Nora Springs, Iowa, sits in USDA hardiness zone 5a — enough range to grow cool-season vegetables, hardy fruit, and warm-season crops that mature before the first hard frost.
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 Nora Springs, 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 Nora Springs 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 Nora Springs — soil, climate, flood, and parcel records. How we handle your address.
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Nora Springs — the short answer
Nora Springs, Iowa: USDA zone 5a, about 184 days between hard freezes, across 1K acres of city.
- USDA zone
- 5a
- USDA PHZM 2023
- Last hard freeze (28°F)
- Apr 17
- 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
- ~184
- NOAA 1991–2020 Climate Normals, 28°F — this town
- City area
- 1K 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 Nora Springs's average, not your lot's — a low corner or a tree line moves it. Against Nora Springs's 184-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Nora Springs
Each reading below is measured for Nora Springs itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredNora Springs runs about 184 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
MeasuredNora Springs 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 Nora Springs is in
Nora Springs sits in the Western Corn Belt Plains — EPA Level III, inside the wider Great Plains. That is read at Nora Springs's own centroid rather than borrowed from Floyd County.
What Grows in Nora Springs
Every plant below cleared Nora Springs's own zone 5a and its 184-day season. Each card opens that plant's Iowa profile. How we score.
Is it too late to plant in Nora Springs?
Usually not — gardeners here simply switch what goes in the ground as the season moves. Cool-season crops can go in from around Mar 20; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Apr 17 (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. As the window narrows, the plantings just get faster — fall brassicas, then greens, then garlic to finish.
What's on the federal record near Nora Springs
Closest first, within ~10 miles of Nora Springs. Listing isn't leaking, and distance isn't exposure.
- 096N18W07DACA 1978Nora Springs 3Nitrate · 250 ft
- 096N18W07DACD 1927Nora Springs 2Nitrate · 700 ft
- MIKE MARSHALLUnderground Storage Tanks · 750 ft
- EUGENE CHENEYUnderground Storage Tanks · 850 ft
- NORA SPRINGS PROPERTYUnderground Storage Tanks · 950 ft
- CARTERSVILLE ELEVATOR/NORA SPRINGS COOPUnderground Storage Tanks · 1100 ft
- CASEY''S GENERAL STORE 1139Underground Storage Tanks · 1100 ft
- 096N18W07DDAD 1958Nora Springs 1Nitrate · 1100 ft
- GLEN IDSOUnderground Storage Tanks · 1400 ft
- ACE COLLISION CENTERBrownfields · 1500 ft
- FLOYD COUNTY PROPERTYUnderground Storage Tanks · 1500 ft
- NORA SPRINGS-ROCK FALLS COMM SCHOOLUnderground Storage Tanks · 1700 ft
6 more sites are on the record inside the same radius. See them on the map
Measured from Nora Springs'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 Nora Springs.
Sources Checked
within ~10 miles of Nora Springs
Severity Distribution
within ~10 miles of Nora Springs
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Nora Springs, Nitrate runs higher than the national average — 72 sites within ~10 miles of Nora Springs. 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 Nora Springs
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 Nora Springs average
Your land is one point inside Nora Springs
Everything above resolves to Nora Springs as a whole — one PHZM band and one 28°F frost record, read across 1K 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 Nora Springs Average
Nora Springs Average
- ●USDA Zones 5a, averaged across Nora Springs
- ●One soil character for all of Nora Springs
- ●Frost dates read at Nora Springs's scale: Apr 17 to Oct 18
YOUR Parcel
- ✓Your exact zone, not Nora Springs's 5a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Nora Springs
Pull a site-specific report for your exact address in Nora Springs, Iowa — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Nora Springs averages can't show:
We read public map data around Nora Springs — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Nora Springs average
How we know this about Nora Springs
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 Nora Springs’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 Nora Springs
When does frost risk typically end in Nora Springs?
The last hard freeze (28°F) in Nora Springs typically lands around Apr 17, 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 8.
When is the first frost in Nora Springs?
The first hard freeze (28°F) in Nora Springs 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 184 days after the spring freeze cleared.
How long is the growing season in Nora Springs?
Measured between 28°F hard freezes, Nora Springs sees about 184 frost-free days — roughly Apr 17 through Oct 18, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer May 8 to Oct 4, about 149 days.
Is the soil safe to grow vegetables in Nora Springs?
The federal record around Nora Springs is a meaningful one — 270 documented sites, mostly Underground Storage Tanks entries (153), the nearest Nitrate record under a tenth of a mile 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 Nora Springs?
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 Nora Springs's scale — its 5a band and its 184-day season. Your yard writes its own version of Nora Springs'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 Nora Springs’s own scale
6 of the readings below were taken at Nora Springs's own scale — its own ~184-day season between 28°F freezes, the 1,418 acres it covers and 270 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Nora Springs's own USDA hardiness band, zones 5aUSDA PHZM 2023
- Nora Springs's own 28°F hard-freeze dates, about Apr 17 and Oct 18 and the ~184-day span between themNOAA 1991–2020 Climate Normals
- 270 documented contamination sites on the federal record near Nora Springs, the closest Nitrate record under a tenth of a mile out from the town centreFederal environmental registers
- Nora Springs's boundary and the 1,418 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 5a and a ~184-day seasonGrowable Ground crop-matching engine
- The ecoregion at Nora Springs'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 Nora Springs's 1,418 acres read through its county's SSURGO summaryfrom Floyd County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Floyd 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 Floyd County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Nora Springs's 1,418 acreswhy one lot differs from the next →
- Which side of Nora Springs you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 1,418 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Nitrate 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 Nora Springs-wide figureread your own land →
More in Iowa
Wider growing context
What grows across IowaNora Springs sits outside our named growing regions, so Iowa as a whole is its closest context here.
Nearby growing guides