Grey Forest, Texas, sits in USDA hardiness zone 9a — room for a real mix of vegetables, fruit, and perennials matched to the local frost calendar.
Expect artichoke, fig, california poppy, and cabbage to be strong candidates here; the deciding factors on any one parcel stay local — soil, sun, and drainage.
Even in Grey Forest, 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 Grey Forest 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 Grey Forest — soil, climate, flood, and parcel records. How we handle your address.
No card required · your full report in seconds
Grey Forest — the short answer
Grey Forest, Texas: USDA zone 9a, about 306 days between hard freezes, across 465 acres of city.
- USDA zone
- 9a
- USDA PHZM 2023
- Last hard freeze (28°F)
- Feb 6
- Bexar County normal — NOAA 1991–2020, nearest to this town
- First hard freeze (28°F)
- Dec 9
- Bexar County normal — NOAA 1991–2020, nearest to this town
- Days between freezes
- ~306
- Bexar County normal — NOAA 1991–2020, nearest to this town
- City area
- 465 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 Bexar County’s — the closest measured record, labelled as such rather than passed off as local.
Hardiness Zone Range
Zone 9a is Grey Forest's average, not your lot's — a low corner or a tree line moves it. Against Grey Forest's 306-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Grey Forest
Each reading below is measured for Grey Forest itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
From county recordsGrey Forest runs about 306 days between hard freezes (read from Bexar County, the closest normal to Grey Forest) — 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
MeasuredGrey Forest 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 Grey Forest is in
Grey Forest sits in the Edwards Plateau — EPA Level III, inside the wider Great Plains. That is read at Grey Forest's own centroid, and it is not what its county reads: Bexar County is mostly Texas Blackland Prairies. The wider page above you is answering a different question about different ground.
What Grows in Grey Forest
Every plant below cleared Grey Forest's own zone 9a and its 306-day season. Each card opens that plant's Texas profile. How we score.
Is it too late to plant in Grey Forest?
Almost never — the real question is what to plant next. 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 9 — 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 Grey Forest
Survey cells within 31 miles of Grey Forest checked for spotted lanternfly, none carrying a detection — a surveyed negative, not an absence of looking. Nearest documented record 676 miles off. What to watch for.
What's on the federal record near Grey Forest
Closest first, within ~10 miles of Grey Forest. Listing isn't leaking, and distance isn't exposure.
- CEDAR CREEK GOLF COURSEUnderground Storage Tanks · 2.0 mi
- AY-68-27-101Nitrate · 2.2 mi
- BLUEBONNET TRANSPORTATIONBrownfields · 2.5 mi
- CORNER STORE 1088Underground Storage Tanks · 2.5 mi
- AY-68-27-508Nitrate · 3.2 mi
- AY-68-27-517Nitrate · 3.4 mi
- AY-68-27-503Nitrate · 3.4 mi
- AY-68-27-510Nitrate · 3.5 mi
- HOME DEPOT STORE 6547Brownfields · 3.5 mi
- KWIK CHEK 60Underground Storage Tanks · 3.5 mi
- AY-68-27-609 (Western Oak)Nitrate · 3.5 mi
- GASGO MARKETS 10Underground Storage Tanks · 3.5 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Grey Forest'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 Grey Forest.
Sources Checked
within ~10 miles of Grey Forest
Severity Distribution
within ~10 miles of Grey Forest
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Grey Forest, Nitrate runs higher than the national average — 136 sites within ~10 miles of Grey Forest. Knowing it is half the work — and it's nothing a thoughtful grower can't plan for.
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 Grey Forest
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 Grey Forest average
Your land is one point inside Grey Forest
Everything above resolves to Grey Forest as a whole — one PHZM band, read across 465 acres, with hard-freeze dates borrowed from Bexar 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 Grey Forest Average
Grey Forest Average
- ●USDA Zones 9a, averaged across Grey Forest
- ●One soil character for all of Grey Forest
- ●Frost dates read at Grey Forest's scale: Feb 6 to Dec 9
YOUR Parcel
- ✓Your exact zone, not Grey Forest's 9a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Grey Forest
Pull a site-specific report for your exact address in Grey Forest, Texas — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Grey Forest averages can't show:
We read public map data around Grey Forest — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Grey Forest average
How we know this about Grey Forest
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 Bexar 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 Grey Forest
When does frost risk typically end in Grey Forest?
The last hard freeze (28°F) in Grey Forest 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 Grey Forest?
The first hard freeze (28°F) in Grey Forest typically arrives around Dec 9, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Nov 25, so the watching starts about Nov 9 — about 306 days after the spring freeze cleared.
How long is the growing season in Grey Forest?
Measured between 28°F hard freezes, Grey Forest sees about 306 frost-free days — roughly Feb 6 through Dec 9, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Feb 27 to Nov 25, about 271 days.
Is the soil safe to grow vegetables in Grey Forest?
The federal record around Grey Forest is a meaningful one — 519 documented sites, mostly Underground Storage Tanks entries (274), the nearest Underground Storage Tanks record about 2.0 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 Grey Forest?
From about Nov 9 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 9 (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 9. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Grey Forest's scale — its 9a band and its 306-day season. Your yard writes its own version of Grey Forest'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 Grey Forest’s own scale
6 of the readings below were taken at Grey Forest's own scale — the 465 acres it covers and 519 documented sites around it; 5 are borrowed from a wider read, named and linked below.
Measured here
- Grey Forest's own USDA hardiness band, zones 9aUSDA PHZM 2023
- 519 documented contamination sites on the federal record near Grey Forest, the closest Underground Storage Tanks record about 2.0 miles out from the town centreFederal environmental registers
- Grey Forest's boundary and the 465 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 9a and a ~306-day seasonGrowable Ground crop-matching engine
- Grey Forest sits in the Edwards Plateau — not the ecoregion its county mostly readsUS EPA Level III Ecoregions
- Lanternfly survey cells around Grey Forest checked, none carrying a detectionlydemapr (De Bona & Helmus), 10 km survey lattice
Inherited from a wider read
- The 28°F hard-freeze dates — Grey Forest has no normal of its own, so its county's is the closest measured readfrom Bexar County
- Soil character — no town-scale survey exists, so Grey Forest's 465 acres read through its county's SSURGO summaryfrom Bexar County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Bexar 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 Bexar County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Grey Forest's 465 acreswhy one lot differs from the next →
- Which side of Grey Forest you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 465 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Underground Storage Tanks record about 2.0 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 Grey Forest-wide figureread your own land →
More in Texas
Wider growing context
What grows across TexasGrey Forest sits outside our named growing regions, so Texas as a whole is its closest context here.
Nearby growing guides