Blue Mound, Illinois, sits in USDA hardiness zone 6a — a band that supports both cool-season staples and warm-season crops chosen to fit the local frost window.
On paper, cabbage, hazelnut, lavender, and collard greens all suit these conditions — on the ground, soil, sun, and drainage make the final call.
Even in Blue Mound, 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 Blue Mound 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 Blue Mound — soil, climate, flood, and parcel records. How we handle your address.
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Blue Mound — the short answer
Blue Mound, Illinois: USDA zone 6a, about 214 days between hard freezes, across 374 acres of town.
- USDA zone
- 6a
- USDA PHZM 2023
- Last hard freeze (28°F)
- Apr 1
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Nov 1
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~214
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Town area
- 374 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 6a is Blue Mound's average, not your lot's — a low corner or a tree line moves it. Against Blue Mound's 214-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Blue Mound
Each reading below is measured for Blue Mound itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredBlue Mound runs about 214 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
MeasuredBlue Mound sits in USDA hardiness zone 6a.
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 Blue Mound is in
Blue Mound sits in the Central Corn Belt Plains — EPA Level III, inside the wider Eastern Temperate Forests. That is read at Blue Mound's own centroid rather than borrowed from Macon County.
What Grows in Blue Mound
Every plant below cleared Blue Mound's own zone 6a and its 214-day season. Each card opens that plant's Illinois profile. How we score.
Is it too late to plant in Blue Mound?
Usually not — gardeners here simply switch what goes in the ground as the season moves. Cool-season crops can go in from around Mar 4; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Apr 1 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Nov 1 — 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.
What's on the federal record near Blue Mound
Closest first, within ~10 miles of Blue Mound. Listing isn't leaking, and distance isn't exposure.
- Pleasant View Township OfUnderground Storage Tanks · 500 ft
- Casey's General Store #1760Underground Storage Tanks · 1100 ft
- BLUE MOUND AUTOBODYBrownfields · 1100 ft
- SCG Blue Mound DivUnderground Storage Tanks · 1600 ft
- Blue Mound Boody School Dist. 10Underground Storage Tanks · 2000 ft
- Midwest Petroleum CompanyUnderground Storage Tanks · 0.8 mi
- BLUE MOUND AUTOBODY & SERVICEBrownfields · 0.8 mi
- EXPLORER PIPELINE COBrownfields · 3.2 mi
- Remmert GarageUnderground Storage Tanks · 5.6 mi
- Casey's General Store #3612Underground Storage Tanks · 5.6 mi
- Village Pantry #1201Underground Storage Tanks · 5.7 mi
- Prairieland Fertilizer IncUnderground Storage Tanks · 5.7 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Blue Mound'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 Blue Mound.
Total Sites
65
within ~10 miles of Blue Mound
Risk Level
Elevated
Highest-severity
2 Superfund sites (none NPL-listed)
Sources Checked
within ~10 miles of Blue Mound
Severity Distribution
within ~10 miles of Blue Mound
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Blue Mound, Underground Storage Tanks runs higher than the national average — 45 sites within ~10 miles of Blue Mound. It's not cause for alarm — it's worth knowing, and there's a sensible way to grow around it.
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 Blue Mound
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 Blue Mound average
Your land is one point inside Blue Mound
Everything above resolves to Blue Mound as a whole — one PHZM band and one 28°F frost record, read across 374 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 Blue Mound Average
Blue Mound Average
- ●USDA Zones 6a, averaged across Blue Mound
- ●One soil character for all of Blue Mound
- ●Frost dates read at Blue Mound's scale: Apr 1 to Nov 1
YOUR Parcel
- ✓Your exact zone, not Blue Mound's 6a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Blue Mound
Pull a site-specific report for your exact address in Blue Mound, Illinois — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Blue Mound averages can't show:
We read public map data around Blue Mound — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Blue Mound average
How we know this about Blue Mound
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 Blue Mound’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 Blue Mound
When does frost risk typically end in Blue Mound?
The last hard freeze (28°F) in Blue Mound typically lands around Apr 1, 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 22.
When is the first frost in Blue Mound?
The first hard freeze (28°F) in Blue Mound typically arrives around Nov 1, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Oct 18, so the watching starts about Oct 2 — about 214 days after the spring freeze cleared.
How long is the growing season in Blue Mound?
Measured between 28°F hard freezes, Blue Mound sees about 214 frost-free days — roughly Apr 1 through Nov 1, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Apr 22 to Oct 18, about 179 days.
Is the soil safe to grow vegetables in Blue Mound?
The federal record around Blue Mound is a meaningful one — 65 documented sites, mostly Underground Storage Tanks entries (45), 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 Blue Mound?
From about Oct 2 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 1 (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 1. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Blue Mound's scale — its 6a band and its 214-day season. Your yard writes its own version of Blue Mound'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 Blue Mound’s own scale
6 of the readings below were taken at Blue Mound's own scale — its own ~214-day season between 28°F freezes, the 374 acres it covers and 65 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Blue Mound's own USDA hardiness band, zones 6aUSDA PHZM 2023
- Blue Mound's own 28°F hard-freeze dates, about Apr 1 and Nov 1 and the ~214-day span between themNOAA 1991–2020 Climate Normals
- 65 documented contamination sites on the federal record near Blue Mound, the closest Underground Storage Tanks record under a tenth of a mile out from the town centreFederal environmental registers
- Blue Mound's boundary and the 374 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 6a and a ~214-day seasonGrowable Ground crop-matching engine
- The ecoregion at Blue Mound's own centroid, the Central Corn Belt PlainsUS EPA Level III Ecoregions
Inherited from a wider read
- Soil character — no town-scale survey exists, so Blue Mound's 374 acres read through its county's SSURGO summaryfrom Macon County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Macon 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 Macon County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Blue Mound's 374 acreswhy one lot differs from the next →
- Which side of Blue Mound you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 374 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 Blue Mound-wide figureread your own land →
More in Illinois
Wider growing context
What grows across IllinoisBlue Mound sits outside our named growing regions, so Illinois as a whole is its closest context here.
Nearby growing guides