Dammeron Valley, Utah, sits in USDA hardiness zone 8a — a band that supports both cool-season staples and warm-season crops chosen to fit the local frost window.
Crops well matched to these conditions include cabbage, fig, california poppy, and collard greens — though what thrives on any one site still turns on its specific soil, sun, and drainage.
Even in Dammeron Valley, 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 Dammeron Valley 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 Dammeron Valley — soil, climate, flood, and parcel records. How we handle your address.
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Dammeron Valley — the short answer
Dammeron Valley, Utah: USDA zone 8a, about 254 days between hard freezes, across 3K acres of town.
- USDA zone
- 8a
- USDA PHZM 2023
- Last hard freeze (28°F)
- Mar 9
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Nov 18
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~254
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Town area
- 3K acres
- US Census TIGER/Line 2025
Every figure names the dataset it came from. Hard-freeze dates are this town’s own 28°F normals: light frosts run a few weeks past them, and tender transplants usually wait 2–3 weeks after the last hard freeze.
Hardiness Zone Range
Zone 8a is Dammeron Valley's average, not your lot's — a low corner or a tree line moves it. Against Dammeron Valley's 254-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Dammeron Valley
Each reading below is measured for Dammeron Valley itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredDammeron Valley runs about 254 days between hard freezes — a long growing season.
There is slack for succession plantings and slow-finishing crops: many vegetables can be sown twice, and the heat-lovers have time to ripen fully.
Plan a second sowing of quick crops after the first comes out, and use the fall window most gardeners let sit idle.
NOAA 1991–2020 Climate Normals
Winter hardiness
MeasuredDammeron Valley sits in USDA hardiness zone 8a.
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 Dammeron Valley is in
Dammeron Valley sits in the Central Basin and Range — EPA Level III, inside the wider North American Deserts. That is read at Dammeron Valley's own centroid, and it is not what its county reads: Washington County is mostly Mojave Basin and Range. The wider page above you is answering a different question about different ground.
What Grows in Dammeron Valley
Every plant below cleared Dammeron Valley's own zone 8a and its 254-day season. Each card opens that plant's Utah profile. How we score.
Is it too late to plant in Dammeron Valley?
Almost never — the real question is what to plant next. Cool-season crops can go in from around Feb 9; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Mar 9 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Nov 18 — long-season crops need about 90 days of runway, quick greens only 30. With a season this long, “too late” mostly means “switch crops” — second sowings and a full fall garden are the norm, with garlic closing the year.
What's on the federal record near Dammeron Valley
Closest first, within ~10 miles of Dammeron Valley. Listing isn't leaking, and distance isn't exposure.
- SPANISH TRAIL SUPPLYUnderground Storage Tanks · 2.7 mi
- VEYO MERCUnderground Storage Tanks · 2.8 mi
- (C-41-16) 4bcc- 1Nitrate · 3.9 mi
- (C-41-16) 9cba- 1Nitrate · 5.0 mi
- (C-40-17)21dca- 2Nitrate · 5.1 mi
- (C-41-16)16bbd- 1Nitrate · 5.5 mi
- IVINSPFAS · 6.3 mi
- (C-41-16)23aaa- 1Nitrate · 7.1 mi
- SUNROC CORPORATIONToxics Release Inventory · 7.4 mi
- UnknownMining · 7.4 mi
- GUNLOCK SPECIAL SERVICE DISTRICTPFAS · 7.7 mi
- (C-41-17) 8bad- 1Nitrate · 7.8 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Dammeron Valley'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 Dammeron Valley.
Total Sites
41
within ~10 miles of Dammeron Valley
Risk Level
Elevated
Highest-severity
1 Superfund site (none NPL-listed)
Sources Checked
within ~10 miles of Dammeron Valley
Severity Distribution
within ~10 miles of Dammeron Valley
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Dammeron Valley, two things run higher than the national average within ~10 miles of Dammeron Valley — Nitrate (30 sites) and Mining (3 sites). 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.
