Poinsett Colony, South Dakota, sits in USDA hardiness zone 4b — a range where zone-matched perennials and frost-aware annual timing set what succeeds.
A short list that earns its place here — cabbage, cranberry, turkish rocket, and collard greens — with any one site's soil, sun, and drainage making the final cut.
Even in Poinsett 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 Poinsett 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 Poinsett Colony — soil, climate, flood, and parcel records. How we handle your address.
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Poinsett Colony — the short answer
Poinsett Colony, South Dakota: USDA zone 4b, about 165 days between hard freezes, across 164 acres of town.
- USDA zone
- 4b
- USDA PHZM 2023
- Last hard freeze (28°F)
- Apr 27
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Oct 9
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~165
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Town area
- 164 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 Poinsett Colony's average, not your lot's — a low corner or a tree line moves it. Against Poinsett Colony's 165-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Poinsett Colony
Each reading below is measured for Poinsett Colony itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredPoinsett Colony runs about 165 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
MeasuredPoinsett 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 Poinsett Colony is in
Poinsett Colony sits in the Northern Glaciated Plains — EPA Level III, inside the wider Great Plains. That is read at Poinsett Colony's own centroid rather than borrowed from Hamlin County.
What Grows in Poinsett Colony
Every plant below cleared Poinsett Colony's own zone 4b and its 165-day season. Each card opens that plant's South Dakota profile. How we score.
Is it too late to plant in Poinsett Colony?
Usually not — gardeners here simply switch what goes in the ground as the season moves. Cool-season crops can go in from around Mar 30; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Apr 27 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Oct 9 — long-season crops need about 90 days of runway, quick greens only 30. Even past midsummer there is room for a true fall garden here, and garlic planted near the close carries the momentum into next year.
What's on the federal record near Poinsett Colony
Closest first, within ~10 miles of Poinsett Colony. Listing isn't leaking, and distance isn't exposure.
- 113N51W 1ABBBNitrate · 0.6 mi
- 114N51W25DAANitrate · 0.9 mi
- 114N51W27CCCCNitrate · 2.2 mi
- 114N51W28CCCCNitrate · 2.8 mi
- 113N51W10CCDDNitrate · 3.4 mi
- 113N51W23ABBB2Nitrate · 3.8 mi
- 113N51W24BCBCNitrate · 4.1 mi
- 113N51W23CAANitrate · 4.1 mi
- SANFORD CLINIC ESTELLINEBrownfields · 4.3 mi
- 113N51W24CCCDNitrate · 4.4 mi
- 113N51W24CCBBNitrate · 4.5 mi
- DALES STANDARD SERVICEUnderground Storage Tanks · 4.6 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Poinsett 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 Poinsett Colony.
Total Sites
92
within ~10 miles of Poinsett Colony
Risk Level
Moderate
Highest-severity
3 brownfield sites
Sources Checked
within ~10 miles of Poinsett Colony
Severity Distribution
within ~10 miles of Poinsett Colony
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Poinsett Colony, Nitrate runs higher than the national average — 80 sites within ~10 miles of Poinsett Colony. Knowing it is half the work — and it's nothing a thoughtful grower can't plan for.
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 Poinsett 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 Poinsett Colony average
Your land is one point inside Poinsett Colony
Everything above resolves to Poinsett Colony as a whole — one PHZM band and one 28°F frost record, read across 164 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 Poinsett Colony Average
Poinsett Colony Average
- ●USDA Zones 4b, averaged across Poinsett Colony
- ●One soil character for all of Poinsett Colony
- ●Frost dates read at Poinsett Colony's scale: Apr 27 to Oct 9
YOUR Parcel
- ✓Your exact zone, not Poinsett Colony's 4b
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Poinsett Colony
Pull a site-specific report for your exact address in Poinsett Colony, South Dakota — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Poinsett Colony averages can't show:
We read public map data around Poinsett Colony — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Poinsett Colony average
How we know this about Poinsett 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 Poinsett 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 Poinsett Colony
When does frost risk typically end in Poinsett Colony?
The last hard freeze (28°F) in Poinsett Colony typically lands around Apr 27, 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 18.
When is the first frost in Poinsett Colony?
The first hard freeze (28°F) in Poinsett Colony typically arrives around Oct 9, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Sep 25, so the watching starts about Sep 9 — about 165 days after the spring freeze cleared.
How long is the growing season in Poinsett Colony?
Measured between 28°F hard freezes, Poinsett Colony sees about 165 frost-free days — roughly Apr 27 through Oct 9, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer May 18 to Sep 25, about 130 days.
Is the soil safe to grow vegetables in Poinsett Colony?
The federal record around Poinsett Colony shows 92 documented sites, mostly Nitrate entries (80), the nearest Nitrate record about 0.6 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 Poinsett Colony?
From about Sep 9 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 9 (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 9. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Poinsett Colony's scale — its 4b band and its 165-day season. Your yard writes its own version of Poinsett 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 Poinsett Colony’s own scale
6 of the readings below were taken at Poinsett Colony's own scale — its own ~165-day season between 28°F freezes, the 164 acres it covers and 92 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Poinsett Colony's own USDA hardiness band, zones 4bUSDA PHZM 2023
- Poinsett Colony's own 28°F hard-freeze dates, about Apr 27 and Oct 9 and the ~165-day span between themNOAA 1991–2020 Climate Normals
- 92 documented contamination sites on the federal record near Poinsett Colony, the closest Nitrate record about 0.6 miles out from the town centreFederal environmental registers
- Poinsett Colony's boundary and the 164 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 4b and a ~165-day seasonGrowable Ground crop-matching engine
- The ecoregion at Poinsett 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 Poinsett Colony's 164 acres read through its county's SSURGO summaryfrom Hamlin County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Hamlin 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 Hamlin County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Poinsett Colony's 164 acreswhy one lot differs from the next →
- Which side of Poinsett 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 164 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Nitrate record about 0.6 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 Poinsett Colony-wide figureread your own land →