Glendo, Wyoming, sits in USDA hardiness zone 5a — enough range to grow cool-season vegetables, hardy fruit, and warm-season crops that mature before the first hard frost.
Growers here do well with cabbage, cranberry, lavender, and collard greens — with the usual caveat that any single yard's soil, sun, and drainage cast the deciding vote.
Even in Glendo, 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 Glendo 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 Glendo — soil, climate, flood, and parcel records. How we handle your address.
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Glendo — the short answer
Glendo, Wyoming: USDA zone 5a, about 148 days between hard freezes, across 378 acres of town.
- USDA zone
- 5a
- USDA PHZM 2023
- Last hard freeze (28°F)
- May 7
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Oct 2
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~148
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Town area
- 378 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 5a is Glendo's average, not your lot's — a low corner or a tree line moves it. Against Glendo's 148-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Glendo
Each reading below is measured for Glendo itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredGlendo runs about 148 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
MeasuredGlendo sits in USDA hardiness zone 5a.
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 Glendo is in
Glendo sits in the Northwestern Great Plains — EPA Level III, inside the wider Great Plains. That is read at Glendo's own centroid, and it is not what its county reads: Platte County is mostly High Plains. The wider page above you is answering a different question about different ground.
What Grows in Glendo
Every plant below cleared Glendo's own zone 5a and its 148-day season. Each card opens that plant's Wyoming profile. How we score.
Is it too late to plant in Glendo?
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 9; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near May 7 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Oct 2 — 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 Glendo
Closest first, within ~10 miles of Glendo. Listing isn't leaking, and distance isn't exposure.
- Jay Em HardwareUnderground Storage Tanks · 700 ft
- Glendo Dam and PowerplantUnderground Storage Tanks · 700 ft
- Glendo SchoolUnderground Storage Tanks · 750 ft
- Howards General Store, Inc.Underground Storage Tanks · 900 ft
- BELLWOOD BEATSBrownfields · 1200 ft
- Glendo Volunteer Ambulance ServiceUnderground Storage Tanks · 1200 ft
- Old Texaco StationUnderground Storage Tanks · 1700 ft
- Wildcat Post and PoleUnderground Storage Tanks · 2500 ft
- US BUREAU OF RECLAMATIONBrownfields · 0.5 mi
- 29-068-20aca01Nitrate · 2.2 mi
- 29-068-23ccc02Nitrate · 3.4 mi
- Rooch's MarinaUnderground Storage Tanks · 3.6 mi
3 more sites are on the record inside the same radius. See them on the map
Measured from Glendo'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 Glendo.
Severity Distribution
within ~10 miles of Glendo
Highest-Severity Sites
Know Before You Grow
- •On a private well, test for nitrates: above 10 mg/L the water needs treatment before irrigating.
- •Underground tanks leak petroleum as they age — near a former filling station, test the soil.
- •Near a brownfield, raised beds of imported soil give your food clean ground.
Check your specific parcel in Glendo
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 Glendo average
Your land is one point inside Glendo
Everything above resolves to Glendo as a whole — one PHZM band and one 28°F frost record, read across 378 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 Glendo Average
Glendo Average
- ●USDA Zones 5a, averaged across Glendo
- ●One soil character for all of Glendo
- ●Frost dates read at Glendo's scale: May 7 to Oct 2
YOUR Parcel
- ✓Your exact zone, not Glendo's 5a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Glendo
Pull a site-specific report for your exact address in Glendo, Wyoming — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Glendo averages can't show:
We read public map data around Glendo — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Glendo average
How we know this about Glendo
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 Glendo’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 Glendo
When does frost risk typically end in Glendo?
The last hard freeze (28°F) in Glendo typically lands around May 7, 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 May 28.
When is the first frost in Glendo?
The first hard freeze (28°F) in Glendo typically arrives around Oct 2, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Sep 18, so the watching starts about Sep 2 — about 148 days after the spring freeze cleared.
How long is the growing season in Glendo?
Measured between 28°F hard freezes, Glendo sees about 148 frost-free days — roughly May 7 through Oct 2, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer May 28 to Sep 18, about 113 days.
Is the soil safe to grow vegetables in Glendo?
The federal record around Glendo is light — 22 documented sites across the 9 federal source types we checked, mostly Nitrate entries (10), the nearest Underground Storage Tanks record about 0.1 miles out — and proximity to a documented site is information, not a diagnosis of any one yard. Growing food here starts from a strong position; a soil test before new food beds settles any site-specific question.
How do gardeners stretch the season in Glendo?
With about 148 frost-free days between hard freezes, Glendo 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 176 to 204 days — and cold frames or low tunnels buy more. Starting transplants indoors ahead of the May 7 hard-freeze normal stretches the season without touching the calendar.
Everything above is measured at Glendo's scale — its 5a band and its 148-day season. Your yard writes its own version of Glendo'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 Glendo’s own scale
6 of the readings below were taken at Glendo's own scale — its own ~148-day season between 28°F freezes, the 378 acres it covers and 22 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Glendo's own USDA hardiness band, zones 5aUSDA PHZM 2023
- Glendo's own 28°F hard-freeze dates, about May 7 and Oct 2 and the ~148-day span between themNOAA 1991–2020 Climate Normals
- 22 documented contamination sites on the federal record near Glendo, the closest Underground Storage Tanks record about 0.1 miles out from the town centreFederal environmental registers
- Glendo's boundary and the 378 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 5a and a ~148-day seasonGrowable Ground crop-matching engine
- Glendo sits in the Northwestern Great Plains — not the ecoregion its county mostly readsUS EPA Level III Ecoregions
Inherited from a wider read
- Soil character — no town-scale survey exists, so Glendo's 378 acres read through its county's SSURGO summaryfrom Platte County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Platte County
- The growing challenges every Wyoming grower plans around — written at state scale, so they stay on the state guidefrom Wyoming
- Butterfly and beetle records, and the farmland pesticide estimate — all published county-widefrom Platte County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Glendo's 378 acreswhy one lot differs from the next →
- Which side of Glendo you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 378 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Underground Storage Tanks record about 0.1 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 Glendo-wide figureread your own land →
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