Correctionville, Iowa, sits in USDA hardiness zone 5a — a zone band wide enough that plant choice, not possibility, is the interesting question.
Crops well matched to these conditions include cabbage, cranberry, lavender, and collard greens — though what thrives on any one site still turns on its specific soil, sun, and drainage.
Even in Correctionville, 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 Correctionville 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 Correctionville — soil, climate, flood, and parcel records. How we handle your address.
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Correctionville — the short answer
Correctionville, Iowa: USDA zone 5a, about 183 days between hard freezes, across 385 acres of city.
- USDA zone
- 5a
- USDA PHZM 2023
- Last hard freeze (28°F)
- Apr 18
- 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
- ~183
- NOAA 1991–2020 Climate Normals, 28°F — this town
- City area
- 385 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 5a is Correctionville's average, not your lot's — a low corner or a tree line moves it. Against Correctionville's 183-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Correctionville
Each reading below is measured for Correctionville itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredCorrectionville runs about 183 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
MeasuredCorrectionville sits in USDA hardiness zone 5a.
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 Correctionville is in
Correctionville sits in the Western Corn Belt Plains — EPA Level III, inside the wider Great Plains. That is read at Correctionville's own centroid rather than borrowed from Woodbury County.
What Grows in Correctionville
Every plant below cleared Correctionville's own zone 5a and its 183-day season. Each card opens that plant's Iowa profile. How we score.
Is it too late to plant in Correctionville?
Almost never — the real question is what to plant next. Cool-season crops can go in from around Mar 21; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Apr 18 (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.
What's on the federal record near Correctionville
Closest first, within ~10 miles of Correctionville. Listing isn't leaking, and distance isn't exposure.
- NEW COOPERATIVE CORRECTIONVILLEUnderground Storage Tanks · 900 ft
- RIVER VALLEY HIGH SCHOOLBrownfields · 1000 ft
- FORMER EASTWOOD COMM SCHOOLUnderground Storage Tanks · 1100 ft
- ARNBURG MOTORUnderground Storage Tanks · 1400 ft
- KNAACKS BODY SHOPBrownfields · 1400 ft
- CASEY''S GENERAL STORE 1159Underground Storage Tanks · 1700 ft
- BREW LLCUnderground Storage Tanks · 1800 ft
- 089N42W34CDC 08854 1957Correctionville 2Nitrate · 2000 ft
- IOWA DEPARTMENT OF TRANSPORTATIONBrownfields · 2500 ft
- WOODBURY CO MAINTENANCE GARAGEUnderground Storage Tanks · 2600 ft
- IDOTUnderground Storage Tanks · 0.8 mi
- ANFINSON FARM STOREUnderground Storage Tanks · 5.1 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Correctionville'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 Correctionville.
Total Sites
51
within ~10 miles of Correctionville
Risk Level
Moderate
Highest-severity
3 brownfield sites
Sources Checked
within ~10 miles of Correctionville
Severity Distribution
within ~10 miles of Correctionville
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Correctionville, Nitrate runs higher than the national average — 22 sites within ~10 miles of Correctionville. Knowing it is half the work — and it's nothing a thoughtful grower can't plan for.
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 Correctionville
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 Correctionville average
Your land is one point inside Correctionville
Everything above resolves to Correctionville as a whole — one PHZM band and one 28°F frost record, read across 385 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 Correctionville Average
Correctionville Average
- ●USDA Zones 5a, averaged across Correctionville
- ●One soil character for all of Correctionville
- ●Frost dates read at Correctionville's scale: Apr 18 to Oct 18
YOUR Parcel
- ✓Your exact zone, not Correctionville's 5a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Correctionville
Pull a site-specific report for your exact address in Correctionville, Iowa — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Correctionville averages can't show:
We read public map data around Correctionville — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Correctionville average
How we know this about Correctionville
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 Correctionville’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 Correctionville
When does frost risk typically end in Correctionville?
The last hard freeze (28°F) in Correctionville typically lands around Apr 18, 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 May 9.
When is the first frost in Correctionville?
The first hard freeze (28°F) in Correctionville 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 183 days after the spring freeze cleared.
How long is the growing season in Correctionville?
Measured between 28°F hard freezes, Correctionville sees about 183 frost-free days — roughly Apr 18 through Oct 18, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer May 9 to Oct 4, about 148 days.
Is the soil safe to grow vegetables in Correctionville?
The federal record around Correctionville shows 51 documented sites, mostly Underground Storage Tanks entries (26), the nearest Underground Storage Tanks record about 0.2 miles out — a typical footprint for a growing area, and proximity to a documented site is information, not a diagnosis of any one yard. It's worth seeing which recorded sites sit closest to where you grow, and testing the soil before new food beds near any of them.
How do I protect my plants from frost in Correctionville?
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 Correctionville's scale — its 5a band and its 183-day season. Your yard writes its own version of Correctionville'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 Correctionville’s own scale
6 of the readings below were taken at Correctionville's own scale — its own ~183-day season between 28°F freezes, the 385 acres it covers and 51 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Correctionville's own USDA hardiness band, zones 5aUSDA PHZM 2023
- Correctionville's own 28°F hard-freeze dates, about Apr 18 and Oct 18 and the ~183-day span between themNOAA 1991–2020 Climate Normals
- 51 documented contamination sites on the federal record near Correctionville, the closest Underground Storage Tanks record about 0.2 miles out from the town centreFederal environmental registers
- Correctionville's boundary and the 385 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 5a and a ~183-day seasonGrowable Ground crop-matching engine
- The ecoregion at Correctionville's own centroid, the Western Corn Belt PlainsUS EPA Level III Ecoregions
Inherited from a wider read
- Soil character — no town-scale survey exists, so Correctionville's 385 acres read through its county's SSURGO summaryfrom Woodbury County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Woodbury County
- The growing challenges every Iowa grower plans around — written at state scale, so they stay on the state guidefrom Iowa
- Butterfly and beetle records, and the farmland pesticide estimate — all published county-widefrom Woodbury County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Correctionville's 385 acreswhy one lot differs from the next →
- Which side of Correctionville you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 385 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 Correctionville-wide figureread your own land →
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