Door County spans USDA hardiness zone 5b — room for a real mix of vegetables, fruit, and perennials matched to the local frost calendar.
A Lake Michigan and Green Bay peninsula whose water-moderated climate holds a roughly 201-day frost-free season in USDA zone 5b — about two and a half weeks longer than inland Brown County just to the south. A short list that earns its place here — potato, cranberry, cherry, and sugar maple — with any one site's soil, sun, and drainage making the final cut.
Door County spans Wisconsin.
Your yard isn't all of Door County.
Door County spans USDA zones 5b, but your parcel sits in exactly one — and slope, tree cover, and low spots nudge it further. 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 Door County — soil, climate, flood, and parcel records. How we handle your address.
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Door County — the short answer
Door County: USDA zones 5b, 201 frost-free days, in Wisconsin.
- USDA zones
- 5b
- USDA PHZM 2023, aggregated over the footprint
- Frost-free season
- 201 days
- NOAA Regional Climate Centers ACIS, 1991–2020
- Counties
- 1
- US Census TIGER/Line 2025
- Region type
- County cluster
- Growable Ground growing-region registry
Region boundary: Growable Ground growing-region registry — curated county clusters, EPA Level III ecoregions, and town clusters drawn finer than any county. Where a region publishes no measured season, no season figure is shown.
Hardiness Zone Range
What Grows in Door County
Plants matched to Door County's USDA zones 5b, ordered by how much hardiness margin each has across the region — the ones with room to spare at both ends of this band lead. Each links to its full growing profile.
Native Plants of Door County
Plants the USDA PLANTS Database documents as native and present in this region’s state, kept only where the published hardiness range meets Door County’s USDA zones 5b — closest range match first. Presence is recorded by state, so a plant can be documented across the state and still be scarce in your corner of the region.
The ground across Door County
The USDA soil survey maps this ground county by county. These are those records weighted by land area across one member county — this region’s own profile, not a state figure.
The ground is predominantly Alfisols, at 38% of mapped acres, followed by Inceptisols (18%), Spodosols (17%) and Mollisols (16%). Six soil orders appear somewhere inside the footprint, which is the honest reason a regional soil answer only goes so far. The most extensive named soils are Summerville, Longrie, and Omena.
66% of those acres are well drained, and another 13% somewhat poorly drained, 9% very poorly drained. Topsoil pH runs 6.5–7.2 in that county’s own record. 26% of the footprint is classed prime farmland.
Soil order
Alfisols
Drainage
Well drained
Topsoil pH
6.5–7.2
Hydric soils
16%
Soil changes across a driveway, so which of these your own ground sits on is a parcel question rather than a regional one. soil types explained.
USDA NRCS SSURGO via Soil Data Access
What this means for growing in Door County
The soil survey reads this ground county by county, and the readings above are those records summed across Door County. Here is what they mean for a garden here — and the move an experienced grower makes about each one.
Drainage
From county records66% of the mapped acres across Door County are well drained — ground that drains quickly. That is area-weighted across its one mapped county.
The upside is soil you can work early in spring and roots that never drown; the cost is that fast-draining ground dries out fast and leaches nutrients away before plants can use them.
Work in compost and mulch to hold moisture and feed, and water more often in short doses than deep and rarely.
USDA NRCS SSURGO
Surface pH
From county recordsTopsoil across Door County runs pH 6.5–7.2 — near neutral in the one record covering it.
This is the range most vegetables prefer — one correction you probably do not have to make, which is genuinely good news for a new bed.
Keep it there with compost rather than lime or sulfur, and only amend if your own soil test says otherwise.
USDA NRCS SSURGO
Wet ground
From county recordsAbout 16% of the ground across Door County is mapped as hydric — wetland — soil.
If your lot falls in one of those pockets, a standard in-ground bed will fight waterlogging all season, and roots that need air will struggle.
Check how your own ground drains before you dig; raised beds or moisture-loving plantings turn a wet corner from a problem into a niche.
USDA NRCS SSURGO
Safe to Grow Here?
What the federal record shows across Door County — and how to grow with it.
Across Door County's 1 county the federal record holds 477 documented sites, mostly Underground Storage Tanks (320), Nitrate (76) and Brownfields (69). The heaviest single county is Door County, with 477.
That is a regional count, not a reading of any one lot — proximity to a documented site is information, not a diagnosis. Open the map outlined to Door County to see which records sit where you actually grow.
Sources Checked
Summed across the county in Door County
A note from Gnorman
What an experienced grower watches for around here
In and around Door County, Underground Storage Tanks runs higher than the national average — 320 sites across the county in Door County. 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.
Sources: EPA, USGS — 1.8M documented sites tracked nationwide across 9 federal source types.
Your land is one point inside Door County
Everything above resolves to Door County as a whole — a footprint spanning USDA zones 5b. Your parcel sits in exactly one of them. 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 region 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 regional average.
Your Lot vs Door County Average
Door County Average
- ●USDA Zones 5b, averaged across Door County
- ●One soil character for all of Door County
- ●State-average frost dates
YOUR Parcel
- ✓Your exact zone, not Door County's 5b
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your parcel in Door County
Pull a site-specific report for your exact address in Door County — soil, sun, drainage, frost risk, contamination, and scored plant recommendations.
