Grant, Iowa, sits in USDA hardiness zone 5b — a range where zone-matched perennials and frost-aware annual timing set what succeeds.
Expect cabbage, cranberry, lavender, and collard greens to be strong candidates here; the deciding factors on any one parcel stay local — soil, sun, and drainage.
Even in Grant, 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 Grant 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 Grant — soil, climate, flood, and parcel records. How we handle your address.
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Grant — the short answer
Grant, Iowa: USDA zone 5b, about 193 days between hard freezes, across 470 acres of city.
- USDA zone
- 5b
- USDA PHZM 2023
- Last hard freeze (28°F)
- Apr 10
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Oct 20
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~193
- NOAA 1991–2020 Climate Normals, 28°F — this town
- City area
- 470 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 5b is Grant's average, not your lot's — a low corner or a tree line moves it. Against Grant's 193-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Grant
Each reading below is measured for Grant itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredGrant runs about 193 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
MeasuredGrant sits in USDA hardiness zone 5b.
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 Grant is in
Grant sits in the Western Corn Belt Plains — EPA Level III, inside the wider Great Plains. That is read at Grant's own centroid rather than borrowed from Montgomery County.
What Grows in Grant
Every plant below cleared Grant's own zone 5b and its 193-day season. Each card opens that plant's Iowa profile. How we score.
Is it too late to plant in Grant?
Rarely: the season closes in stages, not all at once, and each stage has its crops. Cool-season crops can go in from around Mar 13; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Apr 10 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Oct 20 — long-season crops need about 90 days of runway, quick greens only 30. As the window narrows, the plantings just get faster — fall brassicas, then greens, then garlic to finish.
What's on the federal record near Grant
Closest first, within ~10 miles of Grant. Listing isn't leaking, and distance isn't exposure.
- 073N36W02BB 03722 1948Nitrate · 1.3 mi
- HFG INCUnderground Storage Tanks · 2.2 mi
- 074N37W23CDDD 16905 1964Nitrate · 5.5 mi
- 074N36W08CAC 1947Nitrate · 5.6 mi
- 073N37W36CA 14618 1938Nitrate · 5.9 mi
- 074N36W09AAAA 15403 1961Nitrate · 6.0 mi
- NEWMAN BODY SHOP LLCBrownfields · 6.0 mi
- SUNDERMAN SERVICEUnderground Storage Tanks · 6.7 mi
- KWF LLCBrownfields · 7.8 mi
- SCHULER MFGBrownfields · 8.0 mi
- 073N37W29BCCB 12266 1960Nitrate · 8.5 mi
- 073N38W01DADC 14603 1962Elliott 2Nitrate · 9.0 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Grant'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 Grant.
Severity Distribution
within ~10 miles of Grant
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Grant, Nitrate runs higher than the national average — 18 sites within ~10 miles of Grant. 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 Grant
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 Grant average
Your land is one point inside Grant
Everything above resolves to Grant as a whole — one PHZM band and one 28°F frost record, read across 470 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 Grant Average
Grant Average
- ●USDA Zones 5b, averaged across Grant
- ●One soil character for all of Grant
- ●Frost dates read at Grant's scale: Apr 10 to Oct 20
YOUR Parcel
- ✓Your exact zone, not Grant's 5b
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Grant
Pull a site-specific report for your exact address in Grant, Iowa — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Grant averages can't show:
We read public map data around Grant — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Grant average
How we know this about Grant
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 Grant’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 Grant
When does frost risk typically end in Grant?
The last hard freeze (28°F) in Grant typically lands around Apr 10, 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 1.
When is the first frost in Grant?
The first hard freeze (28°F) in Grant typically arrives around Oct 20, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Oct 6, so the watching starts about Sep 20 — about 193 days after the spring freeze cleared.
How long is the growing season in Grant?
Measured between 28°F hard freezes, Grant sees about 193 frost-free days — roughly Apr 10 through Oct 20, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer May 1 to Oct 6, about 158 days.
Is the soil safe to grow vegetables in Grant?
The federal record around Grant is light — 29 documented sites across the 9 federal source types we checked, mostly Nitrate entries (18), the nearest Nitrate record about 1.3 miles out — and proximity to a documented site is information, not a diagnosis of any one yard. Growing food here starts from a strong position; a soil test before new food beds settles any site-specific question.
How do I protect my plants from frost in Grant?
From about Sep 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 Oct 20 (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 20. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Grant's scale — its 5b band and its 193-day season. Your yard writes its own version of Grant'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 Grant’s own scale
6 of the readings below were taken at Grant's own scale — its own ~193-day season between 28°F freezes, the 470 acres it covers and 29 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Grant's own USDA hardiness band, zones 5bUSDA PHZM 2023
- Grant's own 28°F hard-freeze dates, about Apr 10 and Oct 20 and the ~193-day span between themNOAA 1991–2020 Climate Normals
- 29 documented contamination sites on the federal record near Grant, the closest Nitrate record about 1.3 miles out from the town centreFederal environmental registers
- Grant's boundary and the 470 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 5b and a ~193-day seasonGrowable Ground crop-matching engine
- The ecoregion at Grant'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 Grant's 470 acres read through its county's SSURGO summaryfrom Montgomery County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Montgomery 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 Montgomery County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Grant's 470 acreswhy one lot differs from the next →
- Which side of Grant you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 470 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Nitrate record about 1.3 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 Grant-wide figureread your own land →
More in Iowa
Wider growing context
What grows across IowaGrant sits outside our named growing regions, so Iowa as a whole is its closest context here.
Nearby growing guides