Ada, Minnesota, sits in USDA hardiness zone 4a — a band that supports both cool-season staples and warm-season crops chosen to fit the local frost window.
Expect cabbage, cranberry, turkish rocket, and collard greens to be strong candidates here; the deciding factors on any one parcel stay local — soil, sun, and drainage.
Even in Ada, 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 Ada 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 Ada — soil, climate, flood, and parcel records. How we handle your address.
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Ada — the short answer
Ada, Minnesota: USDA zone 4a, about 165 days between hard freezes, across 858 acres of city.
- USDA zone
- 4a
- USDA PHZM 2023
- Last hard freeze (28°F)
- Apr 28
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Oct 10
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~165
- NOAA 1991–2020 Climate Normals, 28°F — this town
- City area
- 858 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 Ada's average, not your lot's — a low corner or a tree line moves it. Against Ada's 165-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Ada
Each reading below is measured for Ada itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredAda runs about 165 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
MeasuredAda 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 Ada is in
Ada sits in the Lake Agassiz Plain — EPA Level III, inside the wider Great Plains. That is read at Ada's own centroid rather than borrowed from Norman County.
What Grows in Ada
Every plant below cleared Ada's own zone 4a and its 165-day season. Each card opens that plant's Minnesota profile. How we score.
Is it too late to plant in Ada?
Usually not — gardeners here simply switch what goes in the ground as the season moves. Cool-season crops can go in from around Mar 31; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Apr 28 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Oct 10 — long-season crops need about 90 days of runway, quick greens only 30. Even past midsummer there is room for a true fall garden here, and garlic planted near the close carries the momentum into next year.
What's on the federal record near Ada
Closest first, within ~10 miles of Ada. Listing isn't leaking, and distance isn't exposure.
- THRIFTY DRUG STORES INCBrownfields · 350 ft
- Ada Beltrami Co-op AssociationUnderground Storage Tanks · 500 ft
- ADA BELTRAMI CO-OP ASSOCIATIONBrownfields · 500 ft
- PRAIRIE DENTAL CENTER PABrownfields · 650 ft
- NORMAN COUNTY SHERIFF'S OFFICEBrownfields · 700 ft
- JEFFS AUTO BODY REPAIRBrownfields · 700 ft
- LEE BROS INCBrownfields · 800 ft
- Anderson StandardUnderground Storage Tanks · 950 ft
- 144N46W09CBA 01 City Of AdaNitrate · 1000 ft
- DOLLAR GENERAL 16285Brownfields · 1000 ft
- Petro Serve USA #52Underground Storage Tanks · 1200 ft
- Ada Country StoreUnderground Storage Tanks · 1200 ft
6 more sites are on the record inside the same radius. See them on the map
Measured from Ada'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 Ada.
Total Sites
51
within ~10 miles of Ada
Risk Level
Moderate
Highest-severity
4 concentrated animal feeding operations
Sources Checked
within ~10 miles of Ada
Severity Distribution
within ~10 miles of Ada
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Ada, two things run higher than the national average within ~10 miles of Ada — CAFO (4 sites) and Nitrate (16 sites). It's not cause for alarm — it's worth knowing, and there's a sensible way to grow around it.
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 Ada
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 Ada average
Your land is one point inside Ada
Everything above resolves to Ada as a whole — one PHZM band and one 28°F frost record, read across 858 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 Ada Average
Ada Average
- ●USDA Zones 4a, averaged across Ada
- ●One soil character for all of Ada
- ●Frost dates read at Ada's scale: Apr 28 to Oct 10
YOUR Parcel
- ✓Your exact zone, not Ada's 4a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Ada
Pull a site-specific report for your exact address in Ada, Minnesota — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Ada averages can't show:
We read public map data around Ada — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Ada average
How we know this about Ada
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 Ada’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 Ada
When does frost risk typically end in Ada?
The last hard freeze (28°F) in Ada typically lands around Apr 28, 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 19.
When is the first frost in Ada?
The first hard freeze (28°F) in Ada typically arrives around Oct 10, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Sep 26, so the watching starts about Sep 10 — about 165 days after the spring freeze cleared.
How long is the growing season in Ada?
Measured between 28°F hard freezes, Ada sees about 165 frost-free days — roughly Apr 28 through Oct 10, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer May 19 to Sep 26, about 130 days.
Is the soil safe to grow vegetables in Ada?
The federal record around Ada shows 51 documented sites, mostly Brownfields entries (18), the nearest Brownfields record under a tenth of a mile out — a typical footprint for a growing area, and proximity to a documented site is information, not a diagnosis of any one yard. It's worth seeing which recorded sites sit closest to where you grow, and testing the soil before new food beds near any of them.
How do I protect my plants from frost in Ada?
From about Sep 10 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 10 (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 10. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Ada's scale — its 4a band and its 165-day season. Your yard writes its own version of Ada'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 Ada’s own scale
6 of the readings below were taken at Ada's own scale — its own ~165-day season between 28°F freezes, the 858 acres it covers and 51 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Ada's own USDA hardiness band, zones 4aUSDA PHZM 2023
- Ada's own 28°F hard-freeze dates, about Apr 28 and Oct 10 and the ~165-day span between themNOAA 1991–2020 Climate Normals
- 51 documented contamination sites on the federal record near Ada, the closest Brownfields record under a tenth of a mile out from the town centreFederal environmental registers
- Ada's boundary and the 858 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 4a and a ~165-day seasonGrowable Ground crop-matching engine
- The ecoregion at Ada's own centroid, the Lake Agassiz PlainUS EPA Level III Ecoregions
Inherited from a wider read
- Soil character — no town-scale survey exists, so Ada's 858 acres read through its county's SSURGO summaryfrom Norman County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Norman 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 Norman County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Ada's 858 acreswhy one lot differs from the next →
- Which side of Ada you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 858 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 Ada-wide figureread your own land →
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