Richville, Minnesota, sits in USDA hardiness zone 4a — enough range to grow cool-season vegetables, hardy fruit, and warm-season crops that mature before the first hard frost.
Reliable performers under these conditions include cabbage, cranberry, turkish rocket, and collard greens; what your own ground favors still comes down to its soil, sun, and drainage.
Even in Richville, 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 Richville 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 Richville — soil, climate, flood, and parcel records. How we handle your address.
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Richville — the short answer
Richville, Minnesota: USDA zone 4a, about 172 days between hard freezes, across 631 acres of city.
- USDA zone
- 4a
- 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 14
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~172
- NOAA 1991–2020 Climate Normals, 28°F — this town
- City area
- 631 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 4a is Richville's average, not your lot's — a low corner or a tree line moves it. Against Richville's 172-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Richville
Each reading below is measured for Richville itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredRichville runs about 172 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
MeasuredRichville sits in USDA hardiness zone 4a.
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 Richville is in
Richville sits in the North Central Hardwood Forests — EPA Level III, inside the wider Eastern Temperate Forests. That is read at Richville's own centroid rather than borrowed from Otter Tail County.
What Grows in Richville
Every plant below cleared Richville's own zone 4a and its 172-day season. Each card opens that plant's Minnesota profile. How we score.
Is it too late to plant in Richville?
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 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 14 — 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 Richville
Closest first, within ~10 miles of Richville. Listing isn't leaking, and distance isn't exposure.
- Cals StationUnderground Storage Tanks · 200 ft
- 135N39W28ADD 01Nitrate · 2.4 mi
- 519863Nitrate · 2.6 mi
- 136N39W32CAC 01Nitrate · 2.8 mi
- OT12 REDN NAWQA OT LU well (MM03) 0000244252Nitrate · 2.9 mi
- OT22 REDN NAWQA OT landuse well 0000549738Nitrate · 3.2 mi
- OT01 REDN NAWQA OT landuse well 0000559130Nitrate · 3.2 mi
- 488841Nitrate · 3.5 mi
- HUBER ELECTRICBrownfields · 3.6 mi
- 135N39W35BBB 01Nitrate · 3.7 mi
- Wagon Wheel GroceryUnderground Storage Tanks · 3.7 mi
- Loll's ResortUnderground Storage Tanks · 3.7 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Richville'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 Richville.
Sources Checked
within ~10 miles of Richville
Severity Distribution
within ~10 miles of Richville
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Richville, Nitrate runs higher than the national average — 160 sites within ~10 miles of Richville. 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 Richville
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 Richville average
Your land is one point inside Richville
Everything above resolves to Richville as a whole — one PHZM band and one 28°F frost record, read across 631 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 Richville Average
Richville Average
- ●USDA Zones 4a, averaged across Richville
- ●One soil character for all of Richville
- ●Frost dates read at Richville's scale: Apr 25 to Oct 14
YOUR Parcel
- ✓Your exact zone, not Richville's 4a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Richville
Pull a site-specific report for your exact address in Richville, Minnesota — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Richville averages can't show:
We read public map data around Richville — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Richville average
How we know this about Richville
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 Richville’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 Richville
When does frost risk typically end in Richville?
The last hard freeze (28°F) in Richville 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 Richville?
The first hard freeze (28°F) in Richville typically arrives around Oct 14, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Sep 30, so the watching starts about Sep 14 — about 172 days after the spring freeze cleared.
How long is the growing season in Richville?
Measured between 28°F hard freezes, Richville sees about 172 frost-free days — roughly Apr 25 through Oct 14, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer May 16 to Sep 30, about 137 days.
Is the soil safe to grow vegetables in Richville?
The federal record around Richville is a meaningful one — 244 documented sites, mostly Nitrate entries (160), the nearest Underground Storage Tanks record under a tenth of a mile 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 Richville?
From about Sep 14 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 14 (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 14. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Richville's scale — its 4a band and its 172-day season. Your yard writes its own version of Richville'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 Richville’s own scale
6 of the readings below were taken at Richville's own scale — its own ~172-day season between 28°F freezes, the 631 acres it covers and 244 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Richville's own USDA hardiness band, zones 4aUSDA PHZM 2023
- Richville's own 28°F hard-freeze dates, about Apr 25 and Oct 14 and the ~172-day span between themNOAA 1991–2020 Climate Normals
- 244 documented contamination sites on the federal record near Richville, the closest Underground Storage Tanks record under a tenth of a mile out from the town centreFederal environmental registers
- Richville's boundary and the 631 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 4a and a ~172-day seasonGrowable Ground crop-matching engine
- The ecoregion at Richville's own centroid, the North Central Hardwood ForestsUS EPA Level III Ecoregions
Inherited from a wider read
- Soil character — no town-scale survey exists, so Richville's 631 acres read through its county's SSURGO summaryfrom Otter Tail County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Otter Tail 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 Otter Tail County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Richville's 631 acreswhy one lot differs from the next →
- Which side of Richville you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 631 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 Richville-wide figureread your own land →
More in Minnesota
Wider growing context
What grows across MinnesotaRichville sits outside our named growing regions, so Minnesota as a whole is its closest context here.
Nearby growing guides