Generally — Most Areas
allium (zones 4-8) suits most of Nevada (4a-10a) — zones 4-8 are in range, and the rest of the state is the exception.
Allium in Nevada — the short answer
Allium in Nevada: hardy in zones 4–8, full sun, against a state median of ~163 frost-free days.
- Plant zones
- 4-8
- Manual horticultural correction (source not retained); NC State Extension and Missouri Botanical Garden, with the remaining rows from other published sources or Growable Ground compilation
- Nevada zones
- 4a-10a
- USDA PHZM 2023
- Frost window
- Apr 28 - May 20 – Oct 9 - Oct 21
- NOAA RCC ACIS 1991-2020, 28°F
- Shortest county season
- 110 days
- NOAA Regional Climate Centers ACIS, 1991-2020, county 28°F killing freeze
Plant data: Growable Ground Plant Database, compiled from FAO ECOCROP, USDA PLANTS and university Extension sources — per-field provenance varies and is published with the dataset.
Your yard isn't the whole zone.
Nevada spans zones 4a-10a, but your yard has its own microclimate — slope, trees, and low spots shift frost and sun across a single parcel. Enter your address and we'll score allium against your land's actual soil, sun, and frost.
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Nevada is not one climate
A single Nevada answer averages 17 counties whose growing seasons are 211 days apart — from 110 frost-free days in Elko County to 321 in Clark County. Which end of that your land sits nearer changes what allium can finish before the first hard freeze.
The middle half of 17 counties runs 145–174 days, with a median of 163 days — a 211-day span end to end.
Measured across 17 Nevada counties. NOAA Regional Climate Centers ACIS, 1991-2020, county 28°F killing freeze. Quartiles are order statistics — every figure shown is a value a real county recorded, not an interpolation. Your own site sits somewhere inside this range; a parcel report resolves where.
Where in Nevada Fits Best
Allium is rated for zones 4–8 — a cold floor USDA puts at -30 to -20°F. Against Nevada’s 17 counties that band holds in 16 of them, and the line runs at Elko County (zone 5a), the coldest county still inside it.
Inside zones 4–8
16 counties
- Eureka County · zone 5b
- Humboldt County · zone 6a
- White Pine County · zone 6a
3 of 16 shown
Above the zone 8 ceiling
1 county
- Clark County · zone 9a
Too little winter chill rather than too much cold — a low-chill selection is what changes it.
County hardiness zones: USDA Plant Hardiness Zone Map (PHZM) 2023, per county. A zone is a 10°F band of average annual extreme minimum temperature, so the floor above is the band the plant's rating denotes, not a single measured kill point. Slope, shelter and cold-air drainage routinely move a site half a zone either way from its county figure — which is the part only your address resolves.
Even within Nevada's zones 4a-10a, county microclimates differ enough to change what thrives. These counties carry the closest zone match for allium (USDA PHZM 2023):
Zone Comparison
Allium Needs
- USDA Zones: 4-8
- Frost-Free Days: 120+
- Sun: Full Sun
- Mature size: 3 ft tall
- Picking window: ~21 days of harvest
- Drought tolerance: Medium
Nevada Has
- USDA Zones: 4a-10a
- Last Hard Freeze (28°F): Apr 28 - May 20
- First Hard Freeze (28°F): Oct 9 - Oct 21
- Annual Rainfall: 4-12 inches
- Common Soils: Desert sand, Caliche, Alkaline clay
Plant Zone Range (zones 4-8)
Preferred Soil pH
Plant data: Growable Ground Plant Database, compiled from FAO ECOCROP, USDA PLANTS, and university Extension sources — per-field provenance varies and is published with the dataset. State data: USDA ARS PHZM 2023, NOAA Climate Normals, NRCS SSURGO.
When to Plant Allium in Nevada
The frost window
Across Nevada, the last spring hard freeze (28°F) clears between Apr 28 and May 20, and the first fall hard freeze lands between Oct 9 and Oct 21 (NOAA Regional Climate Centers ACIS, 1991-2020). Counting from the latest last freeze to the earliest first freeze, that's a 142-day window you can count on — up to 176 days on a mild site in a kind year. That marks the hard freeze, not the last light frost, so tender transplants usually wait another 2-3 weeks.
Frost hardiness
Allium takes cold down to about 23°F before a freeze kills it (FAO ECOCROP), so you can plant on the early side of Nevada's window — even a few weeks before the final hard freeze. That is the point where cold damages growing tissue, not a winter-survival floor — an established perennial comes through far colder while dormant, which is what its hardiness zone tells you.
Frost window: NOAA Climate Normals 1991-2020. Plant timing fields: Growable Ground Plant Database — frost-free days from FAO ECOCROP, days to harvest from university Extension production guides, and growing-degree-day and chill-hour minimums that are compilation estimates rather than published figures. Your site's own frost dates can run earlier or later than the state range — a parcel report pins them down.
Growing Season Fit
The zone check says allium survives winter in part of Nevada, not across all of it. Whether the season is long enough — and warm enough — is a different question.
Frost-free days
Allium wants 120+ frost-free days; a typical Nevada site sees ~163 (NOAA Regional Climate Centers ACIS, 1991-2020). That leaves a workable window — start indoors to bank time.
GDD and chill-hour figures are computed from PRISM 1991-2020 monthly climate normals; frost-free days from NOAA Regional Climate Centers ACIS, 1991-2020. Each is the state median across its counties (P25/P75 span the within-state spread). Hardiness-zone range is USDA PHZM 2023.
