Summerlin South, Nevada, sits in USDA hardiness zone 9a — a range where zone-matched perennials and frost-aware annual timing set what succeeds.
Among the crops suited to this profile: artichoke, fig, california poppy, and cabbage. The site-level story — soil, sun, drainage — decides the rest.
Even in Summerlin South, 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 Summerlin South 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 Summerlin South — soil, climate, flood, and parcel records. How we handle your address.
No card required · your full report in seconds
Summerlin South — the short answer
Summerlin South, Nevada: USDA zone 9a, about 321 days between hard freezes, across 6K acres of town.
- USDA zone
- 9a
- USDA PHZM 2023
- Last hard freeze (28°F)
- Jan 25
- Clark County normal — NOAA 1991–2020, nearest to this town
- First hard freeze (28°F)
- Dec 12
- Clark County normal — NOAA 1991–2020, nearest to this town
- Days between freezes
- ~321
- Clark County normal — NOAA 1991–2020, nearest to this town
- Town area
- 6K 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 Clark County’s — the closest measured record, labelled as such rather than passed off as local.
Hardiness Zone Range
Zone 9a is Summerlin South's average, not your lot's — a low corner or a tree line moves it. Against Summerlin South's 321-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Summerlin South
Each reading below is measured for Summerlin South itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
From county recordsSummerlin South runs about 321 days between hard freezes (read from Clark County, the closest normal to Summerlin South) — 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
MeasuredSummerlin South 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 Summerlin South is in
Summerlin South sits in the Mojave Basin and Range — EPA Level III, inside the wider North American Deserts. That is read at Summerlin South's own centroid rather than borrowed from Clark County.
What Grows in Summerlin South
Every plant below cleared Summerlin South's own zone 9a and its 321-day season. Each card opens that plant's Nevada profile. How we score.
Is it too late to plant in Summerlin South?
Usually not — gardeners here simply switch what goes in the ground as the season moves. Cool-season crops can go in from around Jan 1; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Jan 25 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Dec 12 — long-season crops need about 90 days of runway, quick greens only 30. Here the calendar nearly circles: cool-season crops take the winter shift, and the next window is always close.
What's on the federal record near Summerlin South
Closest first, within ~10 miles of Summerlin South. Listing isn't leaking, and distance isn't exposure.
- Terrible Herbst #253Underground Storage Tanks · 2100 ft
- ROSEMAN UNIVERSITY OF HEALTH SCIENCES (SUMMERLIN CAMPUS)Brownfields · 0.6 mi
- LAS VEGAS PAVING - KAPEXToxics Release Inventory · 0.9 mi
- Speedee Mart #119Underground Storage Tanks · 1.0 mi
- ALBERTSONS #6021Brownfields · 1.3 mi
- CALIBER COLLISION CENTER - SUMMERLIN 0247Brownfields · 1.4 mi
- Haddies ChevronUnderground Storage Tanks · 1.5 mi
- TARGET STORE #1524Brownfields · 1.6 mi
- PENNEY OPCO LLC 2848Brownfields · 1.7 mi
- Rebel Store #2176Underground Storage Tanks · 1.7 mi
- MACYS SUMMERLIN #558Brownfields · 1.7 mi
- Green Valley Grocery #49Underground Storage Tanks · 1.7 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Summerlin South'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 Summerlin South.
Total Sites
1,275
within ~10 miles of Summerlin South
Risk Level
High
Highest-severity
4 Superfund sites (none NPL-listed)
Sources Checked
within ~10 miles of Summerlin South
Severity Distribution
within ~10 miles of Summerlin South
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Summerlin South, PFAS runs higher than the national average — 15 sites within ~10 miles of Summerlin South. 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.
Test irrigation water source — this is the primary pathway for PFAS to reach garden crops.
Check your specific parcel in Summerlin South
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 Summerlin South average
Your land is one point inside Summerlin South
Everything above resolves to Summerlin South as a whole — one PHZM band, read across 6K acres, with hard-freeze dates borrowed from Clark 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 Summerlin South Average
Summerlin South Average
- ●USDA Zones 9a, averaged across Summerlin South
- ●One soil character for all of Summerlin South
- ●Frost dates read at Summerlin South's scale: Jan 25 to Dec 12
YOUR Parcel
- ✓Your exact zone, not Summerlin South's 9a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Summerlin South
Pull a site-specific report for your exact address in Summerlin South, Nevada — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Summerlin South averages can't show:
We read public map data around Summerlin South — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Summerlin South average
How we know this about Summerlin South
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 Clark 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 Summerlin South
When does frost risk typically end in Summerlin South?
The last hard freeze (28°F) in Summerlin South typically lands around Jan 25, 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 15.
When is the first frost in Summerlin South?
The first hard freeze (28°F) in Summerlin South typically arrives around Dec 12, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Nov 28, so the watching starts about Nov 12 — about 321 days after the spring freeze cleared.
How long is the growing season in Summerlin South?
Measured between 28°F hard freezes, Summerlin South sees about 321 frost-free days — roughly Jan 25 through Dec 12, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Feb 15 to Nov 28, about 286 days.
Is the soil safe to grow vegetables in Summerlin South?
The federal record around Summerlin South runs heavier than most — 1,275 documented sites, mostly Underground Storage Tanks entries (670), the nearest Underground Storage Tanks record about 0.4 miles out — so test the soil before planting food in the ground, and raised beds with clean imported soil grow well in the meantime. Even here, proximity to a documented site is information, not a diagnosis of any one yard; the contamination map shows exactly what's recorded and where.
How do I protect my plants from frost in Summerlin South?
From about Nov 12 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 12 (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 12. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Summerlin South's scale — its 9a band and its 321-day season. Your yard writes its own version of Summerlin South'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 Summerlin South’s own scale
5 of the readings below were taken at Summerlin South's own scale — the 6,198 acres it covers and 1,275 documented sites around it; 5 are borrowed from a wider read, named and linked below.
Measured here
- Summerlin South's own USDA hardiness band, zones 9aUSDA PHZM 2023
- 1,275 documented contamination sites on the federal record near Summerlin South, the closest Underground Storage Tanks record about 0.4 miles out from the town centreFederal environmental registers
- Summerlin South's boundary and the 6,198 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 9a and a ~321-day seasonGrowable Ground crop-matching engine
- The ecoregion at Summerlin South's own centroid, the Mojave Basin and RangeUS EPA Level III Ecoregions
Inherited from a wider read
- The 28°F hard-freeze dates — Summerlin South has no normal of its own, so its county's is the closest measured readfrom Clark County
- Soil character — no town-scale survey exists, so Summerlin South's 6,198 acres read through its county's SSURGO summaryfrom Clark County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Clark County
- The growing challenges every Nevada grower plans around — written at state scale, so they stay on the state guidefrom Nevada
- Butterfly and beetle records, and the farmland pesticide estimate — all published county-widefrom Clark County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Summerlin South's 6,198 acreswhy one lot differs from the next →
- Which side of Summerlin South you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 6,198 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 Summerlin South-wide figureread your own land →
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