St. Mary of the Woods, Indiana, sits in USDA hardiness zones 6a-7b — room for a real mix of vegetables, fruit, and perennials matched to the local frost calendar.
Expect tomato, sweet corn, pawpaw, and peony to be strong candidates here; the deciding factors on any one parcel stay local — soil, sun, and drainage.
Even in St. Mary of the Woods, 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 St. Mary of the Woods lot. Enter your address and we'll score 1,112 plants against your land's actual soil, sun, and frost.
We read public map data for this spot — soil, climate, flood, and parcel records. How we handle your address.
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Quick Facts
USDA Zones
6a-7b
Last Hard Freeze (28°F)
Mar 14
Town normal — light frosts run a few weeks later
First Hard Freeze (28°F)
Nov 23
Town normal — light frosts arrive a few weeks earlier
Town Area
793 acres
Hardiness Zone Range
Zone maps are averages across St. Mary of the Woods. Your yard's slope, trees, and frost pockets shift what actually grows — see your land's exact reading.
Soil varies lot by lot — soil types explained.
What Grows in St. Mary of the Woods
Plants matched to St. Mary of the Woods's USDA zones 6a-7b — each links to its full growing profile.
Is it too late to plant in St. Mary of the Woods?
For most of the year, no — what changes is which crops still fit the days remaining. Cool-season crops can go in from around Feb 14; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Mar 14 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Nov 23 — long-season crops need about 90 days of runway, quick greens only 30. With a season this long, “too late” mostly means “switch crops” — second sowings and a full fall garden are the norm, with garlic closing the year.
Growing Challenges in Indiana
What an experienced grower plans around here — each one has a move.
Heavy clay soils limit drainage in many areas
Mounded rows and compost open clay up — and where water still stands, a raised bed ends the argument.
Late spring frosts through early May
Hold tender transplants until your local last-frost normal clears — hardy greens will happily take the early slot.
Hot humid summers promote blight and mildew
Mulch to stop soil splash, water at the base, and rotate crop families — the blight playbook your extension teaches.
For cultivar selection, pest pressure, and planting-time guidance specific to Indiana, the Purdue Extension is the authoritative local source.
Environmental Intelligence
Understanding what's nearby helps you make informed decisions about where and how to grow.
Total Sites
739
within ~10 miles of St. Mary of the Woods
Risk Level
High
Highest-severity
16 Superfund sites
Sources Checked
within ~10 miles of St. Mary of the Woods
Severity Distribution
within ~10 miles of St. Mary of the Woods
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around St. Mary of the Woods, Superfund runs higher than the national average — 16 sites nearby. That's not a problem with your land — it's information about it.
Superfund: Superfund sites represent the most severe contamination in the federal system.
Commission professional soil testing before any food production (test for heavy metals, VOCs, and SVOCs).
Check your specific parcel in St. Mary of the Woods
Get exact proximity distances to contamination sources for your specific parcel — plus soil, sun, drainage, and 1,112 plant recommendations.
Three things about your exact spot that zone averages miss:
We read public map data for this spot — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources analyzed in seconds
Your Specific Parcel Matters
St. Mary of the Woods Average
- ●USDA Zones 6a-7b
- ●Generic soil type for the area
- ●State-average frost dates
YOUR Parcel
- ✓Your exact hardiness zone
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in St. Mary of the Woods
Pull a site-specific report for your exact address in St. