Mayfield Colony, South Dakota, sits in USDA hardiness zone 4b — a zone band wide enough that plant choice, not possibility, is the interesting question.
The conditions favor cabbage, cranberry, turkish rocket, and collard greens, among others — though every individual site edits that list with its own soil, sun, and drainage.
Even in Mayfield Colony, 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 Mayfield Colony 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 Mayfield Colony — soil, climate, flood, and parcel records. How we handle your address.
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Mayfield Colony — the short answer
Mayfield Colony, South Dakota: USDA zone 4b, about 169 days between hard freezes, across 165 acres of town.
- USDA zone
- 4b
- USDA PHZM 2023
- Last hard freeze (28°F)
- Apr 24
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Oct 10
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~169
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Town area
- 165 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 4b is Mayfield Colony's average, not your lot's — a low corner or a tree line moves it. Against Mayfield Colony's 169-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Mayfield Colony
Each reading below is measured for Mayfield Colony itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredMayfield Colony runs about 169 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
MeasuredMayfield Colony sits in USDA hardiness zone 4b.
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 Mayfield Colony is in
Mayfield Colony sits in the Northern Glaciated Plains — EPA Level III, inside the wider Great Plains. That is read at Mayfield Colony's own centroid rather than borrowed from Clark County.
What Grows in Mayfield Colony
Every plant below cleared Mayfield Colony's own zone 4b and its 169-day season. Each card opens that plant's South Dakota profile. How we score.
Is it too late to plant in Mayfield Colony?
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 27; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Apr 24 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Oct 10 — long-season crops need about 90 days of runway, quick greens only 30. Late in the year the fall bench takes over — quick greens, radishes, and garlic that repays you next summer.
What's on the federal record near Mayfield Colony
Closest first, within ~10 miles of Mayfield Colony. Listing isn't leaking, and distance isn't exposure.
- 114N56W27CBBCNitrate · 3.0 mi
- KERKVLIET DAIRY FARMUnderground Storage Tanks · 3.0 mi
- TACK SHACKUnderground Storage Tanks · 5.1 mi
- WILLOW LAKE TBSBrownfields · 5.3 mi
- DAKOTA CONVENIENCE STOREUnderground Storage Tanks · 5.5 mi
- BUS SHEDUnderground Storage Tanks · 5.5 mi
- 114N57W17AAAANitrate · 5.6 mi
- SIOUX RURAL WATER SYSTEMPFAS · 5.8 mi
- 114N57W20DDDDNitrate · 6.1 mi
- 114N57W34CCCCNitrate · 6.3 mi
- 114N57W34CCCC2Nitrate · 6.3 mi
- 113N57W 4ADAANitrate · 6.5 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Mayfield Colony'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 Mayfield Colony.
Sources Checked
within ~10 miles of Mayfield Colony
Severity Distribution
within ~10 miles of Mayfield Colony
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Mayfield Colony, Nitrate runs higher than the national average — 40 sites within ~10 miles of Mayfield Colony. 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 Mayfield Colony
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 Mayfield Colony average
Your land is one point inside Mayfield Colony
Everything above resolves to Mayfield Colony as a whole — one PHZM band and one 28°F frost record, read across 165 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 town 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 Mayfield Colony Average
Mayfield Colony Average
- ●USDA Zones 4b, averaged across Mayfield Colony
- ●One soil character for all of Mayfield Colony
- ●Frost dates read at Mayfield Colony's scale: Apr 24 to Oct 10
YOUR Parcel
- ✓Your exact zone, not Mayfield Colony's 4b
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Mayfield Colony
Pull a site-specific report for your exact address in Mayfield Colony, South Dakota — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Mayfield Colony averages can't show:
We read public map data around Mayfield Colony — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Mayfield Colony average
How we know this about Mayfield Colony
The datasets: hardiness from the USDA ARS Plant Hardiness Zone Map 2023, read at this town’s own centroid; hard-freeze dates from NOAA 1991–2020 28°F normals at Mayfield Colony’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 town grain anywhere on this page — there is no town-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 Mayfield Colony
When does frost risk typically end in Mayfield Colony?
The last hard freeze (28°F) in Mayfield Colony typically lands around Apr 24, 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 15.
When is the first frost in Mayfield Colony?
The first hard freeze (28°F) in Mayfield Colony typically arrives around Oct 10, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Sep 26, so the watching starts about Sep 10 — about 169 days after the spring freeze cleared.
How long is the growing season in Mayfield Colony?
Measured between 28°F hard freezes, Mayfield Colony sees about 169 frost-free days — roughly Apr 24 through Oct 10, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer May 15 to Sep 26, about 134 days.
Is the soil safe to grow vegetables in Mayfield Colony?
The federal record around Mayfield Colony shows 51 documented sites, mostly Nitrate entries (40), the nearest Nitrate record about 3.0 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 Mayfield Colony?
From about Sep 10 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 10 (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 10. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Mayfield Colony's scale — its 4b band and its 169-day season. Your yard writes its own version of Mayfield Colony'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 Mayfield Colony’s own scale
6 of the readings below were taken at Mayfield Colony's own scale — its own ~169-day season between 28°F freezes, the 165 acres it covers and 51 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Mayfield Colony's own USDA hardiness band, zones 4bUSDA PHZM 2023
- Mayfield Colony's own 28°F hard-freeze dates, about Apr 24 and Oct 10 and the ~169-day span between themNOAA 1991–2020 Climate Normals
- 51 documented contamination sites on the federal record near Mayfield Colony, the closest Nitrate record about 3.0 miles out from the town centreFederal environmental registers
- Mayfield Colony's boundary and the 165 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 4b and a ~169-day seasonGrowable Ground crop-matching engine
- The ecoregion at Mayfield Colony's own centroid, the Northern Glaciated PlainsUS EPA Level III Ecoregions
Inherited from a wider read
- Soil character — no town-scale survey exists, so Mayfield Colony's 165 acres read through its county's SSURGO summaryfrom Clark County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Clark County
- The growing challenges every South Dakota grower plans around — written at state scale, so they stay on the state guidefrom South Dakota
- Butterfly and beetle records, and the farmland pesticide estimate — all published county-widefrom Clark County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Mayfield Colony's 165 acreswhy one lot differs from the next →
- Which side of Mayfield Colony you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 165 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Nitrate record about 3.0 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 Mayfield Colony-wide figureread your own land →