Elgin, Iowa, sits in USDA hardiness zone 5a — a range where zone-matched perennials and frost-aware annual timing set what succeeds.
Growers here do well with cabbage, cranberry, lavender, and collard greens — with the usual caveat that any single yard's soil, sun, and drainage cast the deciding vote.
Even in Elgin, 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 Elgin 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 Elgin — soil, climate, flood, and parcel records. How we handle your address.
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Elgin — the short answer
Elgin, Iowa: USDA zone 5a, about 188 days between hard freezes, across 434 acres of city.
- USDA zone
- 5a
- USDA PHZM 2023
- Last hard freeze (28°F)
- Apr 16
- 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
- ~188
- NOAA 1991–2020 Climate Normals, 28°F — this town
- City area
- 434 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 Elgin's average, not your lot's — a low corner or a tree line moves it. Against Elgin's 188-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Elgin
Each reading below is measured for Elgin itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredElgin runs about 188 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
MeasuredElgin 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 Elgin is in
Elgin sits in the Driftless Area — EPA Level III, inside the wider Eastern Temperate Forests. That is read at Elgin's own centroid, and it is not what its county reads: Fayette County is mostly Western Corn Belt Plains. The wider page above you is answering a different question about different ground.
What Grows in Elgin
Every plant below cleared Elgin's own zone 5a and its 188-day season. Each card opens that plant's Iowa profile. How we score.
Is it too late to plant in Elgin?
For most of the year, no — what changes is which crops still fit the days remaining. Cool-season crops can go in from around Mar 19; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Apr 16 (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 Elgin
Closest first, within ~10 miles of Elgin. Listing isn't leaking, and distance isn't exposure.
- VALLEY COOPUnderground Storage Tanks · 500 ft
- METZGER LIVESTOCKUnderground Storage Tanks · 750 ft
- ELGIN CITY PROPERTYUnderground Storage Tanks · 1200 ft
- JOHN FALB & SONSUnderground Storage Tanks · 1400 ft
- 094N07W14CBDA 39679 1955Elgin 2Nitrate · 1500 ft
- VIRGIL CONSTRUnderground Storage Tanks · 1800 ft
- ELGIN SHORT STOPUnderground Storage Tanks · 1800 ft
- VALLEY VETERINARY CLINICUnderground Storage Tanks · 1900 ft
- TORKELSON MOTORS INCBrownfields · 2000 ft
- DONS PHILLIP 66 SREVICEUnderground Storage Tanks · 2200 ft
- FAUSER OIL CO INCUnderground Storage Tanks · 0.5 mi
- 094N07W13CBCC 13991 1962Elgin 3Nitrate · 0.5 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Elgin'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 Elgin.
Total Sites
119
within ~10 miles of Elgin
Risk Level
Moderate
Highest-severity
5 Toxics Release Inventory facilities
Sources Checked
within ~10 miles of Elgin
Severity Distribution
within ~10 miles of Elgin
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Elgin, Nitrate runs higher than the national average — 32 sites within ~10 miles of Elgin. 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 Elgin
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 Elgin average
Your land is one point inside Elgin
Everything above resolves to Elgin as a whole — one PHZM band and one 28°F frost record, read across 434 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 Elgin Average
Elgin Average
- ●USDA Zones 5a, averaged across Elgin
- ●One soil character for all of Elgin
- ●Frost dates read at Elgin's scale: Apr 16 to Oct 21
YOUR Parcel
- ✓Your exact zone, not Elgin's 5a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Elgin
Pull a site-specific report for your exact address in Elgin, Iowa — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Elgin averages can't show:
We read public map data around Elgin — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Elgin average
How we know this about Elgin
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 Elgin’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 Elgin
When does frost risk typically end in Elgin?
The last hard freeze (28°F) in Elgin typically lands around Apr 16, 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 7.
When is the first frost in Elgin?
The first hard freeze (28°F) in Elgin 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 188 days after the spring freeze cleared.
How long is the growing season in Elgin?
Measured between 28°F hard freezes, Elgin sees about 188 frost-free days — roughly Apr 16 through Oct 21, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer May 7 to Oct 7, about 153 days.
Is the soil safe to grow vegetables in Elgin?
The federal record around Elgin shows 119 documented sites, mostly Underground Storage Tanks entries (59), the nearest Underground Storage Tanks record under a tenth of a mile 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 Elgin?
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 Elgin's scale — its 5a band and its 188-day season. Your yard writes its own version of Elgin'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 Elgin’s own scale
6 of the readings below were taken at Elgin's own scale — its own ~188-day season between 28°F freezes, the 434 acres it covers and 119 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Elgin's own USDA hardiness band, zones 5aUSDA PHZM 2023
- Elgin's own 28°F hard-freeze dates, about Apr 16 and Oct 21 and the ~188-day span between themNOAA 1991–2020 Climate Normals
- 119 documented contamination sites on the federal record near Elgin, the closest Underground Storage Tanks record under a tenth of a mile out from the town centreFederal environmental registers
- Elgin's boundary and the 434 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 5a and a ~188-day seasonGrowable Ground crop-matching engine
- Elgin sits in the Driftless Area — not the ecoregion its county mostly readsUS EPA Level III Ecoregions
Inherited from a wider read
- Soil character — no town-scale survey exists, so Elgin's 434 acres read through its county's SSURGO summaryfrom Fayette County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Fayette 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 Fayette County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Elgin's 434 acreswhy one lot differs from the next →
- Which side of Elgin you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 434 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Underground Storage Tanks record under a tenth of a mile 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 Elgin-wide figureread your own land →
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