Rodman, Iowa, sits in USDA hardiness zone 5a — a zone band wide enough that plant choice, not possibility, is the interesting question.
The conditions favor cabbage, cranberry, lavender, and collard greens, among others — though every individual site edits that list with its own soil, sun, and drainage.
Even in Rodman, 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 Rodman 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 Rodman — soil, climate, flood, and parcel records. How we handle your address.
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Rodman — the short answer
Rodman, Iowa: USDA zone 5a, about 189 days between hard freezes, across 93 acres of city.
- USDA zone
- 5a
- USDA PHZM 2023
- Last hard freeze (28°F)
- Apr 15
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Oct 21
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~189
- NOAA 1991–2020 Climate Normals, 28°F — this town
- City area
- 93 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 Rodman's average, not your lot's — a low corner or a tree line moves it. Against Rodman's 189-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Rodman
Each reading below is measured for Rodman itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredRodman runs about 189 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
MeasuredRodman 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 Rodman is in
Rodman sits in the Western Corn Belt Plains — EPA Level III, inside the wider Great Plains. That is read at Rodman's own centroid rather than borrowed from Palo Alto County.
What Grows in Rodman
Every plant below cleared Rodman's own zone 5a and its 189-day season. Each card opens that plant's Iowa profile. How we score.
Is it too late to plant in Rodman?
Almost never — the real question is what to plant next. Cool-season crops can go in from around Mar 18; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Apr 15 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Oct 21 — long-season crops need about 90 days of runway, quick greens only 30. The tail of the season still works: sixty-day crops into late summer, quick greens after, garlic last of all.
What's on the federal record near Rodman
Closest first, within ~10 miles of Rodman. Listing isn't leaking, and distance isn't exposure.
- 095N31W20DC 12191 1959Rodman SchoolNitrate · 600 ft
- ITC MIDWEST RODMAN REGULATINGBrownfields · 1900 ft
- GSP-MAX IIICAFO · 3.1 mi
- KOLASCH FARMS, INC. #1CAFO · 3.3 mi
- NORTHERN NATURAL GAS - CYLINDER TBSBrownfields · 4.2 mi
- CYLINDER COOP ELEVATOR COBrownfields · 4.3 mi
- JT BODY SHOPBrownfields · 4.3 mi
- PALO ALTO COUNTY SHEDUnderground Storage Tanks · 4.4 mi
- T SIEMERSUnderground Storage Tanks · 4.4 mi
- CYLINDER COOP ELEV COUnderground Storage Tanks · 4.4 mi
- WEGENER PROPERTYUnderground Storage Tanks · 4.4 mi
- 096N31W34BA 10872 1959Nitrate · 4.9 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Rodman'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 Rodman.
Total Sites
99
within ~10 miles of Rodman
Risk Level
Moderate
Highest-severity
6 Toxics Release Inventory facilities
Sources Checked
within ~10 miles of Rodman
Severity Distribution
within ~10 miles of Rodman
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Rodman, Nitrate runs higher than the national average — 28 sites within ~10 miles of Rodman. 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 Rodman
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 Rodman average
Your land is one point inside Rodman
Everything above resolves to Rodman as a whole — one PHZM band and one 28°F frost record, read across 93 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 Rodman Average
Rodman Average
- ●USDA Zones 5a, averaged across Rodman
- ●One soil character for all of Rodman
- ●Frost dates read at Rodman's scale: Apr 15 to Oct 21
YOUR Parcel
- ✓Your exact zone, not Rodman's 5a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Rodman
Pull a site-specific report for your exact address in Rodman, Iowa — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Rodman averages can't show:
We read public map data around Rodman — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Rodman average
How we know this about Rodman
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 Rodman’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 Rodman
When does frost risk typically end in Rodman?
The last hard freeze (28°F) in Rodman typically lands around Apr 15, 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 6.
When is the first frost in Rodman?
The first hard freeze (28°F) in Rodman typically arrives around Oct 21, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Oct 7, so the watching starts about Sep 21 — about 189 days after the spring freeze cleared.
How long is the growing season in Rodman?
Measured between 28°F hard freezes, Rodman sees about 189 frost-free days — roughly Apr 15 through Oct 21, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer May 6 to Oct 7, about 154 days.
Is the soil safe to grow vegetables in Rodman?
The federal record around Rodman shows 99 documented sites, mostly Underground Storage Tanks entries (44), the nearest Nitrate record about 0.1 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 Rodman?
From about Sep 21 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 21 (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 21. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Rodman's scale — its 5a band and its 189-day season. Your yard writes its own version of Rodman'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 Rodman’s own scale
6 of the readings below were taken at Rodman's own scale — its own ~189-day season between 28°F freezes, the 93 acres it covers and 99 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Rodman's own USDA hardiness band, zones 5aUSDA PHZM 2023
- Rodman's own 28°F hard-freeze dates, about Apr 15 and Oct 21 and the ~189-day span between themNOAA 1991–2020 Climate Normals
- 99 documented contamination sites on the federal record near Rodman, the closest Nitrate record about 0.1 miles out from the town centreFederal environmental registers
- Rodman's boundary and the 93 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 5a and a ~189-day seasonGrowable Ground crop-matching engine
- The ecoregion at Rodman'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 Rodman's 93 acres read through its county's SSURGO summaryfrom Palo Alto County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Palo Alto 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 Palo Alto County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Rodman's 93 acreswhy one lot differs from the next →
- Which side of Rodman you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 93 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 Rodman-wide figureread your own land →
More in Iowa
Wider growing context
What grows across IowaRodman sits outside our named growing regions, so Iowa as a whole is its closest context here.
Nearby growing guides