Glenaire, Missouri, sits in USDA hardiness zone 6b — room for a real mix of vegetables, fruit, and perennials matched to the local frost calendar.
The conditions favor cabbage, hazelnut, lavender, and collard greens, among others — though every individual site edits that list with its own soil, sun, and drainage.
Even in Glenaire, 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 Glenaire 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 Glenaire — soil, climate, flood, and parcel records. How we handle your address.
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Glenaire — the short answer
Glenaire, Missouri: USDA zone 6b, about 225 days between hard freezes, across 173 acres of city.
- USDA zone
- 6b
- USDA PHZM 2023
- Last hard freeze (28°F)
- Mar 29
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Nov 9
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~225
- NOAA 1991–2020 Climate Normals, 28°F — this town
- City area
- 173 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 6b is Glenaire's average, not your lot's — a low corner or a tree line moves it. Against Glenaire's 225-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Glenaire
Each reading below is measured for Glenaire itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredGlenaire runs about 225 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
MeasuredGlenaire sits in USDA hardiness zone 6b.
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 Glenaire is in
Glenaire sits in the Western Corn Belt Plains — EPA Level III, inside the wider Great Plains. That is read at Glenaire's own centroid rather than borrowed from Clay County.
What Grows in Glenaire
Every plant below cleared Glenaire's own zone 6b and its 225-day season. Each card opens that plant's Missouri profile. How we score.
Is it too late to plant in Glenaire?
Rarely: the season closes in stages, not all at once, and each stage has its crops. Cool-season crops can go in from around Mar 1; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Mar 29 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Nov 9 — long-season crops need about 90 days of runway, quick greens only 30. A long window like this one runs successions deep into fall — and even its last weeks take quick greens and garlic.
What's on the federal record near Glenaire
Closest first, within ~10 miles of Glenaire. Listing isn't leaking, and distance isn't exposure.
- AMAZON.COM SERVICES LLC MCI3Brownfields · 0.7 mi
- XPO INC CMKBrownfields · 0.7 mi
- CENTRAL POWER PRODUCTSUnderground Storage Tanks · 0.9 mi
- KAW SERVICES INCBrownfields · 0.9 mi
- PLEASANT VALLEY FUEL STOPUnderground Storage Tanks · 0.9 mi
- LIQUID TRANSPORT CORPORATIONBrownfields · 1.0 mi
- WALGREENS MICRO FULFILLMENT CENTER #21394Brownfields · 1.0 mi
- AMAZON.COM SERVICES LLC MCI9Brownfields · 1.0 mi
- US PETROLEUMUnderground Storage Tanks · 1.1 mi
- JAY TRUCK DRIVER TRAINING CENTERUnderground Storage Tanks · 1.2 mi
- VALLEY 1 STOPUnderground Storage Tanks · 1.2 mi
- MM-38 LIBERTYUnderground Storage Tanks · 1.4 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Glenaire'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 Glenaire.
Sources Checked
within ~10 miles of Glenaire
Severity Distribution
within ~10 miles of Glenaire
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Glenaire, Toxics Release Inventory runs higher than the national average — 138 sites within ~10 miles of Glenaire. That's not a problem with your land — it's information about it.
Toxics Release Inventory: TRI facilities report annual chemical releases to air, water, and land.
Check prevailing wind direction — downwind parcels face higher exposure than upwind or crosswind locations.
Check your specific parcel in Glenaire
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 Glenaire average
Your land is one point inside Glenaire
Everything above resolves to Glenaire as a whole — one PHZM band and one 28°F frost record, read across 173 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 city 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 Glenaire Average
Glenaire Average
- ●USDA Zones 6b, averaged across Glenaire
- ●One soil character for all of Glenaire
- ●Frost dates read at Glenaire's scale: Mar 29 to Nov 9
YOUR Parcel
- ✓Your exact zone, not Glenaire's 6b
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Glenaire
Pull a site-specific report for your exact address in Glenaire, Missouri — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Glenaire averages can't show:
We read public map data around Glenaire — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Glenaire average
How we know this about Glenaire
The datasets: hardiness from the USDA ARS Plant Hardiness Zone Map 2023, read at this city’s own centroid; hard-freeze dates from NOAA 1991–2020 28°F normals at Glenaire’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 city grain anywhere on this page — there is no city-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 Glenaire
When does frost risk typically end in Glenaire?
The last hard freeze (28°F) in Glenaire typically lands around Mar 29, 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 Apr 19.
When is the first frost in Glenaire?
The first hard freeze (28°F) in Glenaire typically arrives around Nov 9, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Oct 26, so the watching starts about Oct 10 — about 225 days after the spring freeze cleared.
How long is the growing season in Glenaire?
Measured between 28°F hard freezes, Glenaire sees about 225 frost-free days — roughly Mar 29 through Nov 9, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Apr 19 to Oct 26, about 190 days.
Is the soil safe to grow vegetables in Glenaire?
The federal record around Glenaire runs heavier than most — 1,436 documented sites, mostly Underground Storage Tanks entries (668), the nearest Brownfields record about 0.7 miles out — so test the soil before planting food in the ground, and raised beds with clean imported soil grow well in the meantime. Even here, proximity to a documented site is information, not a diagnosis of any one yard; the contamination map shows exactly what's recorded and where.
How do I protect my plants from frost in Glenaire?
From about Oct 10 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 9 (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 9. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Glenaire's scale — its 6b band and its 225-day season. Your yard writes its own version of Glenaire'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 Glenaire’s own scale
6 of the readings below were taken at Glenaire's own scale — its own ~225-day season between 28°F freezes, the 173 acres it covers and 1,436 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Glenaire's own USDA hardiness band, zones 6bUSDA PHZM 2023
- Glenaire's own 28°F hard-freeze dates, about Mar 29 and Nov 9 and the ~225-day span between themNOAA 1991–2020 Climate Normals
- 1,436 documented contamination sites on the federal record near Glenaire, the closest Brownfields record about 0.7 miles out from the town centreFederal environmental registers
- Glenaire's boundary and the 173 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 6b and a ~225-day seasonGrowable Ground crop-matching engine
- The ecoregion at Glenaire's own centroid, the Western Corn Belt PlainsUS EPA Level III Ecoregions
Inherited from a wider read
- Soil character — no town-scale survey exists, so Glenaire's 173 acres read through its county's SSURGO summaryfrom Clay County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Clay County
- The growing challenges every Missouri grower plans around — written at state scale, so they stay on the state guidefrom Missouri
- Butterfly and beetle records, and the farmland pesticide estimate — all published county-widefrom Clay County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Glenaire's 173 acreswhy one lot differs from the next →
- Which side of Glenaire you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 173 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Brownfields 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 Glenaire-wide figureread your own land →
More in Missouri
Wider growing context
What grows across MissouriGlenaire sits outside our named growing regions, so Missouri as a whole is its closest context here.
Nearby growing guides