Flordell Hills, 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.
Well-matched crops include cabbage, hazelnut, california poppy, and collard greens, and the gap between "grows in the area" and "grows in your yard" is closed by soil, sun, and drainage.
Even in Flordell Hills, 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 Flordell Hills 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 Flordell Hills — soil, climate, flood, and parcel records. How we handle your address.
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Flordell Hills — the short answer
Flordell Hills, Missouri: USDA zone 7a, about 244 days between hard freezes, across 79 acres of city.
- USDA zone
- 7a
- USDA PHZM 2023
- Last hard freeze (28°F)
- Mar 20
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Nov 19
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~244
- NOAA 1991–2020 Climate Normals, 28°F — this town
- City area
- 79 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 Flordell Hills's average, not your lot's — a low corner or a tree line moves it. Against Flordell Hills's 244-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Flordell Hills
Each reading below is measured for Flordell Hills itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredFlordell Hills runs about 244 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
MeasuredFlordell Hills 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 Flordell Hills is in
Flordell Hills sits in the Interior River Valleys and Hills — EPA Level III, inside the wider Eastern Temperate Forests. That is read at Flordell Hills's own centroid rather than borrowed from St. Louis County.
What Grows in Flordell Hills
Every plant below cleared Flordell Hills's own zone 7a and its 244-day season. Each card opens that plant's Missouri profile. How we score.
Is it too late to plant in Flordell Hills?
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 20; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Mar 20 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Nov 19 — long-season crops need about 90 days of runway, quick greens only 30. With a season this long, “too late” mostly means “switch crops” — second sowings and a full fall garden are the norm, with garlic closing the year.
Documented around Flordell Hills
Survey cells within 31 miles of Flordell Hills checked for spotted lanternfly, none carrying a detection — a surveyed negative, not an absence of looking. Nearest documented record 237 miles off. What to watch for.
What's on the federal record near Flordell Hills
Closest first, within ~10 miles of Flordell Hills. Listing isn't leaking, and distance isn't exposure.
- WALLIS PETROLEUM, L.C. #9046Underground Storage Tanks · 850 ft
- CROWN MART 17Underground Storage Tanks · 1100 ft
- CITY OF JENNINGS FIRE DEPTUnderground Storage Tanks · 1300 ft
- BRECKENRIDGE MATERIAL COMPANYUnderground Storage Tanks · 1700 ft
- RUSTMAN BUS CO INC - STATION CLOSEDUnderground Storage Tanks · 1800 ft
- FORMER RYANS AUTO REPAIRUnderground Storage Tanks · 2100 ft
- CITY OF JENNINGS MAINTENANCE DEPTUnderground Storage Tanks · 2200 ft
- FORMER SUN SERVICE CENTERUnderground Storage Tanks · 2400 ft
- CITY OF JENNINGS - POLICE DEPARTMENUnderground Storage Tanks · 2400 ft
- SHONEYS INCUnderground Storage Tanks · 2500 ft
- FAMILY DOLLAR # 6945Brownfields · 2600 ft
- SINCLAIR RETAIL STATION #24050Underground Storage Tanks · 2600 ft
6 more sites are on the record inside the same radius. See them on the map
Measured from Flordell Hills'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 Flordell Hills.
Sources Checked
within ~10 miles of Flordell Hills
Severity Distribution
within ~10 miles of Flordell Hills
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Flordell Hills, two things run higher than the national average within ~10 miles of Flordell Hills — Superfund (71 sites) and Toxics Release Inventory (339 sites). It's not cause for alarm — it's worth knowing, and there's a sensible way to grow around it.
Superfund: Superfund sites represent the most severe contamination in the federal system.
Toxics Release Inventory: TRI facilities report annual chemical releases to air, water, and land.
Commission professional soil testing before any food production (test for heavy metals, VOCs, and SVOCs).
Check prevailing wind direction — downwind parcels face higher exposure than upwind or crosswind locations.
Check your specific parcel in Flordell Hills
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 Flordell Hills average
Your land is one point inside Flordell Hills
Everything above resolves to Flordell Hills as a whole — one PHZM band and one 28°F frost record, read across 79 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 Flordell Hills Average
Flordell Hills Average
- ●USDA Zones 7a, averaged across Flordell Hills
- ●One soil character for all of Flordell Hills
- ●Frost dates read at Flordell Hills's scale: Mar 20 to Nov 19
YOUR Parcel
- ✓Your exact zone, not Flordell Hills's 7a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Flordell Hills
Pull a site-specific report for your exact address in Flordell Hills, Missouri — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Flordell Hills averages can't show:
We read public map data around Flordell Hills — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Flordell Hills average
How we know this about Flordell Hills
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 Flordell Hills’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 Flordell Hills
When does frost risk typically end in Flordell Hills?
The last hard freeze (28°F) in Flordell Hills typically lands around Mar 20, 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 10.
When is the first frost in Flordell Hills?
The first hard freeze (28°F) in Flordell Hills typically arrives around Nov 19, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Nov 5, so the watching starts about Oct 20 — about 244 days after the spring freeze cleared.
How long is the growing season in Flordell Hills?
Measured between 28°F hard freezes, Flordell Hills sees about 244 frost-free days — roughly Mar 20 through Nov 19, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Apr 10 to Nov 5, about 209 days.
Is the soil safe to grow vegetables in Flordell Hills?
The federal record around Flordell Hills runs heavier than most — 4,252 documented sites, mostly Underground Storage Tanks entries (2,601), the nearest Underground Storage Tanks record about 0.2 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 Flordell Hills?
From about Oct 20 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 19 (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 19. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Flordell Hills's scale — its 7a band and its 244-day season. Your yard writes its own version of Flordell Hills'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 Flordell Hills’s own scale
7 of the readings below were taken at Flordell Hills's own scale — its own ~244-day season between 28°F freezes, the 79 acres it covers and 4,252 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Flordell Hills's own USDA hardiness band, zones 7aUSDA PHZM 2023
- Flordell Hills's own 28°F hard-freeze dates, about Mar 20 and Nov 19 and the ~244-day span between themNOAA 1991–2020 Climate Normals
- 4,252 documented contamination sites on the federal record near Flordell Hills, the closest Underground Storage Tanks record about 0.2 miles out from the town centreFederal environmental registers
- Flordell Hills's boundary and the 79 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 7a and a ~244-day seasonGrowable Ground crop-matching engine
- The ecoregion at Flordell Hills's own centroid, the Interior River Valleys and HillsUS EPA Level III Ecoregions
- Lanternfly survey cells around Flordell Hills 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 Flordell Hills's 79 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 Flordell Hills's 79 acreswhy one lot differs from the next →
- Which side of Flordell Hills you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 79 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Underground Storage Tanks 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 Flordell Hills-wide figureread your own land →
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