Sealy, Texas, sits in USDA hardiness zone 9a — a zone band wide enough that plant choice, not possibility, is the interesting question.
Reliable performers under these conditions include artichoke, fig, california poppy, and cabbage; what your own ground favors still comes down to its soil, sun, and drainage.
Even in Sealy, 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 Sealy 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 Sealy — soil, climate, flood, and parcel records. How we handle your address.
No card required · your full report in seconds
Sealy — the short answer
Sealy, Texas: USDA zone 9a, about 304 days between hard freezes, across 8K acres of city.
- USDA zone
- 9a
- USDA PHZM 2023
- Last hard freeze (28°F)
- Feb 4
- Austin County normal — NOAA 1991–2020, nearest to this town
- First hard freeze (28°F)
- Dec 5
- Austin County normal — NOAA 1991–2020, nearest to this town
- Days between freezes
- ~304
- Austin County normal — NOAA 1991–2020, nearest to this town
- City area
- 8K 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 Austin County’s — the closest measured record, labelled as such rather than passed off as local.
Hardiness Zone Range
Zone 9a is Sealy's average, not your lot's — a low corner or a tree line moves it. Against Sealy's 304-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Sealy
Each reading below is measured for Sealy itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
From county recordsSealy runs about 304 days between hard freezes (read from Austin County, the closest normal to Sealy) — 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
MeasuredSealy 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 Sealy is in
Sealy sits in the Western Gulf Coastal Plain — EPA Level III, inside the wider Great Plains. That is read at Sealy's own centroid rather than borrowed from Austin County.
What Grows in Sealy
Every plant below cleared Sealy's own zone 9a and its 304-day season. Each card opens that plant's Texas profile. How we score.
Is it too late to plant in Sealy?
Too late for some crops, right on time for others — a growing season is a sequence, not a deadline. Cool-season crops can go in from around Jan 7; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Feb 4 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Dec 5 — 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 Sealy
Closest first, within ~10 miles of Sealy. Listing isn't leaking, and distance isn't exposure.
- JONES G FINKEUnderground Storage Tanks · 1700 ft
- AVIS HAIR AFFAIRUnderground Storage Tanks · 2000 ft
- SEALY BEES GROCERSUnderground Storage Tanks · 2100 ft
- OLD EXXON GAS STATIONUnderground Storage Tanks · 2200 ft
- TPG 547 07Underground Storage Tanks · 0.5 mi
- STAR ENTERPRISEBrownfields · 0.5 mi
- TIGER TOTE 26Underground Storage Tanks · 0.5 mi
- FRANK VECERAUnderground Storage Tanks · 0.6 mi
- COLORADO COUNTY OILBrownfields · 0.6 mi
- SEALY SHELLUnderground Storage Tanks · 0.6 mi
- PWI 123Underground Storage Tanks · 0.6 mi
- TRACTOR SUPPLY COMPANY #1872Brownfields · 0.7 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Sealy'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 Sealy.
Total Sites
100
within ~10 miles of Sealy
Risk Level
Moderate
Highest-severity
6 Toxics Release Inventory facilities
Sources Checked
within ~10 miles of Sealy
Severity Distribution
within ~10 miles of Sealy
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Sealy, Nitrate runs higher than the national average — 36 sites within ~10 miles of Sealy. That's not a problem with your land — it's information about 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 Sealy
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 Sealy average
Your land is one point inside Sealy
Everything above resolves to Sealy as a whole — one PHZM band, read across 8K acres, with hard-freeze dates borrowed from Austin 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 Sealy Average
Sealy Average
- ●USDA Zones 9a, averaged across Sealy
- ●One soil character for all of Sealy
- ●Frost dates read at Sealy's scale: Feb 4 to Dec 5
YOUR Parcel
- ✓Your exact zone, not Sealy's 9a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Sealy
Pull a site-specific report for your exact address in Sealy, Texas — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Sealy averages can't show:
We read public map data around Sealy — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Sealy average
How we know this about Sealy
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 Austin 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 Sealy
When does frost risk typically end in Sealy?
The last hard freeze (28°F) in Sealy typically lands around Feb 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 Feb 25.
When is the first frost in Sealy?
The first hard freeze (28°F) in Sealy typically arrives around Dec 5, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Nov 21, so the watching starts about Nov 5 — about 304 days after the spring freeze cleared.
How long is the growing season in Sealy?
Measured between 28°F hard freezes, Sealy sees about 304 frost-free days — roughly Feb 4 through Dec 5, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Feb 25 to Nov 21, about 269 days.
Is the soil safe to grow vegetables in Sealy?
The federal record around Sealy shows 100 documented sites, mostly Underground Storage Tanks entries (42), the nearest Underground Storage Tanks record about 0.3 miles out — a typical footprint for a growing area, and proximity to a documented site is information, not a diagnosis of any one yard. It's worth seeing which recorded sites sit closest to where you grow, and testing the soil before new food beds near any of them.
How do I protect my plants from frost in Sealy?
From about Nov 5 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 5 (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 5. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Sealy's scale — its 9a band and its 304-day season. Your yard writes its own version of Sealy'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 Sealy’s own scale
5 of the readings below were taken at Sealy's own scale — the 7,502 acres it covers and 100 documented sites around it; 5 are borrowed from a wider read, named and linked below.
Measured here
- Sealy's own USDA hardiness band, zones 9aUSDA PHZM 2023
- 100 documented contamination sites on the federal record near Sealy, the closest Underground Storage Tanks record about 0.3 miles out from the town centreFederal environmental registers
- Sealy's boundary and the 7,502 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 9a and a ~304-day seasonGrowable Ground crop-matching engine
- The ecoregion at Sealy's own centroid, the Western Gulf Coastal PlainUS EPA Level III Ecoregions
Inherited from a wider read
- The 28°F hard-freeze dates — Sealy has no normal of its own, so its county's is the closest measured readfrom Austin County
- Soil character — no town-scale survey exists, so Sealy's 7,502 acres read through its county's SSURGO summaryfrom Austin County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Austin 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 Austin County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Sealy's 7,502 acreswhy one lot differs from the next →
- Which side of Sealy you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 7,502 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 Sealy-wide figureread your own land →
More in Texas
Wider growing context
What grows across TexasSealy sits outside our named growing regions, so Texas as a whole is its closest context here.
Nearby growing guides