Mining: Mining sites — both historic and active — can leach heavy metals (arsenic, lead, cadmium, mercury) into soil and water for centuries after operations cease.
Test well water for nitrate if you rely on a private well for irrigation (EPA standard: 10 mg/L).
Test soil for heavy metals (lead, arsenic, cadmium, mercury) — this is essential near any mining site.
Check your specific parcel in Dammeron Valley
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 Dammeron Valley average
Your land is one point inside Dammeron Valley
Everything above resolves to Dammeron Valley as a whole — one PHZM band and one 28°F frost record, read across 3K acres. 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 Dammeron Valley Average
Dammeron Valley Average
- ●USDA Zones 8a, averaged across Dammeron Valley
- ●One soil character for all of Dammeron Valley
- ●Frost dates read at Dammeron Valley's scale: Mar 9 to Nov 18
YOUR Parcel
- ✓Your exact zone, not Dammeron Valley's 8a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Dammeron Valley
Pull a site-specific report for your exact address in Dammeron Valley, Utah — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Dammeron Valley averages can't show:
We read public map data around Dammeron Valley — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Dammeron Valley average
How we know this about Dammeron Valley
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 Dammeron Valley’s own record; 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 Dammeron Valley
When does frost risk typically end in Dammeron Valley?
The last hard freeze (28°F) in Dammeron Valley typically lands around Mar 9, 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 30.
When is the first frost in Dammeron Valley?
The first hard freeze (28°F) in Dammeron Valley typically arrives around Nov 18, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Nov 4, so the watching starts about Oct 19 — about 254 days after the spring freeze cleared.
How long is the growing season in Dammeron Valley?
Measured between 28°F hard freezes, Dammeron Valley sees about 254 frost-free days — roughly Mar 9 through Nov 18, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Mar 30 to Nov 4, about 219 days.
Is the soil safe to grow vegetables in Dammeron Valley?
The federal record around Dammeron Valley is a meaningful one — 41 documented sites, mostly Nitrate entries (30), the nearest Underground Storage Tanks record about 2.7 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 Dammeron Valley?
From about Oct 19 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 18 (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 18. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Dammeron Valley's scale — its 8a band and its 254-day season. Your yard writes its own version of Dammeron Valley'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 Dammeron Valley’s own scale
6 of the readings below were taken at Dammeron Valley's own scale — its own ~254-day season between 28°F freezes, the 3,129 acres it covers and 41 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Dammeron Valley's own USDA hardiness band, zones 8aUSDA PHZM 2023
- Dammeron Valley's own 28°F hard-freeze dates, about Mar 9 and Nov 18 and the ~254-day span between themNOAA 1991–2020 Climate Normals
- 41 documented contamination sites on the federal record near Dammeron Valley, the closest Underground Storage Tanks record about 2.7 miles out from the town centreFederal environmental registers
- Dammeron Valley's boundary and the 3,129 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 8a and a ~254-day seasonGrowable Ground crop-matching engine
- Dammeron Valley sits in the Central Basin and Range — not the ecoregion its county mostly readsUS EPA Level III Ecoregions
Inherited from a wider read
- Soil character — no town-scale survey exists, so Dammeron Valley's 3,129 acres read through its county's SSURGO summaryfrom Washington County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Washington County
- The growing challenges every Utah grower plans around — written at state scale, so they stay on the state guidefrom Utah
- Butterfly and beetle records, and the farmland pesticide estimate — all published county-widefrom Washington County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Dammeron Valley's 3,129 acreswhy one lot differs from the next →
- Which side of Dammeron Valley you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 3,129 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Underground Storage Tanks record about 2.7 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 Dammeron Valley-wide figureread your own land →
More in Utah
Wider growing context
What grows across UtahDammeron Valley sits outside our named growing regions, so Utah as a whole is its closest context here.
Nearby growing guides