Newburg, Missouri, sits in USDA hardiness zone 6a — a zone band wide enough that plant choice, not possibility, is the interesting question.
Expect cabbage, hazelnut, lavender, and collard greens to be strong candidates here; the deciding factors on any one parcel stay local — soil, sun, and drainage.
Even in Newburg, 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 Newburg 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 Newburg — soil, climate, flood, and parcel records. How we handle your address.
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Newburg — the short answer
Newburg, Missouri: USDA zone 6a, about 192 days between hard freezes, across 413 acres of city.
- USDA zone
- 6a
- USDA PHZM 2023
- Last hard freeze (28°F)
- Apr 9
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Oct 18
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~192
- NOAA 1991–2020 Climate Normals, 28°F — this town
- City area
- 413 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 6a is Newburg's average, not your lot's — a low corner or a tree line moves it. Against Newburg's 192-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Newburg
Each reading below is measured for Newburg itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredNewburg runs about 192 days between hard freezes — a moderate growing season.
There is room for the full run of cool-season crops plus a warm-season main crop, but the calendar is tight enough that a late spring or early fall frost still decides how much finishes.
Time warm-season transplants to your last hard freeze, and a few weeks of season extension turns a near-miss harvest into a sure one.
NOAA 1991–2020 Climate Normals
Winter hardiness
MeasuredNewburg sits in USDA hardiness zone 6a.
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 Newburg is in
Newburg sits in the Ozark Highlands — EPA Level III, inside the wider Eastern Temperate Forests. That is read at Newburg's own centroid rather than borrowed from Phelps County.
What Grows in Newburg
Every plant below cleared Newburg's own zone 6a and its 192-day season. Each card opens that plant's Missouri profile. How we score.
Is it too late to plant in Newburg?
Almost never — the real question is what to plant next. Cool-season crops can go in from around Mar 12; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Apr 9 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Oct 18 — long-season crops need about 90 days of runway, quick greens only 30. Even past midsummer there is room for a true fall garden here, and garlic planted near the close carries the momentum into next year.
Documented around Newburg
Survey cells within 31 miles of Newburg checked for spotted lanternfly, none carrying a detection — a surveyed negative, not an absence of looking. Nearest documented record 312 miles off. What to watch for.
What's on the federal record near Newburg
Closest first, within ~10 miles of Newburg. Listing isn't leaking, and distance isn't exposure.
- T37N R09W 22 1Nitrate · 600 ft
- NEWBURG R-II SCHOOL DISTRICTUnderground Storage Tanks · 1300 ft
- T37N R09W 15DDB1Nitrate · 0.6 mi
- UnkMining · 1.0 mi
- T37N R09W 21CBB1Nitrate · 1.7 mi
- T37N R09W 20ADNitrate · 1.9 mi
- ESTATE OF HENRY HICKMANUnderground Storage Tanks · 1.9 mi
- MALONE'S SERVICE STATIONUnderground Storage Tanks · 2.0 mi
- T37N R09W 11DAC1Nitrate · 2.0 mi
- T37N R09W 10ACA2Nitrate · 2.1 mi
- T37N R09W 10ACA1Nitrate · 2.1 mi
- OZARK OIL CO LLC BPUnderground Storage Tanks · 2.2 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Newburg'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 Newburg.
Total Sites
171
within ~10 miles of Newburg
Risk Level
Elevated
Highest-severity
4 Toxics Release Inventory facilities
Sources Checked
within ~10 miles of Newburg
Severity Distribution
within ~10 miles of Newburg
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Newburg, Nitrate runs higher than the national average — 52 sites within ~10 miles of Newburg. That's not a problem with your land — it's information about 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 Newburg
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 Newburg average
Your land is one point inside Newburg
Everything above resolves to Newburg as a whole — one PHZM band and one 28°F frost record, read across 413 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 Newburg Average
Newburg Average
- ●USDA Zones 6a, averaged across Newburg
- ●One soil character for all of Newburg
- ●Frost dates read at Newburg's scale: Apr 9 to Oct 18
YOUR Parcel
- ✓Your exact zone, not Newburg's 6a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Newburg
Pull a site-specific report for your exact address in Newburg, Missouri — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Newburg averages can't show:
We read public map data around Newburg — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Newburg average
How we know this about Newburg
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 Newburg’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 Newburg
When does frost risk typically end in Newburg?
The last hard freeze (28°F) in Newburg typically lands around Apr 9, 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 30.
When is the first frost in Newburg?
The first hard freeze (28°F) in Newburg typically arrives around Oct 18, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Oct 4, so the watching starts about Sep 18 — about 192 days after the spring freeze cleared.
How long is the growing season in Newburg?
Measured between 28°F hard freezes, Newburg sees about 192 frost-free days — roughly Apr 9 through Oct 18, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Apr 30 to Oct 4, about 157 days.
Is the soil safe to grow vegetables in Newburg?
The federal record around Newburg is a meaningful one — 171 documented sites, mostly Underground Storage Tanks entries (82), the nearest Nitrate record about 0.1 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 Newburg?
From about Sep 18 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 Oct 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 Oct 18. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Newburg's scale — its 6a band and its 192-day season. Your yard writes its own version of Newburg'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 Newburg’s own scale
7 of the readings below were taken at Newburg's own scale — its own ~192-day season between 28°F freezes, the 413 acres it covers and 171 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Newburg's own USDA hardiness band, zones 6aUSDA PHZM 2023
- Newburg's own 28°F hard-freeze dates, about Apr 9 and Oct 18 and the ~192-day span between themNOAA 1991–2020 Climate Normals
- 171 documented contamination sites on the federal record near Newburg, the closest Nitrate record about 0.1 miles out from the town centreFederal environmental registers
- Newburg's boundary and the 413 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 6a and a ~192-day seasonGrowable Ground crop-matching engine
- The ecoregion at Newburg's own centroid, the Ozark HighlandsUS EPA Level III Ecoregions
- Lanternfly survey cells around Newburg 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 Newburg's 413 acres read through its county's SSURGO summaryfrom Phelps County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Phelps 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 Phelps County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Newburg's 413 acreswhy one lot differs from the next →
- Which side of Newburg you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 413 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Nitrate 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 Newburg-wide figureread your own land →
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