Yes — Strong Match
phacelia (zones 2-11) covers every zone Nevada contains (4a-10a), so hardiness is not what limits it anywhere in the state.
Phacelia in Nevada — the short answer
Phacelia in Nevada: hardy in zones 2–11, full sun, against a state median of ~163 frost-free days.
- Plant zones
- 2-11
- 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
- Days to maturity
- 45 days
- Growable Ground Plant Database
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.
Phacelia is grown as an annual, so your winter zone isn't the deciding factor — your frost-free window is. A typical Nevada site runs ~163 frost-free days, but that is a state median, not your yard: slope, trees, and low spots move the last-frost date across a single parcel. Enter your address and we'll score phacelia against your land's actual frost dates, sun, and soil.
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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 phacelia 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
Even within Nevada's zones 4a-10a, county microclimates differ enough to change what thrives. These counties carry the closest zone match for phacelia (USDA PHZM 2023):
Zone Comparison
Phacelia Needs
- USDA Zones: 2-11
- Frost-Free Days: 100+
- Sun: Full Sun
- Mature size: 3 ft tall
- Picking window: ~30 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 2-11)
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 Phacelia 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
Phacelia takes cold down to about 18°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.
When to start the seed
Phacelia is direct-sown where it grows rather than started under cover, so there is no seed-tray head start to bank — Nevada's dates above are the whole calendar for it. That makes the last-freeze date the binding constraint, and a warmer pocket of your own yard is worth more to this crop than it is to a transplanted one.
Days to maturity vs. the window
At 45 days to maturity (Growable Ground Plant Database), counting from the last hard freeze it ripens with 97 days to spare even in Nevada's tightest freeze scenario — room for a later start or a second sowing.
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 phacelia survives winter here. Whether the season is long enough — and warm enough — is a different question.
Frost-free days
Phacelia wants 100+ frost-free days; a typical Nevada site sees ~163 (NOAA Regional Climate Centers ACIS, 1991-2020). That leaves comfortable headroom for succession planting.
Growing degree days
Phacelia needs ~1000 GDD (base 50°F) to ripen. The state median runs ~1725 GDD (from PRISM 1991-2020 climate normals), so Nevada's typical season clears that easily.
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
Phacelia likes near-neutral soil (pH 6.4-8.6). That's the common-ground band across Nevada's desert sand and caliche — a soil test confirms it for your site. It will grow across that whole span, but it does best between pH 6 and 7.5 — 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 Phacelia 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 phacelia — is covered on the Nevada growing guide.
Timing shifts within Nevada
Phacelia needs about 100 days of frost-free season to complete its cycle. Even Elko County — Nevada’s shortest season at 110 frost-free days — clears that by 10 days, so season length isn’t the constraint anywhere in Nevada. What varies is your own parcel.
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 phacelia about 63 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"). Phacelia's 100-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
Phacelia 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, phacelia 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.
Nevada Cooperative Extension
For Nevada-specific cultivar recommendations, planting calendars, and pest pressure for phacelia, the canonical source is University of Nevada, Reno Extension. Their fact sheets carry the local trial data we can't generalize across 50 states.
Is Phacelia native to Nevada?
Yes — the USDA PLANTS Database (accessed 2026-07-01) documents Phacelia as native to Nevada. Planting it supports the pollinators and wildlife that evolved alongside it.
Native-range data: USDA PLANTS Database state-distribution records, accessed 2026-07-01.
Common Questions About Growing Phacelia in Nevada
When can I plant Phacelia 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). Phacelia takes cold to about 18°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.
Can Phacelia mature before first frost in Nevada?
Yes — Phacelia matures in 45 days (Growable Ground Plant Database), and Nevada's dependable hard-freeze-free window runs 142 days (NOAA Regional Climate Centers ACIS, 1991-2020), leaving 97 days of margin. Plant once the last hard freeze has passed — two to three weeks later for anything tender — and it ripens ahead of the first fall freeze.
What hardiness zone is Phacelia grown in across Nevada?
Nevada spans USDA hardiness zones 4a-10a (USDA ARS PHZM 2023). Phacelia carries a range of zones 2-11, 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). Phacelia needs 100+ frost-free days, so check whether your local microclimate runs above or below the state average before settling on a planting date.
Is Phacelia native to Nevada?
Yes — the USDA PLANTS Database (accessed 2026-07-01) documents Phacelia as native to Nevada. Planting it supports the pollinators and wildlife that evolved alongside it.
How should I amend the soil for Phacelia in Nevada?
Phacelia prefers pH 6.4-8.6 and well (dry spells) drainage (USDA PLANTS). That sits in the common-ground band across Nevada soils — a 30-minute soil test from a local Extension lab confirms it for your specific site.
Will Phacelia actually grow on my specific land in Nevada?
State-level zone + climate data is a sketch. A Growable Ground parcel report scores phacelia 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 phacelia against your parcel's exact soil, sun, drainage, and frost data — not zone averages.
Three things about your lot that Nevada phacelia 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 phacelia average
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