Browns, Illinois, sits in USDA hardiness zone 6b — room for a real mix of vegetables, fruit, and perennials matched to the local frost calendar.
The conditions favor cabbage, hazelnut, lavender, and collard greens, among others — though every individual site edits that list with its own soil, sun, and drainage.
Even in Browns, 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 Browns 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 Browns — soil, climate, flood, and parcel records. How we handle your address.
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Browns — the short answer
Browns, Illinois: USDA zone 6b, about 220 days between hard freezes, across 186 acres of town.
- USDA zone
- 6b
- USDA PHZM 2023
- Last hard freeze (28°F)
- Mar 30
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Nov 5
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~220
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Town area
- 186 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 6b is Browns's average, not your lot's — a low corner or a tree line moves it. Against Browns's 220-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Browns
Each reading below is measured for Browns itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredBrowns runs about 220 days between hard freezes — a long growing season.
There is slack for succession plantings and slow-finishing crops: many vegetables can be sown twice, and the heat-lovers have time to ripen fully.
Plan a second sowing of quick crops after the first comes out, and use the fall window most gardeners let sit idle.
NOAA 1991–2020 Climate Normals
Winter hardiness
MeasuredBrowns sits in USDA hardiness zone 6b.
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 Browns is in
Browns sits in the Interior River Valleys and Hills — EPA Level III, inside the wider Eastern Temperate Forests. That is read at Browns's own centroid rather than borrowed from Edwards County.
What Grows in Browns
Every plant below cleared Browns's own zone 6b and its 220-day season. Each card opens that plant's Illinois profile. How we score.
Is it too late to plant in Browns?
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 2; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Mar 30 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Nov 5 — long-season crops need about 90 days of runway, quick greens only 30. There is slack in a calendar like this — late plantings, second rounds of favorites, and a fall bench that keeps beds working.
Documented around Browns
Survey cells within 31 miles of Browns checked for spotted lanternfly, none carrying a detection — a surveyed negative, not an absence of looking. Nearest documented record 166 miles off. What to watch for.
What's on the federal record near Browns
Closest first, within ~10 miles of Browns. Listing isn't leaking, and distance isn't exposure.
- Chemical Fertilizer SerUnderground Storage Tanks · 500 ft
- Nelson DwightUnderground Storage Tanks · 500 ft
- Browns PlantUnderground Storage Tanks · 500 ft
- CROP PRODUCTIONBrownfields · 650 ft
- Midwest WasteUnderground Storage Tanks · 0.5 mi
- United Agri - Chemical Products (UAP) RichterUnderground Storage Tanks · 0.5 mi
- Bellessa Auto PlazaUnderground Storage Tanks · 3.6 mi
- SYDENSTRICKER NOBBE PARTNERSBrownfields · 3.6 mi
- CHAMPION LABORATORIES INCBrownfields · 3.9 mi
- CHAMPION LABORATORIES INCToxics Release Inventory · 3.9 mi
- Lewis Hering Elevator CoUnderground Storage Tanks · 3.9 mi
- D&M Dunns 66Underground Storage Tanks · 3.9 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Browns'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 Browns.
Total Sites
92
within ~10 miles of Browns
Risk Level
Moderate
Highest-severity
4 Toxics Release Inventory facilities
Sources Checked
within ~10 miles of Browns
Severity Distribution
within ~10 miles of Browns
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Browns, Underground Storage Tanks runs higher than the national average — 66 sites within ~10 miles of Browns. Knowing it is half the work — and it's nothing a thoughtful grower can't plan for.
Underground Storage Tanks: Underground storage tanks are the single most common source of soil contamination near homes and gardens.
Use raised beds with imported soil — this eliminates the primary soil-contact pathway.
Check your specific parcel in Browns
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 Browns average
Your land is one point inside Browns
Everything above resolves to Browns as a whole — one PHZM band and one 28°F frost record, read across 186 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 Browns Average
Browns Average
- ●USDA Zones 6b, averaged across Browns
- ●One soil character for all of Browns
- ●Frost dates read at Browns's scale: Mar 30 to Nov 5
YOUR Parcel
- ✓Your exact zone, not Browns's 6b
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Browns
Pull a site-specific report for your exact address in Browns, Illinois — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Browns averages can't show:
We read public map data around Browns — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Browns average
How we know this about Browns
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 Browns’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 Browns
When does frost risk typically end in Browns?
The last hard freeze (28°F) in Browns typically lands around Mar 30, 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 Apr 20.
When is the first frost in Browns?
The first hard freeze (28°F) in Browns typically arrives around Nov 5, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Oct 22, so the watching starts about Oct 6 — about 220 days after the spring freeze cleared.
How long is the growing season in Browns?
Measured between 28°F hard freezes, Browns sees about 220 frost-free days — roughly Mar 30 through Nov 5, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Apr 20 to Oct 22, about 185 days.
Is the soil safe to grow vegetables in Browns?
The federal record around Browns shows 92 documented sites, mostly Underground Storage Tanks entries (66), the nearest Underground Storage Tanks 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 Browns?
From about Oct 6 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 Nov 5 (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 Nov 5. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Browns's scale — its 6b band and its 220-day season. Your yard writes its own version of Browns'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 Browns’s own scale
7 of the readings below were taken at Browns's own scale — its own ~220-day season between 28°F freezes, the 186 acres it covers and 92 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Browns's own USDA hardiness band, zones 6bUSDA PHZM 2023
- Browns's own 28°F hard-freeze dates, about Mar 30 and Nov 5 and the ~220-day span between themNOAA 1991–2020 Climate Normals
- 92 documented contamination sites on the federal record near Browns, the closest Underground Storage Tanks record under a tenth of a mile out from the town centreFederal environmental registers
- Browns's boundary and the 186 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 6b and a ~220-day seasonGrowable Ground crop-matching engine
- The ecoregion at Browns's own centroid, the Interior River Valleys and HillsUS EPA Level III Ecoregions
- Lanternfly survey cells around Browns checked, none carrying a detectionlydemapr (De Bona & Helmus), 10 km survey lattice
Inherited from a wider read
- Soil character — no town-scale survey exists, so Browns's 186 acres read through its county's SSURGO summaryfrom Edwards County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Edwards County
- The growing challenges every Illinois grower plans around — written at state scale, so they stay on the state guidefrom Illinois
- Butterfly and beetle records, and the farmland pesticide estimate — all published county-widefrom Edwards County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Browns's 186 acreswhy one lot differs from the next →
- Which side of Browns you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 186 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 Browns-wide figureread your own land →
More in Illinois
Wider growing context
What grows across IllinoisBrowns sits outside our named growing regions, so Illinois as a whole is its closest context here.