Rio Vista, Texas, sits in USDA hardiness zone 8b — room for a real mix of vegetables, fruit, and perennials matched to the local frost calendar.
Growers here do well with cabbage, fig, california poppy, and collard greens — with the usual caveat that any single yard's soil, sun, and drainage cast the deciding vote.
Even in Rio Vista, 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 Rio Vista 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 Rio Vista — soil, climate, flood, and parcel records. How we handle your address.
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Rio Vista — the short answer
Rio Vista, Texas: USDA zone 8b, about 283 days between hard freezes, across 705 acres of city.
- USDA zone
- 8b
- USDA PHZM 2023
- Last hard freeze (28°F)
- Feb 20
- Johnson County normal — NOAA 1991–2020, nearest to this town
- First hard freeze (28°F)
- Nov 30
- Johnson County normal — NOAA 1991–2020, nearest to this town
- Days between freezes
- ~283
- Johnson County normal — NOAA 1991–2020, nearest to this town
- City area
- 705 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 Johnson County’s — the closest measured record, labelled as such rather than passed off as local.
Hardiness Zone Range
Zone 8b is Rio Vista's average, not your lot's — a low corner or a tree line moves it. Against Rio Vista's 283-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Rio Vista
Each reading below is measured for Rio Vista itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
From county recordsRio Vista runs about 283 days between hard freezes (read from Johnson County, the closest normal to Rio Vista) — 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
MeasuredRio Vista 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 Rio Vista is in
Rio Vista sits in the Cross Timbers — EPA Level III, inside the wider Great Plains. That is read at Rio Vista's own centroid rather than borrowed from Johnson County.
What Grows in Rio Vista
Every plant below cleared Rio Vista's own zone 8b and its 283-day season. Each card opens that plant's Texas profile. How we score.
Is it too late to plant in Rio Vista?
Usually not — gardeners here simply switch what goes in the ground as the season moves. Cool-season crops can go in from around Jan 23; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Feb 20 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Nov 30 — 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 Rio Vista
Closest first, within ~10 miles of Rio Vista. Listing isn't leaking, and distance isn't exposure.
- VACANT SERVICE STATIONUnderground Storage Tanks · 700 ft
- RIVER RUN TEXACOUnderground Storage Tanks · 1400 ft
- BONEY JOESUnderground Storage Tanks · 1500 ft
- PHILLIPPES COLLISION & SALVAGE CENTER IBrownfields · 1700 ft
- RIO VISTA FOOD CENTERUnderground Storage Tanks · 1700 ft
- KWIK MARTUnderground Storage Tanks · 0.8 mi
- JOHNS GROCERYUnderground Storage Tanks · 2.0 mi
- HILLTOP COUNTRY STOREUnderground Storage Tanks · 2.2 mi
- BT-32-46-404Nitrate · 4.5 mi
- ROCKIN Y CAFEUnderground Storage Tanks · 4.6 mi
- H&C FUELSUnderground Storage Tanks · 5.0 mi
- RIVERSTOPUnderground Storage Tanks · 5.3 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Rio Vista'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 Rio Vista.
Total Sites
191
within ~10 miles of Rio Vista
Risk Level
Elevated
Highest-severity
1 Superfund site (none NPL-listed)
Sources Checked
within ~10 miles of Rio Vista
Severity Distribution
within ~10 miles of Rio Vista
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Rio Vista, two things run higher than the national average within ~10 miles of Rio Vista — PFAS (3 sites) and Underground Storage Tanks (171 sites). It's not cause for alarm — it's worth knowing, and there's a sensible way to grow around it.
PFAS: PFAS (per- and polyfluoroalkyl substances) are called "forever chemicals" because they do not biodegrade.
Underground Storage Tanks: Underground storage tanks are the single most common source of soil contamination near homes and gardens.
Test irrigation water source — this is the primary pathway for PFAS to reach garden crops.
Use raised beds with imported soil — this eliminates the primary soil-contact pathway.
Check your specific parcel in Rio Vista
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 Rio Vista average
Your land is one point inside Rio Vista
Everything above resolves to Rio Vista as a whole — one PHZM band, read across 705 acres, with hard-freeze dates borrowed from Johnson 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 Rio Vista Average
Rio Vista Average
- ●USDA Zones 8b, averaged across Rio Vista
- ●One soil character for all of Rio Vista
- ●Frost dates read at Rio Vista's scale: Feb 20 to Nov 30
YOUR Parcel
- ✓Your exact zone, not Rio Vista's 8b
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Rio Vista
Pull a site-specific report for your exact address in Rio Vista, Texas — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Rio Vista averages can't show:
We read public map data around Rio Vista — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Rio Vista average
How we know this about Rio Vista
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 Johnson 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 Rio Vista
When does frost risk typically end in Rio Vista?
The last hard freeze (28°F) in Rio Vista typically lands around Feb 20, 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 13.
When is the first frost in Rio Vista?
The first hard freeze (28°F) in Rio Vista typically arrives around Nov 30, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Nov 16, so the watching starts about Oct 31 — about 283 days after the spring freeze cleared.
How long is the growing season in Rio Vista?
Measured between 28°F hard freezes, Rio Vista sees about 283 frost-free days — roughly Feb 20 through Nov 30, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Mar 13 to Nov 16, about 248 days.
Is the soil safe to grow vegetables in Rio Vista?
The federal record around Rio Vista is a meaningful one — 191 documented sites, mostly Underground Storage Tanks entries (171), the nearest Underground Storage Tanks record about 0.1 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 Rio Vista?
From about Oct 31 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 30 (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 30. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Rio Vista's scale — its 8b band and its 283-day season. Your yard writes its own version of Rio Vista'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 Rio Vista’s own scale
5 of the readings below were taken at Rio Vista's own scale — the 705 acres it covers and 191 documented sites around it; 5 are borrowed from a wider read, named and linked below.
Measured here
- Rio Vista's own USDA hardiness band, zones 8bUSDA PHZM 2023
- 191 documented contamination sites on the federal record near Rio Vista, the closest Underground Storage Tanks record about 0.1 miles out from the town centreFederal environmental registers
- Rio Vista's boundary and the 705 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 8b and a ~283-day seasonGrowable Ground crop-matching engine
- The ecoregion at Rio Vista's own centroid, the Cross TimbersUS EPA Level III Ecoregions
Inherited from a wider read
- The 28°F hard-freeze dates — Rio Vista has no normal of its own, so its county's is the closest measured readfrom Johnson County
- Soil character — no town-scale survey exists, so Rio Vista's 705 acres read through its county's SSURGO summaryfrom Johnson County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Johnson 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 Johnson County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Rio Vista's 705 acreswhy one lot differs from the next →
- Which side of Rio Vista you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 705 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Underground Storage Tanks record about 0.1 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 Rio Vista-wide figureread your own land →
More in Texas
Wider growing context
What grows across TexasRio Vista sits outside our named growing regions, so Texas as a whole is its closest context here.
Nearby growing guides