New Melle, Missouri, sits in USDA hardiness zone 6b — a range where zone-matched perennials and frost-aware annual timing set what succeeds.
Among the crops suited to this profile: cabbage, hazelnut, lavender, and collard greens. The site-level story — soil, sun, drainage — decides the rest.
Even in New Melle, 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 New Melle 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 New Melle — soil, climate, flood, and parcel records. How we handle your address.
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New Melle — the short answer
New Melle, Missouri: USDA zone 6b, about 227 days between hard freezes, across 1K acres of city.
- USDA zone
- 6b
- USDA PHZM 2023
- Last hard freeze (28°F)
- Mar 25
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Nov 7
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~227
- NOAA 1991–2020 Climate Normals, 28°F — this town
- City area
- 1K 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 New Melle's average, not your lot's — a low corner or a tree line moves it. Against New Melle's 227-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in New Melle
Each reading below is measured for New Melle itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredNew Melle runs about 227 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
MeasuredNew Melle 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 New Melle is in
New Melle sits in the Interior River Valleys and Hills — EPA Level III, inside the wider Eastern Temperate Forests. That is read at New Melle's own centroid rather than borrowed from St. Charles County.
What Grows in New Melle
Every plant below cleared New Melle's own zone 6b and its 227-day season. Each card opens that plant's Missouri profile. How we score.
Is it too late to plant in New Melle?
Almost never — the real question is what to plant next. Cool-season crops can go in from around Feb 25; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Mar 25 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Nov 7 — 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 New Melle
Survey cells within 31 miles of New Melle checked for spotted lanternfly, none carrying a detection — a surveyed negative, not an absence of looking. Nearest documented record 256 miles off. What to watch for.
What's on the federal record near New Melle
Closest first, within ~10 miles of New Melle. Listing isn't leaking, and distance isn't exposure.
- NEW MELLE-C.O.Underground Storage Tanks · 0.6 mi
- BLAIR FEED & GRAIN, INCUnderground Storage Tanks · 0.6 mi
- NEW MELLE TEXACOUnderground Storage Tanks · 0.6 mi
- T46N R01E 26CCD1Nitrate · 0.6 mi
- SHORT STOP 66Underground Storage Tanks · 0.6 mi
- WENTZVILLEUnderground Storage Tanks · 0.7 mi
- NEW MELLE MAINTENANCE SHED (NEW NA)Underground Storage Tanks · 1.1 mi
- T46N R01E 15CDB1Nitrate · 1.9 mi
- ST CHARLES CO HWY DEPRTMTBrownfields · 2.1 mi
- FRED WEBER INC-NEW MELLE QUARRYBrownfields · 2.9 mi
- JOSEPH W. & PATRICIA B. ISTWANUnderground Storage Tanks · 3.1 mi
- GREENVIEW MATERIALSToxics Release Inventory · 3.5 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from New Melle'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 New Melle.
Sources Checked
within ~10 miles of New Melle
Severity Distribution
within ~10 miles of New Melle
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around New Melle, Nitrate runs higher than the national average — 224 sites within ~10 miles of New Melle. It's not cause for alarm — it's worth knowing, and there's a sensible way to grow around it.
Nitrate: Nitrate contamination primarily comes from agricultural fertilizer runoff and failing septic systems.
Test well water for nitrate if you rely on a private well for irrigation (EPA standard: 10 mg/L).
Check your specific parcel in New Melle
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 New Melle average
Your land is one point inside New Melle
Everything above resolves to New Melle as a whole — one PHZM band and one 28°F frost record, read across 1K 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 New Melle Average
New Melle Average
- ●USDA Zones 6b, averaged across New Melle
- ●One soil character for all of New Melle
- ●Frost dates read at New Melle's scale: Mar 25 to Nov 7
YOUR Parcel
- ✓Your exact zone, not New Melle's 6b
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in New Melle
Pull a site-specific report for your exact address in New Melle, Missouri — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that New Melle averages can't show:
We read public map data around New Melle — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the New Melle average
How we know this about New Melle
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 New Melle’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 New Melle
When does frost risk typically end in New Melle?
The last hard freeze (28°F) in New Melle typically lands around Mar 25, 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 15.
When is the first frost in New Melle?
The first hard freeze (28°F) in New Melle typically arrives around Nov 7, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Oct 24, so the watching starts about Oct 8 — about 227 days after the spring freeze cleared.
How long is the growing season in New Melle?
Measured between 28°F hard freezes, New Melle sees about 227 frost-free days — roughly Mar 25 through Nov 7, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Apr 15 to Oct 24, about 192 days.
Is the soil safe to grow vegetables in New Melle?
The federal record around New Melle is a meaningful one — 471 documented sites, mostly Nitrate entries (224), the nearest Underground Storage Tanks record about 0.6 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 New Melle?
From about Oct 8 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 7 (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 7. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at New Melle's scale — its 6b band and its 227-day season. Your yard writes its own version of New Melle'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 New Melle’s own scale
7 of the readings below were taken at New Melle's own scale — its own ~227-day season between 28°F freezes, the 1,082 acres it covers and 471 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- New Melle's own USDA hardiness band, zones 6bUSDA PHZM 2023
- New Melle's own 28°F hard-freeze dates, about Mar 25 and Nov 7 and the ~227-day span between themNOAA 1991–2020 Climate Normals
- 471 documented contamination sites on the federal record near New Melle, the closest Underground Storage Tanks record about 0.6 miles out from the town centreFederal environmental registers
- New Melle's boundary and the 1,082 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 6b and a ~227-day seasonGrowable Ground crop-matching engine
- The ecoregion at New Melle's own centroid, the Interior River Valleys and HillsUS EPA Level III Ecoregions
- Lanternfly survey cells around New Melle 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 New Melle's 1,082 acres read through its county's SSURGO summaryfrom St. Charles County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom St. Charles 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. Charles County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among New Melle's 1,082 acreswhy one lot differs from the next →
- Which side of New Melle you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 1,082 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Underground Storage Tanks record about 0.6 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 New Melle-wide figureread your own land →
More in Missouri
Wider growing context
What grows across MissouriNew Melle sits outside our named growing regions, so Missouri as a whole is its closest context here.
Nearby growing guides