Brookings, South Dakota, sits in USDA hardiness zone 4b — room for a real mix of vegetables, fruit, and perennials matched to the local frost calendar.
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 Brookings, 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 Brookings 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 Brookings — soil, climate, flood, and parcel records. How we handle your address.
No card required · your full report in seconds
Brookings — the short answer
Brookings, South Dakota: USDA zone 4b, about 166 days between hard freezes, across 9K acres of city.
- USDA zone
- 4b
- USDA PHZM 2023
- Last hard freeze (28°F)
- Apr 25
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Oct 8
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~166
- NOAA 1991–2020 Climate Normals, 28°F — this town
- City area
- 9K 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 Brookings's average, not your lot's — a low corner or a tree line moves it. Against Brookings's 166-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Brookings
Each reading below is measured for Brookings itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredBrookings runs about 166 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
MeasuredBrookings 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 Brookings is in
Brookings sits in the Northern Glaciated Plains — EPA Level III, inside the wider Great Plains. That is read at Brookings's own centroid rather than borrowed from Brookings County.
What Grows in Brookings
Every plant below cleared Brookings's own zone 4b and its 166-day season. Each card opens that plant's South Dakota profile. How we score.
Is it too late to plant in Brookings?
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 28; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Apr 25 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Oct 8 — 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 Brookings
Closest first, within ~10 miles of Brookings. Listing isn't leaking, and distance isn't exposure.
- AGRI PRO SEED/ SOKOTO DIVISIONUnderground Storage Tanks · 1100 ft
- LJS PROFESSIONAL BODY SHOPBrownfields · 1700 ft
- CITY OF BROOKINGS, ST DEPTUnderground Storage Tanks · 2200 ft
- SCHOOL BUS GARAGEUnderground Storage Tanks · 2500 ft
- FIRST NATIONAL BANKBrownfields · 0.5 mi
- BOZIED AMOCOUnderground Storage Tanks · 0.5 mi
- 7-11 #522Underground Storage Tanks · 0.6 mi
- 7-11 #523Underground Storage Tanks · 0.6 mi
- PANGEA HIGHWAY MARTUnderground Storage Tanks · 0.6 mi
- CASEY'S GENERAL STOREUnderground Storage Tanks · 0.6 mi
- CENEX ZIP TRIP 63Underground Storage Tanks · 0.6 mi
- L & L AUTO PARTS INCBrownfields · 0.6 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Brookings'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 Brookings.
Total Sites
277
within ~10 miles of Brookings
Risk Level
Elevated
Highest-severity
15 Toxics Release Inventory facilities
Sources Checked
within ~10 miles of Brookings
Severity Distribution
within ~10 miles of Brookings
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Brookings, Nitrate runs higher than the national average — 128 sites within ~10 miles of Brookings. 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 Brookings
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 Brookings average
Your land is one point inside Brookings
Everything above resolves to Brookings as a whole — one PHZM band and one 28°F frost record, read across 9K 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 Brookings Average
Brookings Average
- ●USDA Zones 4b, averaged across Brookings
- ●One soil character for all of Brookings
- ●Frost dates read at Brookings's scale: Apr 25 to Oct 8
YOUR Parcel
- ✓Your exact zone, not Brookings's 4b
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Brookings
Pull a site-specific report for your exact address in Brookings, South Dakota — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Brookings averages can't show:
We read public map data around Brookings — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Brookings average
How we know this about Brookings
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 Brookings’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 Brookings
When does frost risk typically end in Brookings?
The last hard freeze (28°F) in Brookings typically lands around Apr 25, 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 16.
When is the first frost in Brookings?
The first hard freeze (28°F) in Brookings typically arrives around Oct 8, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Sep 24, so the watching starts about Sep 8 — about 166 days after the spring freeze cleared.
How long is the growing season in Brookings?
Measured between 28°F hard freezes, Brookings sees about 166 frost-free days — roughly Apr 25 through Oct 8, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer May 16 to Sep 24, about 131 days.
Is the soil safe to grow vegetables in Brookings?
The federal record around Brookings is a meaningful one — 277 documented sites, mostly Nitrate entries (128), the nearest Underground Storage Tanks record about 0.2 miles 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 Brookings?
From about Sep 8 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 8 (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 8. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Brookings's scale — its 4b band and its 166-day season. Your yard writes its own version of Brookings'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 Brookings’s own scale
6 of the readings below were taken at Brookings's own scale — its own ~166-day season between 28°F freezes, the 8,932 acres it covers and 277 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Brookings's own USDA hardiness band, zones 4bUSDA PHZM 2023
- Brookings's own 28°F hard-freeze dates, about Apr 25 and Oct 8 and the ~166-day span between themNOAA 1991–2020 Climate Normals
- 277 documented contamination sites on the federal record near Brookings, the closest Underground Storage Tanks record about 0.2 miles out from the town centreFederal environmental registers
- Brookings's boundary and the 8,932 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 4b and a ~166-day seasonGrowable Ground crop-matching engine
- The ecoregion at Brookings's own centroid, the Northern Glaciated PlainsUS EPA Level III Ecoregions
Inherited from a wider read
- Soil character — no town-scale survey exists, so Brookings's 8,932 acres read through its county's SSURGO summaryfrom Brookings County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Brookings 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 Brookings County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Brookings's 8,932 acreswhy one lot differs from the next →
- Which side of Brookings you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 8,932 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Underground Storage Tanks record about 0.2 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 Brookings-wide figureread your own land →