Roy Lake, Minnesota, sits in USDA hardiness zone 3b — a band that supports both cool-season staples and warm-season crops chosen to fit the local frost window.
On paper, cabbage, cranberry, turkish rocket, and collard greens all suit these conditions — on the ground, soil, sun, and drainage make the final call.
Even in Roy Lake, 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 Roy Lake 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 Roy Lake — soil, climate, flood, and parcel records. How we handle your address.
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Roy Lake — the short answer
Roy Lake, Minnesota: USDA zone 3b, about 159 days between hard freezes, across 287 acres of town.
- USDA zone
- 3b
- USDA PHZM 2023
- Last hard freeze (28°F)
- May 3
- 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
- ~159
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Town area
- 287 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 3b is Roy Lake's average, not your lot's — a low corner or a tree line moves it. Against Roy Lake's 159-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Roy Lake
Each reading below is measured for Roy Lake itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredRoy Lake runs about 159 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
MeasuredRoy Lake sits in USDA hardiness zone 3b.
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 Roy Lake is in
Roy Lake sits in the Northern Lakes and Forests — EPA Level III, inside the wider Northern Forests. That is read at Roy Lake's own centroid rather than borrowed from Clearwater County.
What Grows in Roy Lake
Every plant below cleared Roy Lake's own zone 3b and its 159-day season. Each card opens that plant's Minnesota profile. How we score.
Is it too late to plant in Roy Lake?
Usually not — gardeners here simply switch what goes in the ground as the season moves. Cool-season crops can go in from around Apr 5; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near May 3 (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. 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 Roy Lake
Closest first, within ~10 miles of Roy Lake. Listing isn't leaking, and distance isn't exposure.
- MM08 144N39W02AAABBD01 0000124504Nitrate · 1.8 mi
- 145N39W16DAD 01 E GitzNitrate · 4.8 mi
- NAYTAHWAUSH COMMUNITY CHARTER SCHOOLBrownfields · 5.7 mi
- 520679Nitrate · 6.1 mi
- Pinehurst ResortUnderground Storage Tanks · 6.4 mi
- Village StoreUnderground Storage Tanks · 6.4 mi
- Bureau Of Indian AffairsUnderground Storage Tanks · 6.4 mi
- Westside Express IncUnderground Storage Tanks · 6.6 mi
- Triangle Sales & ServiceUnderground Storage Tanks · 6.6 mi
- Larson Store (porters Addn)Underground Storage Tanks · 6.6 mi
- Burlington Northern Railroad-mainlineUnderground Storage Tanks · 6.6 mi
- Bagley JunctionUnderground Storage Tanks · 6.6 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Roy Lake'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 Roy Lake.
Sources Checked
within ~10 miles of Roy Lake
Severity Distribution
within ~10 miles of Roy Lake
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Roy Lake, Nitrate runs higher than the national average — 16 sites within ~10 miles of Roy Lake. 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 Roy Lake
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 Roy Lake average
Your land is one point inside Roy Lake
Everything above resolves to Roy Lake as a whole — one PHZM band and one 28°F frost record, read across 287 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 Roy Lake Average
Roy Lake Average
- ●USDA Zones 3b, averaged across Roy Lake
- ●One soil character for all of Roy Lake
- ●Frost dates read at Roy Lake's scale: May 3 to Oct 9
YOUR Parcel
- ✓Your exact zone, not Roy Lake's 3b
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Roy Lake
Pull a site-specific report for your exact address in Roy Lake, Minnesota — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Roy Lake averages can't show:
We read public map data around Roy Lake — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Roy Lake average
How we know this about Roy Lake
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 Roy Lake’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 Roy Lake
When does frost risk typically end in Roy Lake?
The last hard freeze (28°F) in Roy Lake typically lands around May 3, 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 24.
When is the first frost in Roy Lake?
The first hard freeze (28°F) in Roy Lake 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 159 days after the spring freeze cleared.
How long is the growing season in Roy Lake?
Measured between 28°F hard freezes, Roy Lake sees about 159 frost-free days — roughly May 3 through Oct 9, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer May 24 to Sep 25, about 124 days.
Is the soil safe to grow vegetables in Roy Lake?
The federal record around Roy Lake is light — 36 documented sites across the 9 federal source types we checked, mostly Underground Storage Tanks entries (19), the nearest Nitrate record about 1.8 miles out — and proximity to a documented site is information, not a diagnosis of any one yard. Growing food here starts from a strong position; a soil test before new food beds settles any site-specific question.
How do I protect my plants from frost in Roy Lake?
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 Roy Lake's scale — its 3b band and its 159-day season. Your yard writes its own version of Roy Lake'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 Roy Lake’s own scale
6 of the readings below were taken at Roy Lake's own scale — its own ~159-day season between 28°F freezes, the 287 acres it covers and 36 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Roy Lake's own USDA hardiness band, zones 3bUSDA PHZM 2023
- Roy Lake's own 28°F hard-freeze dates, about May 3 and Oct 9 and the ~159-day span between themNOAA 1991–2020 Climate Normals
- 36 documented contamination sites on the federal record near Roy Lake, the closest Nitrate record about 1.8 miles out from the town centreFederal environmental registers
- Roy Lake's boundary and the 287 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 3b and a ~159-day seasonGrowable Ground crop-matching engine
- The ecoregion at Roy Lake's own centroid, the Northern Lakes and ForestsUS EPA Level III Ecoregions
Inherited from a wider read
- Soil character — no town-scale survey exists, so Roy Lake's 287 acres read through its county's SSURGO summaryfrom Clearwater County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Clearwater 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 Clearwater County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Roy Lake's 287 acreswhy one lot differs from the next →
- Which side of Roy Lake you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 287 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Nitrate record about 1.8 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 Roy Lake-wide figureread your own land →
More in Minnesota
Wider growing context
What grows across MinnesotaRoy Lake sits outside our named growing regions, so Minnesota as a whole is its closest context here.
Nearby growing guides