Floyd, Iowa, sits in USDA hardiness zone 5a — a range where zone-matched perennials and frost-aware annual timing set what succeeds.
Reliable performers under these conditions include cabbage, cranberry, lavender, and collard greens; what your own ground favors still comes down to its soil, sun, and drainage.
Even in Floyd, 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 Floyd 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 Floyd — soil, climate, flood, and parcel records. How we handle your address.
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Floyd — the short answer
Floyd, Iowa: USDA zone 5a, about 189 days between hard freezes, across 353 acres of city.
- USDA zone
- 5a
- USDA PHZM 2023
- Last hard freeze (28°F)
- Apr 14
- 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
- ~189
- NOAA 1991–2020 Climate Normals, 28°F — this town
- City area
- 353 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 Floyd's average, not your lot's — a low corner or a tree line moves it. Against Floyd's 189-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Floyd
Each reading below is measured for Floyd itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredFloyd 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
MeasuredFloyd 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 Floyd is in
Floyd sits in the Western Corn Belt Plains — EPA Level III, inside the wider Great Plains. That is read at Floyd's own centroid rather than borrowed from Floyd County.
What Grows in Floyd
Every plant below cleared Floyd'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 Floyd?
Too late for some crops, right on time for others — a growing season is a sequence, not a deadline. Cool-season crops can go in from around Mar 17; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Apr 14 (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 Floyd
Closest first, within ~10 miles of Floyd. Listing isn't leaking, and distance isn't exposure.
- FLOYD PROPERTYUnderground Storage Tanks · 400 ft
- PETERS GARAGE & TIRE SERVICE COBrownfields · 500 ft
- CROOK PROPERTYUnderground Storage Tanks · 550 ft
- CARRS SERVICE STATIONUnderground Storage Tanks · 1000 ft
- 096N16W21ABDD 03352 1948Floyd 1Nitrate · 1700 ft
- 096N16W21ABCD 1977Floyd 2Nitrate · 1700 ft
- LOVES TRAVEL STOP 670Underground Storage Tanks · 2100 ft
- 218 FUEL EXPRESSUnderground Storage Tanks · 2200 ft
- 096N16W28CDA 01760 1943Floyd County HomeNitrate · 1.9 mi
- VALERO - CHARLES CITY ETHANOL PLANTBrownfields · 2.2 mi
- VALERO - CHARLES CITY ETHANOL PLANTToxics Release Inventory · 2.2 mi
- FT DODGE ANIMAL HEALTH INCBrownfields · 3.7 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Floyd'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 Floyd.
Sources Checked
within ~10 miles of Floyd
Severity Distribution
within ~10 miles of Floyd
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Floyd, two things run higher than the national average within ~10 miles of Floyd — Superfund (3 sites) and Nitrate (40 sites). That's not a problem with your land — it's information about it.
Superfund: Superfund sites represent the most severe contamination in the federal system.
Nitrate: Nitrate contamination primarily comes from agricultural fertilizer runoff and failing septic systems.
Commission professional soil testing before any food production (test for heavy metals, VOCs, and SVOCs).
Test well water for nitrate if you rely on a private well for irrigation (EPA standard: 10 mg/L).
Check your specific parcel in Floyd
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 Floyd average
Your land is one point inside Floyd
Everything above resolves to Floyd as a whole — one PHZM band and one 28°F frost record, read across 353 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 Floyd Average
Floyd Average
- ●USDA Zones 5a, averaged across Floyd
- ●One soil character for all of Floyd
- ●Frost dates read at Floyd's scale: Apr 14 to Oct 20
YOUR Parcel
- ✓Your exact zone, not Floyd's 5a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Floyd
Pull a site-specific report for your exact address in Floyd, Iowa — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Floyd averages can't show:
We read public map data around Floyd — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Floyd average
How we know this about Floyd
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 Floyd’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 Floyd
When does frost risk typically end in Floyd?
The last hard freeze (28°F) in Floyd typically lands around Apr 14, 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 5.
When is the first frost in Floyd?
The first hard freeze (28°F) in Floyd 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 189 days after the spring freeze cleared.
How long is the growing season in Floyd?
Measured between 28°F hard freezes, Floyd sees about 189 frost-free days — roughly Apr 14 through Oct 20, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer May 5 to Oct 6, about 154 days.
Is the soil safe to grow vegetables in Floyd?
The federal record around Floyd runs heavier than most — 146 documented sites, mostly Underground Storage Tanks entries (73), the nearest Underground Storage Tanks record under a tenth of a mile out — so test the soil before planting food in the ground, and raised beds with clean imported soil grow well in the meantime. Even here, proximity to a documented site is information, not a diagnosis of any one yard; the contamination map shows exactly what's recorded and where.
How do I protect my plants from frost in Floyd?
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 Floyd's scale — its 5a band and its 189-day season. Your yard writes its own version of Floyd'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 Floyd’s own scale
6 of the readings below were taken at Floyd's own scale — its own ~189-day season between 28°F freezes, the 353 acres it covers and 146 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Floyd's own USDA hardiness band, zones 5aUSDA PHZM 2023
- Floyd's own 28°F hard-freeze dates, about Apr 14 and Oct 20 and the ~189-day span between themNOAA 1991–2020 Climate Normals
- 146 documented contamination sites on the federal record near Floyd, the closest Underground Storage Tanks record under a tenth of a mile out from the town centreFederal environmental registers
- Floyd's boundary and the 353 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 Floyd'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 Floyd's 353 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 Floyd's 353 acreswhy one lot differs from the next →
- Which side of Floyd you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 353 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 Floyd-wide figureread your own land →
More in Iowa
Wider growing context
What grows across IowaFloyd sits outside our named growing regions, so Iowa as a whole is its closest context here.
Nearby growing guides