Glenbrook, Nevada, sits in USDA hardiness zone 7a — enough range to grow cool-season vegetables, hardy fruit, and warm-season crops that mature before the first hard frost.
Among the crops suited to this profile: cabbage, blackberry, california poppy, and collard greens. The site-level story — soil, sun, drainage — decides the rest.
Even in Glenbrook, 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 Glenbrook 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 Glenbrook — soil, climate, flood, and parcel records. How we handle your address.
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Glenbrook — the short answer
Glenbrook, Nevada: USDA zone 7a, about 142 days between hard freezes, across 2K acres of town.
- USDA zone
- 7a
- USDA PHZM 2023
- Last hard freeze (28°F)
- May 24
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Oct 13
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~142
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Town area
- 2K 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 7a is Glenbrook's average, not your lot's — a low corner or a tree line moves it. Against Glenbrook's 142-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Glenbrook
Each reading below is measured for Glenbrook itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredGlenbrook runs about 142 days between hard freezes — a short growing season.
Long-maturing crops like melons, sweet potatoes, and winter squash can run out of runway before the first hard freeze, ripening late or not at all.
Lead with fast-maturing varieties, and stretch the season on both ends with cold frames, low tunnels, or a greenhouse.
NOAA 1991–2020 Climate Normals
Winter hardiness
MeasuredGlenbrook sits in USDA hardiness zone 7a.
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 Glenbrook is in
Glenbrook sits in the Sierra Nevada — EPA Level III, inside the wider Northwestern Forested Mountains. That is read at Glenbrook's own centroid, and it is not what its county reads: Douglas County is mostly Central Basin and Range. The wider page above you is answering a different question about different ground.
What Grows in Glenbrook
Every plant below cleared Glenbrook's own zone 7a and its 142-day season. Each card opens that plant's Nevada profile. How we score.
Is it too late to plant in Glenbrook?
For most of the year, no — what changes is which crops still fit the days remaining. Cool-season crops can go in from around Apr 26; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near May 24 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Oct 13 — long-season crops need about 90 days of runway, quick greens only 30. Short seasons reward decisiveness — quick-maturing varieties late, hardy greens under cover, and next year’s garlic in the ground before it closes.
What's on the federal record near Glenbrook
Closest first, within ~10 miles of Glenbrook. Listing isn't leaking, and distance isn't exposure.
- 090 N14 E18 10ADA 1 Glenbrook Well 3Nitrate · 0.7 mi
- 090 N14 E18 10ADB 1 Glenbrook Well 1Nitrate · 0.8 mi
- 090 N14 E18 10ABD 1 Glenbrook Well 2Nitrate · 0.8 mi
- NDOT-Spooner-ClosedUnderground Storage Tanks · 0.9 mi
- 090 N14 E18 12BAAA1 SPOONER FOREST SERVICENitrate · 1.0 mi
- 090 N14 E18 03CDA 1Nitrate · 1.0 mi
- Glenbrook CoUnderground Storage Tanks · 1.1 mi
- 090 N14 E18 03ABB 1 Glenbrook Well 4Nitrate · 1.2 mi
- UPPAWAY WATER STORAGE TANKBrownfields · 1.6 mi
- Whispering Pines *farm Tank*Underground Storage Tanks · 1.8 mi
- 090 N15 E18 27DCC 2 Skunk 2Nitrate · 2.1 mi
- 090 N15 E18 27DCC 1 Skunk 1Nitrate · 2.2 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Glenbrook'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 Glenbrook.
Total Sites
611
within ~10 miles of Glenbrook
Risk Level
Elevated
Highest-severity
4 Superfund sites (none NPL-listed)
Sources Checked
within ~10 miles of Glenbrook
Severity Distribution
within ~10 miles of Glenbrook
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Glenbrook, Nitrate runs higher than the national average — 364 sites within ~10 miles of Glenbrook. That's not a problem with your land — it's information about it.
Nitrate: Nitrate contamination primarily comes from agricultural fertilizer runoff and failing septic systems.
Test well water for nitrate if you rely on a private well for irrigation (EPA standard: 10 mg/L).
Check your specific parcel in Glenbrook
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 Glenbrook average
Your land is one point inside Glenbrook
Everything above resolves to Glenbrook as a whole — one PHZM band and one 28°F frost record, read across 2K 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 Glenbrook Average
Glenbrook Average
- ●USDA Zones 7a, averaged across Glenbrook
- ●One soil character for all of Glenbrook
- ●Frost dates read at Glenbrook's scale: May 24 to Oct 13
YOUR Parcel
- ✓Your exact zone, not Glenbrook's 7a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Glenbrook
Pull a site-specific report for your exact address in Glenbrook, Nevada — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Glenbrook averages can't show:
We read public map data around Glenbrook — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Glenbrook average
How we know this about Glenbrook
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 Glenbrook’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 Glenbrook
When does frost risk typically end in Glenbrook?
The last hard freeze (28°F) in Glenbrook typically lands around May 24, 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 Jun 14.
When is the first frost in Glenbrook?
The first hard freeze (28°F) in Glenbrook typically arrives around Oct 13, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Sep 29, so the watching starts about Sep 13 — about 142 days after the spring freeze cleared.
How long is the growing season in Glenbrook?
Measured between 28°F hard freezes, Glenbrook sees about 142 frost-free days — roughly May 24 through Oct 13, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Jun 14 to Sep 29, about 107 days.
Is the soil safe to grow vegetables in Glenbrook?
The federal record around Glenbrook is a meaningful one — 611 documented sites, mostly Nitrate entries (364), the nearest Nitrate record about 0.7 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 gardeners stretch the season in Glenbrook?
With about 142 frost-free days between hard freezes, Glenbrook rewards the classic extension moves: floating row cover buys roughly two to four extra weeks at each shoulder — on this season that is a working window nearer 170 to 198 days — and cold frames or low tunnels buy more. Starting transplants indoors ahead of the May 24 hard-freeze normal stretches the season without touching the calendar.
Everything above is measured at Glenbrook's scale — its 7a band and its 142-day season. Your yard writes its own version of Glenbrook'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 Glenbrook’s own scale
6 of the readings below were taken at Glenbrook's own scale — its own ~142-day season between 28°F freezes, the 2,426 acres it covers and 611 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Glenbrook's own USDA hardiness band, zones 7aUSDA PHZM 2023
- Glenbrook's own 28°F hard-freeze dates, about May 24 and Oct 13 and the ~142-day span between themNOAA 1991–2020 Climate Normals
- 611 documented contamination sites on the federal record near Glenbrook, the closest Nitrate record about 0.7 miles out from the town centreFederal environmental registers
- Glenbrook's boundary and the 2,426 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 7a and a ~142-day seasonGrowable Ground crop-matching engine
- Glenbrook sits in the Sierra Nevada — not the ecoregion its county mostly readsUS EPA Level III Ecoregions
Inherited from a wider read
- Soil character — no town-scale survey exists, so Glenbrook's 2,426 acres read through its county's SSURGO summaryfrom Douglas County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Douglas 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 Douglas County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Glenbrook's 2,426 acreswhy one lot differs from the next →
- Which side of Glenbrook you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 2,426 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Nitrate record about 0.7 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 Glenbrook-wide figureread your own land →
More in Nevada
Wider growing context
What grows across NevadaGlenbrook sits outside our named growing regions, so Nevada as a whole is its closest context here.
Nearby growing guides