Jarrell, Texas, sits in USDA hardiness zone 8b — a zone band wide enough that plant choice, not possibility, is the interesting question.
Well-matched crops include cabbage, fig, california poppy, and collard greens, and the gap between "grows in the area" and "grows in your yard" is closed by soil, sun, and drainage.
Even in Jarrell, 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 Jarrell 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 Jarrell — soil, climate, flood, and parcel records. How we handle your address.
No card required · your full report in seconds
Jarrell — the short answer
Jarrell, Texas: USDA zone 8b, about 292 days between hard freezes, across 2K acres of city.
- USDA zone
- 8b
- USDA PHZM 2023
- Last hard freeze (28°F)
- Feb 13
- Williamson County normal — NOAA 1991–2020, nearest to this town
- First hard freeze (28°F)
- Dec 2
- Williamson County normal — NOAA 1991–2020, nearest to this town
- Days between freezes
- ~292
- Williamson County normal — NOAA 1991–2020, nearest to this town
- City area
- 2K 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 Williamson County’s — the closest measured record, labelled as such rather than passed off as local.
Hardiness Zone Range
Zone 8b is Jarrell's average, not your lot's — a low corner or a tree line moves it. Against Jarrell's 292-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Jarrell
Each reading below is measured for Jarrell itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
From county recordsJarrell runs about 292 days between hard freezes (read from Williamson County, the closest normal to Jarrell) — 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
MeasuredJarrell sits in USDA hardiness zone 8b.
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 Jarrell is in
Jarrell sits in the Texas Blackland Prairies — EPA Level III, inside the wider Great Plains. That is read at Jarrell's own centroid rather than borrowed from Williamson County.
What Grows in Jarrell
Every plant below cleared Jarrell's own zone 8b and its 292-day season. Each card opens that plant's Texas profile. How we score.
Is it too late to plant in Jarrell?
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 16; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Feb 13 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Dec 2 — long-season crops need about 90 days of runway, quick greens only 30. With almost year-round growing weather, timing is about heat and rainfall more than frost — some bench is always in play.
What's on the federal record near Jarrell
Closest first, within ~10 miles of Jarrell. Listing isn't leaking, and distance isn't exposure.
- SONTERRA TRAVEL CENTERUnderground Storage Tanks · 1100 ft
- JARRELL TOWN CENTERUnderground Storage Tanks · 1600 ft
- CEFCO 42Underground Storage Tanks · 1900 ft
- ZK-58-12-4 (Copper Ln)Nitrate · 0.8 mi
- JARRELL SCHWERTNER WSCPFAS · 0.9 mi
- H & H MOBILUnderground Storage Tanks · 1.1 mi
- DOCS ONE STOPUnderground Storage Tanks · 1.1 mi
- JARRELL TEXACOUnderground Storage Tanks · 1.1 mi
- BILLS CORNERUnderground Storage Tanks · 1.2 mi
- JARRELL FACILITYBrownfields · 1.3 mi
- JARRELL PLANTToxics Release Inventory · 1.4 mi
- JARRELL FARM SUPPLYUnderground Storage Tanks · 1.5 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Jarrell'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 Jarrell.
Total Sites
53
within ~10 miles of Jarrell
Risk Level
Elevated
Highest-severity
10 Toxics Release Inventory facilities
Sources Checked
within ~10 miles of Jarrell
Severity Distribution
within ~10 miles of Jarrell
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Jarrell, two things run higher than the national average within ~10 miles of Jarrell — PFAS (3 sites) and Toxics Release Inventory (10 sites). Knowing it is half the work — and it's nothing a thoughtful grower can't plan for.
PFAS: PFAS (per- and polyfluoroalkyl substances) are called "forever chemicals" because they do not biodegrade.
Toxics Release Inventory: TRI facilities report annual chemical releases to air, water, and land.
Test irrigation water source — this is the primary pathway for PFAS to reach garden crops.
Check prevailing wind direction — downwind parcels face higher exposure than upwind or crosswind locations.
Check your specific parcel in Jarrell
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 Jarrell average
Your land is one point inside Jarrell
Everything above resolves to Jarrell as a whole — one PHZM band, read across 2K acres, with hard-freeze dates borrowed from Williamson 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 Jarrell Average
Jarrell Average
- ●USDA Zones 8b, averaged across Jarrell
- ●One soil character for all of Jarrell
- ●Frost dates read at Jarrell's scale: Feb 13 to Dec 2
YOUR Parcel
- ✓Your exact zone, not Jarrell's 8b
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Jarrell
Pull a site-specific report for your exact address in Jarrell, Texas — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Jarrell averages can't show:
We read public map data around Jarrell — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Jarrell average
How we know this about Jarrell
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 Williamson 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 Jarrell
When does frost risk typically end in Jarrell?
The last hard freeze (28°F) in Jarrell typically lands around Feb 13, 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 Mar 6.
When is the first frost in Jarrell?
The first hard freeze (28°F) in Jarrell typically arrives around Dec 2, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Nov 18, so the watching starts about Nov 2 — about 292 days after the spring freeze cleared.
How long is the growing season in Jarrell?
Measured between 28°F hard freezes, Jarrell sees about 292 frost-free days — roughly Feb 13 through Dec 2, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Mar 6 to Nov 18, about 257 days.
Is the soil safe to grow vegetables in Jarrell?
The federal record around Jarrell is a meaningful one — 53 documented sites, mostly Underground Storage Tanks entries (22), the nearest Underground Storage Tanks 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 Jarrell?
From about Nov 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 Dec 2 (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 2. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Jarrell's scale — its 8b band and its 292-day season. Your yard writes its own version of Jarrell'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 Jarrell’s own scale
5 of the readings below were taken at Jarrell's own scale — the 2,340 acres it covers and 53 documented sites around it; 5 are borrowed from a wider read, named and linked below.
Measured here
- Jarrell's own USDA hardiness band, zones 8bUSDA PHZM 2023
- 53 documented contamination sites on the federal record near Jarrell, the closest Underground Storage Tanks record about 0.2 miles out from the town centreFederal environmental registers
- Jarrell's boundary and the 2,340 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 8b and a ~292-day seasonGrowable Ground crop-matching engine
- The ecoregion at Jarrell's own centroid, the Texas Blackland PrairiesUS EPA Level III Ecoregions
Inherited from a wider read
- The 28°F hard-freeze dates — Jarrell has no normal of its own, so its county's is the closest measured readfrom Williamson County
- Soil character — no town-scale survey exists, so Jarrell's 2,340 acres read through its county's SSURGO summaryfrom Williamson County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Williamson 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 Williamson County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Jarrell's 2,340 acreswhy one lot differs from the next →
- Which side of Jarrell you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 2,340 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Underground Storage Tanks 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 Jarrell-wide figureread your own land →
More in Texas
Growing region