Annapolis, Illinois, sits in USDA hardiness zone 6b — a zone band wide enough that plant choice, not possibility, is the interesting question.
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 Annapolis, 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 Annapolis 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 Annapolis — soil, climate, flood, and parcel records. How we handle your address.
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Annapolis — the short answer
Annapolis, Illinois: USDA zone 6b, about 215 days between hard freezes, across 225 acres of town.
- USDA zone
- 6b
- 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 2
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~215
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Town area
- 225 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 Annapolis's average, not your lot's — a low corner or a tree line moves it. Against Annapolis's 215-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Annapolis
Each reading below is measured for Annapolis itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredAnnapolis runs about 215 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
MeasuredAnnapolis 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 Annapolis is in
Annapolis sits in the Interior River Valleys and Hills — EPA Level III, inside the wider Eastern Temperate Forests. That is read at Annapolis's own centroid rather than borrowed from Crawford County.
What Grows in Annapolis
Every plant below cleared Annapolis's own zone 6b and its 215-day season. Each card opens that plant's Illinois profile. How we score.
Is it too late to plant in Annapolis?
Almost never — the real question is what to plant next. 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 2 — long-season crops need about 90 days of runway, quick greens only 30. A long window like this one runs successions deep into fall — and even its last weeks take quick greens and garlic.
Documented around Annapolis
Survey cells within 31 miles of Annapolis checked for spotted lanternfly, none carrying a detection — a surveyed negative, not an absence of looking. Nearest documented record 134 miles off. What to watch for.
What's on the federal record near Annapolis
Closest first, within ~10 miles of Annapolis. Listing isn't leaking, and distance isn't exposure.
- Thompson Chemicals IncUnderground Storage Tanks · 900 ft
- Rondell Napiers GarageUnderground Storage Tanks · 900 ft
- ST. CLAIR OIL SITESuperfund · 2.7 mi
- Ackman RichardUnderground Storage Tanks · 6.2 mi
- 6 miles W of AnnapolisNitrate · 6.2 mi
- 8 miles SE of MartinsvilleNitrate · 6.4 mi
- 4 miles SW of West YorkNitrate · 6.9 mi
- Crawford Food Ser IncUnderground Storage Tanks · 7.4 mi
- Bunker Hill Supply Co., Inc.Underground Storage Tanks · 7.6 mi
- AMEREN - HUTSONVILLE POWER STATIONToxics Release Inventory · 8.2 mi
- SIMPSON FAMILY FARMSCAFO · 8.2 mi
- 10.5 miles SW of MarshallNitrate · 8.5 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Annapolis'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 Annapolis.
Total Sites
41
within ~10 miles of Annapolis
Risk Level
Elevated
Highest-severity
1 Superfund site (none NPL-listed)
Sources Checked
within ~10 miles of Annapolis
Severity Distribution
within ~10 miles of Annapolis
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Annapolis, Underground Storage Tanks runs higher than the national average — 29 sites within ~10 miles of Annapolis. That's not a problem with your land — it's information about 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 Annapolis
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 Annapolis average
Your land is one point inside Annapolis
Everything above resolves to Annapolis as a whole — one PHZM band and one 28°F frost record, read across 225 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 Annapolis Average
Annapolis Average
- ●USDA Zones 6b, averaged across Annapolis
- ●One soil character for all of Annapolis
- ●Frost dates read at Annapolis's scale: Apr 1 to Nov 2
YOUR Parcel
- ✓Your exact zone, not Annapolis's 6b
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Annapolis
Pull a site-specific report for your exact address in Annapolis, Illinois — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Annapolis averages can't show:
We read public map data around Annapolis — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Annapolis average
How we know this about Annapolis
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 Annapolis’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 Annapolis
When does frost risk typically end in Annapolis?
The last hard freeze (28°F) in Annapolis 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 Annapolis?
The first hard freeze (28°F) in Annapolis typically arrives around Nov 2, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Oct 19, so the watching starts about Oct 3 — about 215 days after the spring freeze cleared.
How long is the growing season in Annapolis?
Measured between 28°F hard freezes, Annapolis sees about 215 frost-free days — roughly Apr 1 through Nov 2, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Apr 22 to Oct 19, about 180 days.
Is the soil safe to grow vegetables in Annapolis?
The federal record around Annapolis is a meaningful one — 41 documented sites, mostly Underground Storage Tanks entries (29), the nearest Underground Storage Tanks record about 0.2 miles 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 Annapolis?
From about Oct 3 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 2 (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 2. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Annapolis's scale — its 6b band and its 215-day season. Your yard writes its own version of Annapolis'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 Annapolis’s own scale
7 of the readings below were taken at Annapolis's own scale — its own ~215-day season between 28°F freezes, the 225 acres it covers and 41 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Annapolis's own USDA hardiness band, zones 6bUSDA PHZM 2023
- Annapolis's own 28°F hard-freeze dates, about Apr 1 and Nov 2 and the ~215-day span between themNOAA 1991–2020 Climate Normals
- 41 documented contamination sites on the federal record near Annapolis, the closest Underground Storage Tanks record about 0.2 miles out from the town centreFederal environmental registers
- Annapolis's boundary and the 225 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 6b and a ~215-day seasonGrowable Ground crop-matching engine
- The ecoregion at Annapolis's own centroid, the Interior River Valleys and HillsUS EPA Level III Ecoregions
- Lanternfly survey cells around Annapolis 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 Annapolis's 225 acres read through its county's SSURGO summaryfrom Crawford County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Crawford 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 Crawford County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Annapolis's 225 acreswhy one lot differs from the next →
- Which side of Annapolis you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 225 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Underground Storage Tanks record about 0.2 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 Annapolis-wide figureread your own land →
More in Illinois
Wider growing context
What grows across IllinoisAnnapolis sits outside our named growing regions, so Illinois as a whole is its closest context here.
Nearby growing guides