Edmundson, Missouri, 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.
The conditions favor cabbage, hazelnut, california poppy, and collard greens, among others — though every individual site edits that list with its own soil, sun, and drainage.
Even in Edmundson, 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 Edmundson 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 Edmundson — soil, climate, flood, and parcel records. How we handle your address.
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Edmundson — the short answer
Edmundson, Missouri: USDA zone 7a, about 242 days between hard freezes, across 175 acres of city.
- USDA zone
- 7a
- USDA PHZM 2023
- Last hard freeze (28°F)
- Mar 21
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Nov 18
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~242
- NOAA 1991–2020 Climate Normals, 28°F — this town
- City area
- 175 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 Edmundson's average, not your lot's — a low corner or a tree line moves it. Against Edmundson's 242-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Edmundson
Each reading below is measured for Edmundson itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredEdmundson runs about 242 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
MeasuredEdmundson 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 Edmundson is in
Edmundson sits in the Interior River Valleys and Hills — EPA Level III, inside the wider Eastern Temperate Forests. That is read at Edmundson's own centroid rather than borrowed from St. Louis County.
What Grows in Edmundson
Every plant below cleared Edmundson's own zone 7a and its 242-day season. Each card opens that plant's Missouri profile. How we score.
Is it too late to plant in Edmundson?
Rarely: the season closes in stages, not all at once, and each stage has its crops. Cool-season crops can go in from around Feb 21; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Mar 21 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Nov 18 — long-season crops need about 90 days of runway, quick greens only 30. There is slack in a calendar like this — late plantings, second rounds of favorites, and a fall bench that keeps beds working.
Documented around Edmundson
Survey cells within 31 miles of Edmundson checked for spotted lanternfly, none carrying a detection — a surveyed negative, not an absence of looking. Nearest documented record 239 miles off. What to watch for.
What's on the federal record near Edmundson
Closest first, within ~10 miles of Edmundson. Listing isn't leaking, and distance isn't exposure.
- PARK N FLYBrownfields · 800 ft
- THE PARKING SPOTUnderground Storage Tanks · 850 ft
- BP 365Underground Storage Tanks · 1100 ft
- BUDGET RENT A CAR OF ST LOUIS INCUnderground Storage Tanks · 1100 ft
- FINAUnderground Storage Tanks · 1100 ft
- TPS PARKING LAMBERT LLCBrownfields · 1100 ft
- MARRIOTT HOTELUnderground Storage Tanks · 1200 ft
- AVIS RENT A CAR SYSTEM INCUnderground Storage Tanks · 1300 ft
- FORMER AMERICAN INTERNAT RENT-A-CARUnderground Storage Tanks · 1600 ft
- ST LOUIS HILTONUnderground Storage Tanks · 1700 ft
- ENTERPRISE LEASING COMPANYUnderground Storage Tanks · 1700 ft
- NEXT DAY MOTOR FREIGHT INCUnderground Storage Tanks · 1700 ft
6 more sites are on the record inside the same radius. See them on the map
Measured from Edmundson'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 Edmundson.
Sources Checked
within ~10 miles of Edmundson
Severity Distribution
within ~10 miles of Edmundson
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Edmundson, Toxics Release Inventory runs higher than the national average — 244 sites within ~10 miles of Edmundson. It's not cause for alarm — it's worth knowing, and there's a sensible way to grow around 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 Edmundson
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 Edmundson average
Your land is one point inside Edmundson
Everything above resolves to Edmundson as a whole — one PHZM band and one 28°F frost record, read across 175 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 Edmundson Average
Edmundson Average
- ●USDA Zones 7a, averaged across Edmundson
- ●One soil character for all of Edmundson
- ●Frost dates read at Edmundson's scale: Mar 21 to Nov 18
YOUR Parcel
- ✓Your exact zone, not Edmundson's 7a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Edmundson
Pull a site-specific report for your exact address in Edmundson, Missouri — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Edmundson averages can't show:
We read public map data around Edmundson — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Edmundson average
How we know this about Edmundson
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 Edmundson’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 Edmundson
When does frost risk typically end in Edmundson?
The last hard freeze (28°F) in Edmundson typically lands around Mar 21, 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 11.
When is the first frost in Edmundson?
The first hard freeze (28°F) in Edmundson typically arrives around Nov 18, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Nov 4, so the watching starts about Oct 19 — about 242 days after the spring freeze cleared.
How long is the growing season in Edmundson?
Measured between 28°F hard freezes, Edmundson sees about 242 frost-free days — roughly Mar 21 through Nov 18, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Apr 11 to Nov 4, about 207 days.
Is the soil safe to grow vegetables in Edmundson?
The federal record around Edmundson is a meaningful one — 3,332 documented sites, mostly Underground Storage Tanks entries (2,012), the nearest Brownfields record about 0.2 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 I protect my plants from frost in Edmundson?
From about Oct 19 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 18 (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 18. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Edmundson's scale — its 7a band and its 242-day season. Your yard writes its own version of Edmundson'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 Edmundson’s own scale
7 of the readings below were taken at Edmundson's own scale — its own ~242-day season between 28°F freezes, the 175 acres it covers and 3,332 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Edmundson's own USDA hardiness band, zones 7aUSDA PHZM 2023
- Edmundson's own 28°F hard-freeze dates, about Mar 21 and Nov 18 and the ~242-day span between themNOAA 1991–2020 Climate Normals
- 3,332 documented contamination sites on the federal record near Edmundson, the closest Brownfields record about 0.2 miles out from the town centreFederal environmental registers
- Edmundson's boundary and the 175 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 7a and a ~242-day seasonGrowable Ground crop-matching engine
- The ecoregion at Edmundson's own centroid, the Interior River Valleys and HillsUS EPA Level III Ecoregions
- Lanternfly survey cells around Edmundson checked, none carrying a detectionlydemapr (De Bona & Helmus), 10 km survey lattice
Inherited from a wider read
- Soil character — no town-scale survey exists, so Edmundson's 175 acres read through its county's SSURGO summaryfrom St. Louis County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom St. Louis 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 St. Louis County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Edmundson's 175 acreswhy one lot differs from the next →
- Which side of Edmundson you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 175 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Brownfields record about 0.2 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 Edmundson-wide figureread your own land →
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