Three things about your lot that Door County averages can't show:
We read public map data around Door County — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not Door County average
How we know this about Door County
The boundary: a cluster of neighboring counties. Growing regions have no official boundary, so this footprint is our published one, and every figure on this page was measured over the counties inside it rather than borrowed from the state around it.
The datasets: hardiness from the USDA ARS Plant Hardiness Zone Map 2023, aggregated across the footprint; the growing season from NOAA Regional Climate Centers ACIS 1991–2020 28°F normals, read at each member’s own record; boundaries from US Census TIGER/Line 2025; the contamination record from the federal sources named in that beat above; the soil from the USDA NRCS SSURGO survey, read at each member county’s own record and weighted to this footprint by land area. Where a member carries no record of its own, it is absent from the figure rather than filled in.
Common questions about Door County
What hardiness zone is Door County?
Door County spans USDA hardiness zones 5b, aggregated from the USDA Agricultural Research Service Plant Hardiness Zone Map 2023 across the region's counties. Zones reflect average annual extreme minimum temperatures from 1991–2020 data.
What grows well in Door County?
Door County's conditions suit plants such as Potato, Cranberry, Cherry, Sugar Maple, Ginseng. What actually thrives on any one site still turns on its specific soil, sun, and drainage — we score each plant against the real conditions at your address.
How is Door County defined?
Door County is defined here as a curated cluster of 1 neighboring counties that share a growing character. Growing regions have no official boundary, so this footprint is our published one — every county in it is named on this page.
Which states does Door County cover?
Door County spans Wisconsin. Each state's full growing guide is linked on this page.
What other growing regions cover the same states?
Driftless Area, Northwoods (Northern Wisconsin), Southeastern Wisconsin Lakeshore (Milwaukee Metro), Central Sands (Central Wisconsin), and Bayfield Peninsula Fruit Belt share at least one state with Door County. Growing regions overlap and interlock — a single address can sit inside more than one, which is why the precise read is always the parcel, not the region.
What this page reads at Door County’s own scale
5 of the readings below were taken at Door County's own scale — the zone 5b band across its footprint and 477 documented federal contamination records across its one county, 477 of them in Door County alone; one is borrowed from a wider read, named and linked below.
Measured here
- The USDA hardiness band 5b aggregated across the footprint's one countyUSDA PHZM 2023
- The boundary itself — the 1 county this region is curated fromGrowable Ground subregion registry
- The growing character that makes this region distinct from the states it crossesGrowable Ground subregion registry
- The federal contamination record over the whole footprint — 477 documented federal contamination records across its one county, 477 of them in Door County aloneEPA, USGS and USDA federal site records
- The soil order mix across the footprint — 38% Alfisols, topsoil pH 6.5–7.2, area-weighted across its one mapped countyUSDA NRCS SSURGO
Inherited from a wider read
- The candidate plant list — its state's curated sets, merged and filtered to zones 5bfrom Wisconsin
What this page can’t tell you
- Frost dates — they swing too far across a footprint this size to quote as one regional numberfrost dates explained →
- Which of those soils your own ground sits on — the survey maps them county-wide, and they change across a drivewaysoil types explained →
- The soil pH, drainage, sun hours, and frost pockets on one specific lotwhy one lot differs from the next →
Explore Door County
State growing guides
Counties in this region
Other growing regions across Wisconsin
An unglaciated landscape of steep ridges, deep valleys, and spring-fed coulees in the Upper Midwest — a stronghold of diversified small farms and cold-hardy fruit.
Wisconsin's coldest, shortest-season tier: the interior forest counties sit at hardiness zones 4a-4b with only 140-158 frost-free days (Florence 140, Sawyer 142, Vilas 143) — roughly two months shorter than the Milwaukee lakeshore. On glaciated northern soils where winter lows reach the -30F floor of zone 4a, Northwoods growers can't inherit the state page's averaged planting dates, variety lists, or perennial ratings — the short interior season sets a different rulebook than the driftless coulees or the lake-warmed Door peninsula to the south.
Wisconsin's warmest, longest-season corner — and its only zone 6a. Lake Michigan's thermal mass holds the immediate Milwaukee–Racine shore at USDA zone 6a with 216–217 frost-free days (USDA PHZM 2023 + county climate normals), roughly two extra months over the state's northern zone-4 country. The lake buffers spring and fall alike, so a metro or suburban grower here can run warm-season varieties and a planting calendar the statewide "short-season Wisconsin" page never delivers — grading honestly from 6a on the shore to 5b (188–210 frost-free days) across the inland metro and up the Sheboygan–Manitowoc coast. Distinct from Door County's cherry peninsula further north on the same shore.
Central Wisconsin's growing challenge isn't the cold — it's the sand. This is glacial-outwash country: the droughty, fast-draining, low-fertility sand plain left by Glacial Lake Wisconsin, which is why it became the state's irrigated vegetable belt (potatoes, snap beans, sweet corn) and the heart of the nation's #1 cranberry region around Wood and Juneau. At USDA zone 4b–5a your calendar reads mid-range, but the ground behaves nothing like Wisconsin's silt- and clay-loam average — water and nutrients move straight through, so irrigation and organic-matter building matter more here than the frost date. Towns on the sands: Wisconsin Rapids, Stevens Point, Plover, Bancroft.
Wisconsin's improbable orchard coast — the Bayfield peninsula's lakeshore reads 4b-5a with measured seasons to 179 days, Superior's deep water holding fall frost off long enough for the apples, pears, and berries the 4a interior cannot carry.