The Rio Grande Valley spans USDA hardiness zones 9b-10a — a band that supports both cool-season staples and warm-season crops chosen to fit the local frost window.
South Texas' subtropical delta along the Rio Grande — near-frost-free winters growing citrus, sugarcane, and winter vegetables. The conditions favor pecan, tomato, okra, and bluebonnet, among others — though every individual site edits that list with its own soil, sun, and drainage.
The Rio Grande Valley spans Texas.
Your yard isn't the whole Rio Grande Valley.
The Rio Grande Valley spans USDA zones 9b-10a, but your parcel sits in exactly one — and slope, tree cover, and low spots nudge it further. Enter your address and we'll score 1,112 plants against your land's actual soil, sun, and frost.
We read public map data for this spot — soil, climate, flood, and parcel records. How we handle your address.
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Quick Facts
USDA Zones
9b-10a
States
1
Counties
4
Defined by
Counties
Hardiness Zone Range
What Grows in the Rio Grande Valley
Plants matched to the Rio Grande Valley's USDA zones 9b-10a — each links to its full growing profile.
Native Plants Suited to the Rio Grande Valley
US-native plants (USDA PLANTS, Lower 48) whose hardiness range overlaps the Rio Grande Valley’s USDA zones 9b-10a. Zone overlap is a starting filter, not a range map — for plants documented native to your county, your state’s Cooperative Extension or a native-plant society is the authority.
Safe to Grow Here?
What the federal record shows across the Rio Grande Valley — and how to grow with it.
A growing region spans many local records, and contamination is a per-place fact — not a regional verdict. Nationwide we track 1.8M documented sites across 9 federal source types; open the map outlined to the Rio Grande Valley to see exactly what's on record where you grow.
Sources: EPA, USGS — 1.8M documented sites tracked nationwide across 9 federal source types.
Your Specific Parcel Matters
the Rio Grande Valley Average
- ●USDA Zones 9b-10a
- ●Generic soil type for the area
- ●State-average frost dates
YOUR Parcel
- ✓Your exact hardiness zone
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your parcel in the Rio Grande Valley
Pull a site-specific report for your exact address in the Rio Grande Valley — soil, sun, drainage, frost risk, contamination, and scored plant recommendations.
Three things about your exact spot that zone averages miss:
We read public map data for this spot — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources analyzed in seconds
Key Growing Facts for the Rio Grande Valley
- USDA Hardiness Zones: 9b-10a (USDA PHZM 2023, aggregated across the region)
- States: Texas
- Counties covered: 4
- Region boundary: a cluster of neighboring counties
Zone data: USDA ARS Plant Hardiness Zone Map 2023. Region boundary: curated county clusters and EPA Level III ecoregions. County boundaries: US Census TIGER/Line 2025.
Frequently Asked Questions
What hardiness zone is the Rio Grande Valley?
The Rio Grande Valley spans USDA hardiness zones 9b-10a, aggregated from the USDA Agricultural Research Service Plant Hardiness Zone Map 2023 across the region's counties. Zones reflect average annual extreme minimum temperatures from 1991–2020 data.
What grows well in the Rio Grande Valley?
The Rio Grande Valley's conditions suit plants such as Pecan, Tomato, Okra, Bluebonnet, Jalapeno, Peach. For site-specific recommendations scored against your parcel's soil, drainage, and sun data, run the Growable Ground report for your address.
Which states does the Rio Grande Valley cover?
The Rio Grande Valley spans Texas. Each state's full growing guide is linked below.