Green Park, 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.
Growers here do well with cabbage, hazelnut, california poppy, and collard greens — with the usual caveat that any single yard's soil, sun, and drainage cast the deciding vote.
Even in Green Park, 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 Green Park 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 Green Park — soil, climate, flood, and parcel records. How we handle your address.
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Green Park — the short answer
Green Park, Missouri: USDA zone 7a, about 239 days between hard freezes, across 838 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 15
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~239
- NOAA 1991–2020 Climate Normals, 28°F — this town
- City area
- 838 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 Green Park's average, not your lot's — a low corner or a tree line moves it. Against Green Park's 239-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Green Park
Each reading below is measured for Green Park itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredGreen Park runs about 239 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
MeasuredGreen Park 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 Green Park is in
Green Park sits in the Interior River Valleys and Hills — EPA Level III, inside the wider Eastern Temperate Forests. That is read at Green Park's own centroid rather than borrowed from St. Louis County.
What Grows in Green Park
Every plant below cleared Green Park's own zone 7a and its 239-day season. Each card opens that plant's Missouri profile. How we score.
Is it too late to plant in Green Park?
Almost never — the real question is what to plant next. 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 15 — 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 Green Park
Survey cells within 31 miles of Green Park checked for spotted lanternfly, none carrying a detection — a surveyed negative, not an absence of looking. Nearest documented record 250 miles off. What to watch for.
What's on the federal record near Green Park
Closest first, within ~10 miles of Green Park. Listing isn't leaking, and distance isn't exposure.
- DISTRICT SUBSTATION #4Underground Storage Tanks · 800 ft
- SABRELINER CORPORATIONUnderground Storage Tanks · 1200 ft
- JOHN J SMITH MASONRY COUnderground Storage Tanks · 1800 ft
- BITRODE CORPORATIONBrownfields · 1900 ft
- SOUTHLAND IMPORTSUnderground Storage Tanks · 1900 ft
- FANTASY COACHWORKSUnderground Storage Tanks · 2000 ft
- MEHLVILLE FIRE STATION #5Underground Storage Tanks · 2100 ft
- DISALVO, INCUnderground Storage Tanks · 2100 ft
- SUNTRUP NISSAN VOLKSWAGENBrownfields · 2200 ft
- LEADER LINCOLN MERCURYUnderground Storage Tanks · 2300 ft
- DAVE MUNGENASTUnderground Storage Tanks · 2300 ft
- MISSOURI ELECTROCHEM INCORPORATEDToxics Release Inventory · 2500 ft
6 more sites are on the record inside the same radius. See them on the map
Measured from Green Park'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 Green Park.
Sources Checked
within ~10 miles of Green Park
Severity Distribution
within ~10 miles of Green Park
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Green Park, Toxics Release Inventory runs higher than the national average — 207 sites within ~10 miles of Green Park. 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 Green Park
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 Green Park average
Your land is one point inside Green Park
Everything above resolves to Green Park as a whole — one PHZM band and one 28°F frost record, read across 838 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 Green Park Average
Green Park Average
- ●USDA Zones 7a, averaged across Green Park
- ●One soil character for all of Green Park
- ●Frost dates read at Green Park's scale: Mar 21 to Nov 15
YOUR Parcel
- ✓Your exact zone, not Green Park's 7a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Green Park
Pull a site-specific report for your exact address in Green Park, Missouri — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Green Park averages can't show:
We read public map data around Green Park — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Green Park average
How we know this about Green Park
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 Green Park’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 Green Park
When does frost risk typically end in Green Park?
The last hard freeze (28°F) in Green Park 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 Green Park?
The first hard freeze (28°F) in Green Park typically arrives around Nov 15, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Nov 1, so the watching starts about Oct 16 — about 239 days after the spring freeze cleared.
How long is the growing season in Green Park?
Measured between 28°F hard freezes, Green Park sees about 239 frost-free days — roughly Mar 21 through Nov 15, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Apr 11 to Nov 1, about 204 days.
Is the soil safe to grow vegetables in Green Park?
The federal record around Green Park runs heavier than most — 2,853 documented sites, mostly Underground Storage Tanks entries (1,662), the nearest Underground Storage Tanks record about 0.1 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 Green Park?
From about Oct 16 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 15 (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 15. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Green Park's scale — its 7a band and its 239-day season. Your yard writes its own version of Green Park'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 Green Park’s own scale
7 of the readings below were taken at Green Park's own scale — its own ~239-day season between 28°F freezes, the 838 acres it covers and 2,853 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Green Park's own USDA hardiness band, zones 7aUSDA PHZM 2023
- Green Park's own 28°F hard-freeze dates, about Mar 21 and Nov 15 and the ~239-day span between themNOAA 1991–2020 Climate Normals
- 2,853 documented contamination sites on the federal record near Green Park, the closest Underground Storage Tanks record about 0.1 miles out from the town centreFederal environmental registers
- Green Park's boundary and the 838 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 7a and a ~239-day seasonGrowable Ground crop-matching engine
- The ecoregion at Green Park's own centroid, the Interior River Valleys and HillsUS EPA Level III Ecoregions
- Lanternfly survey cells around Green Park 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 Green Park's 838 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 Green Park's 838 acreswhy one lot differs from the next →
- Which side of Green Park you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 838 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 Green Park-wide figureread your own land →
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