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 Hart is in
Hart sits in the High Plains — EPA Level III, inside the wider Great Plains. That is read at Hart's own centroid rather than borrowed from Castro County.
What Grows in Hart
Every plant below cleared Hart's own zone 7a and its 211-day season. Each card opens that plant's Texas profile. How we score.
Is it too late to plant in Hart?
Almost never — the real question is what to plant next. Cool-season crops can go in from around Mar 7; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Apr 4 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Nov 1 — long-season crops need about 90 days of runway, quick greens only 30. There is slack in a calendar like this — late plantings, second rounds of favorites, and a fall bench that keeps beds working.
What's on the federal record near Hart
Closest first, within ~10 miles of Hart. Listing isn't leaking, and distance isn't exposure.
- HART SCHOOLUnderground Storage Tanks · 1700 ft
- WEST TEXAS GASUnderground Storage Tanks · 0.6 mi
- MIDWAY HEIFER YARDSCAFO · 1.1 mi
- VANDERHAM DAIRY IICAFO · 3.0 mi
- CBJ FARMS 3CAFO · 3.0 mi
- SPANDET HEIFER YARDCAFO · 3.9 mi
- HART OF TEXAS CATTLE FEEDERSCAFO · 3.9 mi
- JD MYRICK FEEDYARDCAFO · 4.2 mi
- SPANDET DAIRY 2CAFO · 5.3 mi
- BLACK CATTLECAFO · 5.4 mi
- TRIANGLE CATTLECAFO · 5.4 mi
- TRIANGLE CATTLE COMPANYCAFO · 5.5 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Hart'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 Hart.
Total Sites
25
within ~10 miles of Hart
Risk Level
Low
Highest-severity
22 concentrated animal feeding operations
Severity Distribution
within ~10 miles of Hart
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Hart, CAFO runs higher than the national average — 22 sites within ~10 miles of Hart. That's not a problem with your land — it's information about it.
CAFO: CAFOs pose a different contamination profile than chemical sources.
Wash all produce consumed raw thoroughly, especially leafy greens grown near CAFOs.
Check your specific parcel in Hart
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 Hart average
Your land is one point inside Hart
Everything above resolves to Hart as a whole — one PHZM band and one 28°F frost record, read across 472 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 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 Hart Average
Hart Average
- ●USDA Zones 7a, averaged across Hart
- ●One soil character for all of Hart
- ●Frost dates read at Hart's scale: Apr 4 to Nov 1
YOUR Parcel
- ✓Your exact zone, not Hart's 7a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Hart
Pull a site-specific report for your exact address in Hart, Texas — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Hart averages can't show:
We read public map data around Hart — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Hart average
How we know this about Hart
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 Hart’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 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 Hart
When does frost risk typically end in Hart?
The last hard freeze (28°F) in Hart typically lands around Apr 4, 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 Apr 25.
When is the first frost in Hart?
The first hard freeze (28°F) in Hart typically arrives around Nov 1, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Oct 18, so the watching starts about Oct 2 — about 211 days after the spring freeze cleared.
How long is the growing season in Hart?
Measured between 28°F hard freezes, Hart sees about 211 frost-free days — roughly Apr 4 through Nov 1, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Apr 25 to Oct 18, about 176 days.
Is the soil safe to grow vegetables in Hart?
The federal record around Hart is light — 25 documented sites across the 9 federal source types we checked, mostly CAFO entries (22), the nearest Underground Storage Tanks record about 0.3 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 Hart?
From about Oct 2 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 Nov 1 (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 Nov 1. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Hart's scale — its 7a band and its 211-day season. Your yard writes its own version of Hart'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 Hart’s own scale
6 of the readings below were taken at Hart's own scale — its own ~211-day season between 28°F freezes, the 472 acres it covers and 25 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Hart's own USDA hardiness band, zones 7aUSDA PHZM 2023
- Hart's own 28°F hard-freeze dates, about Apr 4 and Nov 1 and the ~211-day span between themNOAA 1991–2020 Climate Normals
- 25 documented contamination sites on the federal record near Hart, the closest Underground Storage Tanks record about 0.3 miles out from the town centreFederal environmental registers
- Hart's boundary and the 472 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 7a and a ~211-day seasonGrowable Ground crop-matching engine
- The ecoregion at Hart's own centroid, the High PlainsUS EPA Level III Ecoregions
Inherited from a wider read
- Soil character — no town-scale survey exists, so Hart's 472 acres read through its county's SSURGO summaryfrom Castro County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Castro County
- The growing challenges every Texas grower plans around — written at state scale, so they stay on the state guidefrom Texas
- Butterfly and beetle records, and the farmland pesticide estimate — all published county-widefrom Castro County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Hart's 472 acreswhy one lot differs from the next →
- Which side of Hart you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 472 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Underground Storage Tanks record about 0.3 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 Hart-wide figureread your own land →