Lake Crystal, Minnesota, sits in USDA hardiness zone 5a — a zone band wide enough that plant choice, not possibility, is the interesting question.
Among the crops suited to this profile: cabbage, cranberry, lavender, and collard greens. The site-level story — soil, sun, drainage — decides the rest.
Even in Lake Crystal, 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 Lake Crystal 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 Lake Crystal — soil, climate, flood, and parcel records. How we handle your address.
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Lake Crystal — the short answer
Lake Crystal, Minnesota: USDA zone 5a, about 185 days between hard freezes, across 1K acres of city.
- USDA zone
- 5a
- USDA PHZM 2023
- Last hard freeze (28°F)
- Apr 17
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Oct 19
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~185
- NOAA 1991–2020 Climate Normals, 28°F — this town
- City area
- 1K 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 Lake Crystal's average, not your lot's — a low corner or a tree line moves it. Against Lake Crystal's 185-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Lake Crystal
Each reading below is measured for Lake Crystal itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredLake Crystal runs about 185 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
MeasuredLake Crystal 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 Lake Crystal is in
Lake Crystal sits in the Western Corn Belt Plains — EPA Level III, inside the wider Great Plains. That is read at Lake Crystal's own centroid rather than borrowed from Blue Earth County.
What Grows in Lake Crystal
Every plant below cleared Lake Crystal's own zone 5a and its 185-day season. Each card opens that plant's Minnesota profile. How we score.
Is it too late to plant in Lake Crystal?
Usually not — gardeners here simply switch what goes in the ground as the season moves. Cool-season crops can go in from around Mar 20; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Apr 17 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Oct 19 — 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 Lake Crystal
Closest first, within ~10 miles of Lake Crystal. Listing isn't leaking, and distance isn't exposure.
- KROUBETZ AUTO BODY INCBrownfields · 250 ft
- WILLIAMS GARAGEBrownfields · 350 ft
- LAKE CRYSTAL CLINIC- MADELIA HEALTHBrownfields · 500 ft
- PARKVIEW MEDICAL CLINIC - LAKBrownfields · 500 ft
- LAKE CRYSTAL UTILITIES COMMISSIONBrownfields · 550 ft
- Kroubetz Ford Inc.Underground Storage Tanks · 550 ft
- Crystal Valley Coop Gas Station CardtrolUnderground Storage Tanks · 800 ft
- CRYSTAL VALLEY COOPERATIVE - LOC 1Brownfields · 800 ft
- DONALD CAMPBELL DDSBrownfields · 850 ft
- SALISBURY ELECTRONIC RECYCLINGBrownfields · 1100 ft
- HONSTAD REPAIRBrownfields · 1100 ft
- CRYSTAL SEASONS LIVING CENTERBrownfields · 1200 ft
6 more sites are on the record inside the same radius. See them on the map
Measured from Lake Crystal'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 Lake Crystal.
Sources Checked
within ~10 miles of Lake Crystal
Severity Distribution
within ~10 miles of Lake Crystal
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Lake Crystal, two things run higher than the national average within ~10 miles of Lake Crystal — CAFO (14 sites) and Nitrate (90 sites). Knowing it is half the work — and it's nothing a thoughtful grower can't plan for.
CAFO: CAFOs pose a different contamination profile than chemical sources.
Nitrate: Nitrate contamination primarily comes from agricultural fertilizer runoff and failing septic systems.
Wash all produce consumed raw thoroughly, especially leafy greens grown near CAFOs.
Test well water for nitrate if you rely on a private well for irrigation (EPA standard: 10 mg/L).
Check your specific parcel in Lake Crystal
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 Lake Crystal average
Your land is one point inside Lake Crystal
Everything above resolves to Lake Crystal as a whole — one PHZM band and one 28°F frost record, read across 1K 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 Lake Crystal Average
Lake Crystal Average
- ●USDA Zones 5a, averaged across Lake Crystal
- ●One soil character for all of Lake Crystal
- ●Frost dates read at Lake Crystal's scale: Apr 17 to Oct 19
YOUR Parcel
- ✓Your exact zone, not Lake Crystal's 5a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Lake Crystal
Pull a site-specific report for your exact address in Lake Crystal, Minnesota — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Lake Crystal averages can't show:
We read public map data around Lake Crystal — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Lake Crystal average
How we know this about Lake Crystal
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 Lake Crystal’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 Lake Crystal
When does frost risk typically end in Lake Crystal?
The last hard freeze (28°F) in Lake Crystal typically lands around Apr 17, 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 8.
When is the first frost in Lake Crystal?
The first hard freeze (28°F) in Lake Crystal typically arrives around Oct 19, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Oct 5, so the watching starts about Sep 19 — about 185 days after the spring freeze cleared.
How long is the growing season in Lake Crystal?
Measured between 28°F hard freezes, Lake Crystal sees about 185 frost-free days — roughly Apr 17 through Oct 19, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer May 8 to Oct 5, about 150 days.
Is the soil safe to grow vegetables in Lake Crystal?
The federal record around Lake Crystal is a meaningful one — 233 documented sites, mostly Nitrate entries (90), the nearest Brownfields 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 Lake Crystal?
From about Sep 19 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 19 (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 19. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Lake Crystal's scale — its 5a band and its 185-day season. Your yard writes its own version of Lake Crystal'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 Lake Crystal’s own scale
6 of the readings below were taken at Lake Crystal's own scale — its own ~185-day season between 28°F freezes, the 1,092 acres it covers and 233 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Lake Crystal's own USDA hardiness band, zones 5aUSDA PHZM 2023
- Lake Crystal's own 28°F hard-freeze dates, about Apr 17 and Oct 19 and the ~185-day span between themNOAA 1991–2020 Climate Normals
- 233 documented contamination sites on the federal record near Lake Crystal, the closest Brownfields record under a tenth of a mile out from the town centreFederal environmental registers
- Lake Crystal's boundary and the 1,092 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 5a and a ~185-day seasonGrowable Ground crop-matching engine
- The ecoregion at Lake Crystal's own centroid, the Western Corn Belt PlainsUS EPA Level III Ecoregions
Inherited from a wider read
- Soil character — no town-scale survey exists, so Lake Crystal's 1,092 acres read through its county's SSURGO summaryfrom Blue Earth County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Blue Earth 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 Blue Earth County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Lake Crystal's 1,092 acreswhy one lot differs from the next →
- Which side of Lake Crystal you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 1,092 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Brownfields 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 Lake Crystal-wide figureread your own land →
More in Minnesota
Wider growing context
What grows across MinnesotaLake Crystal sits outside our named growing regions, so Minnesota as a whole is its closest context here.
Nearby growing guides