Royse City, Texas, sits in USDA hardiness zone 8b — room for a real mix of vegetables, fruit, and perennials matched to the local frost calendar.
These conditions suit cabbage, fig, california poppy, and collard greens — a starting list any specific site will trim or extend with its own soil, sun, and drainage.
Even in Royse City, 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 Royse City 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 Royse City — soil, climate, flood, and parcel records. How we handle your address.
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Royse City — the short answer
Royse City, Texas: USDA zone 8b, about 285 days between hard freezes, across 13K acres of city.
- USDA zone
- 8b
- USDA PHZM 2023
- Last hard freeze (28°F)
- Feb 17
- Rockwall County normal — NOAA 1991–2020, nearest to this town
- First hard freeze (28°F)
- Nov 29
- Rockwall County normal — NOAA 1991–2020, nearest to this town
- Days between freezes
- ~285
- Rockwall County normal — NOAA 1991–2020, nearest to this town
- City area
- 13K 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 Rockwall County’s — the closest measured record, labelled as such rather than passed off as local.
Hardiness Zone Range
Zone 8b is Royse City's average, not your lot's — a low corner or a tree line moves it. Against Royse City's 285-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Royse City
Each reading below is measured for Royse City itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
From county recordsRoyse City runs about 285 days between hard freezes (read from Rockwall County, the closest normal to Royse City) — 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
MeasuredRoyse City 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 Royse City is in
Royse City sits in the Texas Blackland Prairies — EPA Level III, inside the wider Great Plains. That is read at Royse City's own centroid rather than borrowed from Rockwall County.
What Grows in Royse City
Every plant below cleared Royse City's own zone 8b and its 285-day season. Each card opens that plant's Texas profile. How we score.
Is it too late to plant in Royse City?
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 20; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Feb 17 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Nov 29 — long-season crops need about 90 days of runway, quick greens only 30. And with a calendar this mild, the honest answer is that planting barely stops — winter opens seasons colder regions never see.
What's on the federal record near Royse City
Closest first, within ~10 miles of Royse City. Listing isn't leaking, and distance isn't exposure.
- PRIME TRAVELUnderground Storage Tanks · 2100 ft
- SUNMART 106Underground Storage Tanks · 2400 ft
- WALMART SUPERCENTER 259Brownfields · 0.6 mi
- ROYSE CITY ISDUnderground Storage Tanks · 0.6 mi
- LATTIMORE MATERIALS CORP - ROYSE CITY RMXToxics Release Inventory · 0.6 mi
- LATTIMORE MATERIALS COMPANYToxics Release Inventory · 0.6 mi
- ROYSE CITY CBPToxics Release Inventory · 0.6 mi
- HOME DEPOT STOR 531Brownfields · 0.7 mi
- J-MARTUnderground Storage Tanks · 0.7 mi
- FAMILY DOLLAR #5421Brownfields · 0.7 mi
- QUALITY RUNNING GEARUnderground Storage Tanks · 0.8 mi
- KUIPERS KUALITY WAX INCBrownfields · 0.9 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Royse City'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 Royse City.
Total Sites
148
within ~10 miles of Royse City
Risk Level
Elevated
Highest-severity
1 Superfund site (none NPL-listed)
Sources Checked
within ~10 miles of Royse City
Severity Distribution
within ~10 miles of Royse City
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Royse City, two things run higher than the national average within ~10 miles of Royse City — PFAS (9 sites) and Toxics Release Inventory (17 sites). That's not a problem with your land — it's information about it.
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 Royse City
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 Royse City average
Your land is one point inside Royse City
Everything above resolves to Royse City as a whole — one PHZM band, read across 13K acres, with hard-freeze dates borrowed from Rockwall 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 Royse City Average
Royse City Average
- ●USDA Zones 8b, averaged across Royse City
- ●One soil character for all of Royse City
- ●Frost dates read at Royse City's scale: Feb 17 to Nov 29
YOUR Parcel
- ✓Your exact zone, not Royse City's 8b
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Royse City
Pull a site-specific report for your exact address in Royse City, Texas — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Royse City averages can't show:
We read public map data around Royse City — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Royse City average
How we know this about Royse City
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 Rockwall 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 Royse City
When does frost risk typically end in Royse City?
The last hard freeze (28°F) in Royse City typically lands around Feb 17, 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 10.
When is the first frost in Royse City?
The first hard freeze (28°F) in Royse City typically arrives around Nov 29, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Nov 15, so the watching starts about Oct 30 — about 285 days after the spring freeze cleared.
How long is the growing season in Royse City?
Measured between 28°F hard freezes, Royse City sees about 285 frost-free days — roughly Feb 17 through Nov 29, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Mar 10 to Nov 15, about 250 days.
Is the soil safe to grow vegetables in Royse City?
The federal record around Royse City is a meaningful one — 148 documented sites, mostly Underground Storage Tanks entries (91), the nearest Underground Storage Tanks record about 0.4 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 Royse City?
From about Oct 30 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 Nov 29 (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 Nov 29. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Royse City's scale — its 8b band and its 285-day season. Your yard writes its own version of Royse City'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 Royse City’s own scale
5 of the readings below were taken at Royse City's own scale — the 12,916 acres it covers and 148 documented sites around it; 5 are borrowed from a wider read, named and linked below.
Measured here
- Royse City's own USDA hardiness band, zones 8bUSDA PHZM 2023
- 148 documented contamination sites on the federal record near Royse City, the closest Underground Storage Tanks record about 0.4 miles out from the town centreFederal environmental registers
- Royse City's boundary and the 12,916 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 8b and a ~285-day seasonGrowable Ground crop-matching engine
- The ecoregion at Royse City's own centroid, the Texas Blackland PrairiesUS EPA Level III Ecoregions
Inherited from a wider read
- The 28°F hard-freeze dates — Royse City has no normal of its own, so its county's is the closest measured readfrom Rockwall County
- Soil character — no town-scale survey exists, so Royse City's 12,916 acres read through its county's SSURGO summaryfrom Rockwall County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Rockwall 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 Rockwall County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Royse City's 12,916 acreswhy one lot differs from the next →
- Which side of Royse City you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 12,916 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 Royse City-wide figureread your own land →
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