Linn, Texas, sits in USDA hardiness zone 9b — a zone band wide enough that plant choice, not possibility, is the interesting question.
These conditions suit okra, meyer lemon, california poppy, and artichoke — a starting list any specific site will trim or extend with its own soil, sun, and drainage.
Even in Linn, 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 Linn 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 Linn — soil, climate, flood, and parcel records. How we handle your address.
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Linn — the short answer
Linn, Texas: USDA zone 9b, about 341 days between hard freezes, across 31K acres of town.
- USDA zone
- 9b
- USDA PHZM 2023
- Last hard freeze (28°F)
- Jan 16
- Hidalgo County normal — NOAA 1991–2020, nearest to this town
- First hard freeze (28°F)
- Dec 23
- Hidalgo County normal — NOAA 1991–2020, nearest to this town
- Days between freezes
- ~341
- Hidalgo County normal — NOAA 1991–2020, nearest to this town
- Town area
- 31K 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 Hidalgo County’s — the closest measured record, labelled as such rather than passed off as local.
Hardiness Zone Range
Zone 9b is Linn's average, not your lot's — a low corner or a tree line moves it. Against Linn's 341-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Linn
Each reading below is measured for Linn itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
From county recordsLinn runs about 341 days between hard freezes (read from Hidalgo County, the closest normal to Linn) — 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
MeasuredLinn 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 Linn is in
Linn sits in the Western Gulf Coastal Plain — EPA Level III, inside the wider Great Plains. That is read at Linn's own centroid rather than borrowed from Hidalgo County.
What Grows in Linn
Every plant below cleared Linn's own zone 9b and its 341-day season. Each card opens that plant's Texas profile. How we score.
Is it too late to plant in Linn?
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 16 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Dec 23 — long-season crops need about 90 days of runway, quick greens only 30. Here the calendar nearly circles: cool-season crops take the winter shift, and the next window is always close.
What's on the federal record near Linn
Closest first, within ~10 miles of Linn. Listing isn't leaking, and distance isn't exposure.
- K & B QUIK STOPUnderground Storage Tanks · 2200 ft
- LUIS & VICKY FLORESUnderground Storage Tanks · 0.5 mi
- TRACTOR SUPPLY #1331Brownfields · 0.8 mi
- LOS VENADOS COUNTRY STOREUnderground Storage Tanks · 1.8 mi
- SOUTH TEXAS INTERNATIONAL AIRPORT AT EDINBURGUnderground Storage Tanks · 7.8 mi
- RIO BEEF FEEDYARDCAFO · 9.0 mi
- TENNESSEE GAS PIPELINE DISTRICT 409Underground Storage Tanks · 9.5 mi
Measured from Linn'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 Linn.
Total Sites
7
within ~10 miles of Linn
Risk Level
Low
Highest-severity
1 concentrated animal feeding operation
Sources Checked
within ~10 miles of Linn
Severity Distribution
within ~10 miles of Linn
Highest-Severity Sites
Know Before You Grow
- •Underground tanks leak petroleum as they age — near a former filling station, test the soil.
- •Near a brownfield, raised beds of imported soil give your food clean ground.
- •Large animal operations push nitrates and bacteria downstream. Below one, test your water.
Check your specific parcel in Linn
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 Linn average
Your land is one point inside Linn
Everything above resolves to Linn as a whole — one PHZM band, read across 31K acres, with hard-freeze dates borrowed from Hidalgo 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 Linn Average
Linn Average
- ●USDA Zones 9b, averaged across Linn
- ●One soil character for all of Linn
- ●Frost dates read at Linn's scale: Jan 16 to Dec 23
YOUR Parcel
- ✓Your exact zone, not Linn's 9b
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Linn
Pull a site-specific report for your exact address in Linn, Texas — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Linn averages can't show:
We read public map data around Linn — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Linn average
How we know this about Linn
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 Hidalgo 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 Linn
When does frost risk typically end in Linn?
The last hard freeze (28°F) in Linn 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 Linn?
The first hard freeze (28°F) in Linn typically arrives around Dec 23, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Dec 9, so the watching starts about Nov 23 — about 341 days after the spring freeze cleared.
How long is the growing season in Linn?
Measured between 28°F hard freezes, Linn sees about 341 frost-free days — roughly Jan 16 through Dec 23, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Feb 6 to Dec 9, about 306 days.
Is the soil safe to grow vegetables in Linn?
The federal record around Linn is light — 7 documented sites across the 9 federal source types we checked, mostly Underground Storage Tanks entries (5), the nearest Underground Storage Tanks record about 0.4 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 Linn?
From about Nov 23 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 23 (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 23. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Linn's scale — its 9b band and its 341-day season. Your yard writes its own version of Linn'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 Linn’s own scale
5 of the readings below were taken at Linn's own scale — the 31,087 acres it covers and 7 documented sites around it; 5 are borrowed from a wider read, named and linked below.
Measured here
- Linn's own USDA hardiness band, zones 9bUSDA PHZM 2023
- 7 documented contamination sites on the federal record near Linn, the closest Underground Storage Tanks record about 0.4 miles out from the town centreFederal environmental registers
- Linn's boundary and the 31,087 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 9b and a ~341-day seasonGrowable Ground crop-matching engine
- The ecoregion at Linn's own centroid, the Western Gulf Coastal PlainUS EPA Level III Ecoregions
Inherited from a wider read
- The 28°F hard-freeze dates — Linn has no normal of its own, so its county's is the closest measured readfrom Hidalgo County
- Soil character — no town-scale survey exists, so Linn's 31,087 acres read through its county's SSURGO summaryfrom Hidalgo County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Hidalgo 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 Hidalgo County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Linn's 31,087 acreswhy one lot differs from the next →
- Which side of Linn you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 31,087 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Underground Storage Tanks record about 0.4 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 Linn-wide figureread your own land →
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