South St. Paul, Minnesota, 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.
Well-matched crops include cabbage, cranberry, lavender, and collard greens, and the gap between "grows in the area" and "grows in your yard" is closed by soil, sun, and drainage.
Even in South St. Paul, 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 South St. Paul 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 South St. Paul — soil, climate, flood, and parcel records. How we handle your address.
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South St. Paul — the short answer
South St. Paul, Minnesota: USDA zone 5a, about 197 days between hard freezes, across 4K acres of city.
- USDA zone
- 5a
- USDA PHZM 2023
- Last hard freeze (28°F)
- Apr 11
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Oct 25
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~197
- NOAA 1991–2020 Climate Normals, 28°F — this town
- City area
- 4K 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 South St. Paul's average, not your lot's — a low corner or a tree line moves it. Against South St. Paul's 197-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in South St. Paul
Each reading below is measured for South St. Paul itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredSouth St. Paul runs about 197 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
MeasuredSouth St. Paul 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 South St. Paul is in
South St. Paul sits in the North Central Hardwood Forests — EPA Level III, inside the wider Eastern Temperate Forests. That is read at South St. Paul's own centroid, and it is not what its county reads: Dakota County is mostly Western Corn Belt Plains. The wider page above you is answering a different question about different ground.
What Grows in South St. Paul
Every plant below cleared South St. Paul's own zone 5a and its 197-day season. Each card opens that plant's Minnesota profile. How we score.
Is it too late to plant in South St. Paul?
Rarely: the season closes in stages, not all at once, and each stage has its crops. Cool-season crops can go in from around Mar 14; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Apr 11 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Oct 25 — 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 South St. Paul
Closest first, within ~10 miles of South St. Paul. Listing isn't leaking, and distance isn't exposure.
- South Saint PaulPFAS · 300 ft
- QUALITY SERVICES CORPBrownfields · 400 ft
- Nipps Phillips 66Underground Storage Tanks · 650 ft
- Southview 66Underground Storage Tanks · 800 ft
- SOUTHVIEW 66Brownfields · 800 ft
- NISTLER DAN DDSBrownfields · 950 ft
- FENSHOLT BRIDGET DRBrownfields · 1000 ft
- MARIE AVENUE SERVICEBrownfields · 1000 ft
- PRORX PHARMACYBrownfields · 1000 ft
- ZENLJ WARRENBrownfields · 1100 ft
- Super Store #7Underground Storage Tanks · 1100 ft
- South Saint Paul Feed Inc/drovers DivUnderground Storage Tanks · 1100 ft
6 more sites are on the record inside the same radius. See them on the map
Measured from South St. Paul'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 South St. Paul.
Sources Checked
within ~10 miles of South St. Paul
Severity Distribution
within ~10 miles of South St. Paul
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around South St. Paul, Brownfields runs higher than the national average — 3,970 sites within ~10 miles of South St. Paul. Knowing it is half the work — and it's nothing a thoughtful grower can't plan for.
Brownfields: Brownfield sites are former commercial or industrial properties where legacy soil contamination (heavy metals, PAHs, petroleum compounds) may persist.
Check EPA brownfield remediation status — many sites have completed cleanup with institutional controls.
Check your specific parcel in South St. Paul
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 South St. Paul average
Your land is one point inside South St. Paul
Everything above resolves to South St. Paul as a whole — one PHZM band and one 28°F frost record, read across 4K 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 South St. Paul Average
South St. Paul Average
- ●USDA Zones 5a, averaged across South St. Paul
- ●One soil character for all of South St. Paul
- ●Frost dates read at South St. Paul's scale: Apr 11 to Oct 25
YOUR Parcel
- ✓Your exact zone, not South St. Paul's 5a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in South St. Paul
Pull a site-specific report for your exact address in South St. Paul, Minnesota — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that South St. Paul averages can't show:
We read public map data around South St. Paul — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the South St. Paul average
How we know this about South St. Paul
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 South St. Paul’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 South St. Paul
When does frost risk typically end in South St. Paul?
The last hard freeze (28°F) in South St. Paul typically lands around Apr 11, 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 2.
When is the first frost in South St. Paul?
The first hard freeze (28°F) in South St. Paul typically arrives around Oct 25, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Oct 11, so the watching starts about Sep 25 — about 197 days after the spring freeze cleared.
How long is the growing season in South St. Paul?
Measured between 28°F hard freezes, South St. Paul sees about 197 frost-free days — roughly Apr 11 through Oct 25, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer May 2 to Oct 11, about 162 days.
Is the soil safe to grow vegetables in South St. Paul?
The federal record around South St. Paul runs heavier than most — 5,631 documented sites, mostly Brownfields entries (3,970), the nearest PFAS 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 South St. Paul?
From about Sep 25 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 25 (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 25. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at South St. Paul's scale — its 5a band and its 197-day season. Your yard writes its own version of South St. Paul'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 South St. Paul’s own scale
6 of the readings below were taken at South St. Paul's own scale — its own ~197-day season between 28°F freezes, the 3,600 acres it covers and 5,631 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- South St. Paul's own USDA hardiness band, zones 5aUSDA PHZM 2023
- South St. Paul's own 28°F hard-freeze dates, about Apr 11 and Oct 25 and the ~197-day span between themNOAA 1991–2020 Climate Normals
- 5,631 documented contamination sites on the federal record near South St. Paul, the closest PFAS record under a tenth of a mile out from the town centreFederal environmental registers
- South St. Paul's boundary and the 3,600 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 5a and a ~197-day seasonGrowable Ground crop-matching engine
- South St. Paul sits in the North Central Hardwood Forests — not the ecoregion its county mostly readsUS EPA Level III Ecoregions
Inherited from a wider read
- Soil character — no town-scale survey exists, so South St. Paul's 3,600 acres read through its county's SSURGO summaryfrom Dakota County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Dakota County
- The growing challenges every Minnesota grower plans around — written at state scale, so they stay on the state guidefrom Minnesota
- Butterfly and beetle records, and the farmland pesticide estimate — all published county-widefrom Dakota County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among South St. Paul's 3,600 acreswhy one lot differs from the next →
- Which side of South St. Paul you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 3,600 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest PFAS 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 South St. Paul-wide figureread your own land →