Soil + Drainage Fit
Allium tolerates a wide pH range (pH 4.5-7.5) — 3 units, acid ground through alkaline — so soil acidity is rarely what limits it in Nevada. A soil test is still worth having, but for what else it tells you about this site, not to clear this plant. It will grow across that whole span, but it does best between pH 6 and 6.5 — worth knowing before you decide whether a Nevada soil test result is a problem or just a number. Drainage matters: this plant wants well (dry spells). If your Nevada site is heavier clay or sits in a low spot, raised beds or amendment with compost solve it.
Plant pH requirements: FAO ECOCROP and USDA PLANTS, with the remaining rows from other published sources or Growable Ground compilation. Drainage: FAO ECOCROP, with the remaining rows from other published sources or Growable Ground compilation. Nevada soil profile from USDA NRCS SSURGO. Site-specific verification: a 30-minute soil test from your local Extension lab.
What Else to Consider for Allium in Nevada
Zone compatibility tells you about winter cold survival — but Nevada growers also need to think about:
Extremely low rainfall (driest US state)
Alkaline soils (pH 8-9) limit many species
Extreme summer heat in southern valleys
What to actually do about these — and the constraints that apply to every Nevada grower, not just allium — is covered on the Nevada growing guide.
Timing shifts within Nevada
Allium needs about 120 days of frost-free season to complete its cycle. 16 of Nevada’s 17 counties give it that outright. The tightest that does is Nye County at 128 frost-free days — 8 to spare. Below that line you are transplanting or extending the season, not direct-sowing.
Across Nevada’s 17 counties the frost-free season runs from 110 days in Elko County to 321 days in Clark County — a spread of 211 days, which is why a single statewide planting date misleads. The median Nevada county sees 163 frost-free days, leaving allium about 43 days of slack on a typical parcel — room for a second sowing where the season runs long.
County last-freeze dates and frost-free day counts: NOAA Regional Climate Centers ACIS (1991-2020), county 28°F freeze (earlier than the folk 32°F "last frost"). Allium's 120-day requirement: USDA PLANTS / Growable Ground plant database (minimum frost-free days). A parcel report resolves your address's own frost dates.
Pollinator + Wildlife Value
Allium draws honeybees, native bees, and butterflies (high value, Growable Ground Plant Database). Planting it near vegetable beds can lift fruit set on neighboring crops. Outdoors, allium can only work that bloom inside Nevada's frost window — roughly 163 days, opening after the last 28°F freeze (Apr 28 - May 20) and closing at the first (Oct 9 - Oct 21), per NOAA Regional Climate Centers ACIS, 1991-2020. Deer pressure is meaningful across much of Nevada; allium is listed as deer-resistant (USDA PLANTS Database), which makes it a safer pick for unfenced sites. Our deer & wildlife guide carries the full deer-resistant list and how to protect the rest.
Nevada Cooperative Extension
For Nevada-specific cultivar recommendations, planting calendars, and pest pressure for allium, the canonical source is University of Nevada, Reno Extension. Their fact sheets carry the local trial data we can't generalize across 50 states.
Common Questions About Growing Allium in Nevada
When can I plant Allium in Nevada?
Nevada's last spring hard freeze (28°F) clears between Apr 28 and May 20, and the first fall hard freeze lands between Oct 9 and Oct 21 (NOAA Regional Climate Centers ACIS, 1991-2020). Allium takes cold to about 23°F before a freeze kills it (FAO ECOCROP — the point where cold damages growing tissue, not a winter-survival floor), so plant on the early side of that window — even ahead of the final hard freeze.
What hardiness zone is Allium grown in across Nevada?
Nevada spans USDA hardiness zones 4a-10a (USDA ARS PHZM 2023). Allium carries a range of zones 4-8, so the overlap zones are where outdoor growing is most reliable.
How many frost-free days does a typical Nevada site have?
A typical Nevada site sees ~163 frost-free days per year (derived from NOAA Regional Climate Centers ACIS, 1991-2020). Allium needs 120+ frost-free days, so check whether your local microclimate runs above or below the state average before settling on a planting date.
How should I amend the soil for Allium in Nevada?
Allium tolerates pH 4.5-7.5 and well (dry spells) drainage (FAO ECOCROP). That is a 3-unit span, acid ground through alkaline, so pH is rarely what limits this plant on a Nevada site — amend for drainage and organic matter first.
Will Allium actually grow on my specific land in Nevada?
State-level zone + climate data is a sketch. A Growable Ground parcel report scores allium against your address's exact soil pH, drainage, sun, and frost-date data drawn from USDA SSURGO, NOAA, and PRISM — not state averages.
Check your specific parcel in Nevada
State-level data is a sketch. Your Growable Ground report scores allium against your parcel's exact soil, sun, drainage, and frost data — not zone averages.
Three things about your lot that Nevada allium averages can't show:
We read public map data around Nevada — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Nevada allium average
Explore More
Growing guides for allium
Explore Nevada county by county
Nevada carries 17 counties with their own USDA zone — a sample of the growing pages for allium there:
Where else allium grows
Allium's zone band crosses state lines — these are the states closest to Nevada in winter climate where it also has a page, plus the far ends of its range. Each one re-answers the question with that state's own record.
More to grow in Nevada
Nevada has a growing page for 1,041 plants — a rotating sample of the rest of the shelf.
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