Geronimo, Texas, sits in USDA hardiness zone 9a — enough range to grow cool-season vegetables, hardy fruit, and warm-season crops that mature before the first hard frost.
Crops well matched to these conditions include artichoke, fig, california poppy, and cabbage — though what thrives on any one site still turns on its specific soil, sun, and drainage.
Even in Geronimo, 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 Geronimo 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 Geronimo — soil, climate, flood, and parcel records. How we handle your address.
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Geronimo — the short answer
Geronimo, Texas: USDA zone 9a, about 302 days between hard freezes, across 5K acres of town.
- USDA zone
- 9a
- USDA PHZM 2023
- Last hard freeze (28°F)
- Feb 6
- Guadalupe County normal — NOAA 1991–2020, nearest to this town
- First hard freeze (28°F)
- Dec 5
- Guadalupe County normal — NOAA 1991–2020, nearest to this town
- Days between freezes
- ~302
- Guadalupe County normal — NOAA 1991–2020, nearest to this town
- Town area
- 5K 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 Guadalupe County’s — the closest measured record, labelled as such rather than passed off as local.
Hardiness Zone Range
Zone 9a is Geronimo's average, not your lot's — a low corner or a tree line moves it. Against Geronimo's 302-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Geronimo
Each reading below is measured for Geronimo itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
From county recordsGeronimo runs about 302 days between hard freezes (read from Guadalupe County, the closest normal to Geronimo) — 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
MeasuredGeronimo 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 Geronimo is in
Geronimo sits in the Texas Blackland Prairies — EPA Level III, inside the wider Great Plains. That is read at Geronimo's own centroid rather than borrowed from Guadalupe County.
What Grows in Geronimo
Every plant below cleared Geronimo's own zone 9a and its 302-day season. Each card opens that plant's Texas profile. How we score.
Is it too late to plant in Geronimo?
Usually not — gardeners here simply switch what goes in the ground as the season moves. Cool-season crops can go in from around Jan 9; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Feb 6 (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.
Documented around Geronimo
Survey cells within 31 miles of Geronimo checked for spotted lanternfly, none carrying a detection — a surveyed negative, not an absence of looking. Nearest documented record 633 miles off. What to watch for.
What's on the federal record near Geronimo
Closest first, within ~10 miles of Geronimo. Listing isn't leaking, and distance isn't exposure.
- KX-67-17-413Nitrate · 0.7 mi
- 7-ELEVEN STORE 40561Underground Storage Tanks · 0.8 mi
- KX-67-17-702Nitrate · 0.9 mi
- NAVARRO ISDUnderground Storage Tanks · 1.1 mi
- KX-67-17-708Nitrate · 1.1 mi
- KX-68-24-603Nitrate · 2.4 mi
- SPRING HILL GULFUnderground Storage Tanks · 2.5 mi
- KX-68-24-602Nitrate · 2.7 mi
- KX-67-17-715Nitrate · 3.1 mi
- Laubach Rd well (GB714) nr Seguin, Tex.Nitrate · 3.3 mi
- KX-67-17-804Nitrate · 3.3 mi
- KX-68-24-601Nitrate · 3.5 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Geronimo'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 Geronimo.
Total Sites
438
within ~10 miles of Geronimo
Risk Level
Elevated
Highest-severity
30 Toxics Release Inventory facilities
Sources Checked
within ~10 miles of Geronimo
Severity Distribution
within ~10 miles of Geronimo
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Geronimo, two things run higher than the national average within ~10 miles of Geronimo — Toxics Release Inventory (30 sites) and Underground Storage Tanks (294 sites). Knowing it is half the work — and it's nothing a thoughtful grower can't plan for.
Toxics Release Inventory: TRI facilities report annual chemical releases to air, water, and land.
Underground Storage Tanks: Underground storage tanks are the single most common source of soil contamination near homes and gardens.
Check prevailing wind direction — downwind parcels face higher exposure than upwind or crosswind locations.
Use raised beds with imported soil — this eliminates the primary soil-contact pathway.
Check your specific parcel in Geronimo
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 Geronimo average
Your land is one point inside Geronimo
Everything above resolves to Geronimo as a whole — one PHZM band, read across 5K acres, with hard-freeze dates borrowed from Guadalupe 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 Geronimo Average
Geronimo Average
- ●USDA Zones 9a, averaged across Geronimo
- ●One soil character for all of Geronimo
- ●Frost dates read at Geronimo's scale: Feb 6 to Dec 5
YOUR Parcel
- ✓Your exact zone, not Geronimo's 9a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Geronimo
Pull a site-specific report for your exact address in Geronimo, Texas — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Geronimo averages can't show:
We read public map data around Geronimo — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Geronimo average
How we know this about Geronimo
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 Guadalupe 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 Geronimo
When does frost risk typically end in Geronimo?
The last hard freeze (28°F) in Geronimo typically lands around Feb 6, 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 27.
When is the first frost in Geronimo?
The first hard freeze (28°F) in Geronimo 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 302 days after the spring freeze cleared.
How long is the growing season in Geronimo?
Measured between 28°F hard freezes, Geronimo sees about 302 frost-free days — roughly Feb 6 through Dec 5, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Feb 27 to Nov 21, about 267 days.
Is the soil safe to grow vegetables in Geronimo?
The federal record around Geronimo is a meaningful one — 438 documented sites, mostly Underground Storage Tanks entries (294), the nearest Nitrate record about 0.7 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 Geronimo?
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 Geronimo's scale — its 9a band and its 302-day season. Your yard writes its own version of Geronimo'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 Geronimo’s own scale
6 of the readings below were taken at Geronimo's own scale — the 5,113 acres it covers and 438 documented sites around it; 5 are borrowed from a wider read, named and linked below.
Measured here
- Geronimo's own USDA hardiness band, zones 9aUSDA PHZM 2023
- 438 documented contamination sites on the federal record near Geronimo, the closest Nitrate record about 0.7 miles out from the town centreFederal environmental registers
- Geronimo's boundary and the 5,113 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 9a and a ~302-day seasonGrowable Ground crop-matching engine
- The ecoregion at Geronimo's own centroid, the Texas Blackland PrairiesUS EPA Level III Ecoregions
- Lanternfly survey cells around Geronimo checked, none carrying a detectionlydemapr (De Bona & Helmus), 10 km survey lattice
Inherited from a wider read
- The 28°F hard-freeze dates — Geronimo has no normal of its own, so its county's is the closest measured readfrom Guadalupe County
- Soil character — no town-scale survey exists, so Geronimo's 5,113 acres read through its county's SSURGO summaryfrom Guadalupe County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Guadalupe 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 Guadalupe County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Geronimo's 5,113 acreswhy one lot differs from the next →
- Which side of Geronimo you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 5,113 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Nitrate record about 0.7 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 Geronimo-wide figureread your own land →
More in Texas
Wider growing context
What grows across TexasGeronimo sits outside our named growing regions, so Texas as a whole is its closest context here.
Nearby growing guides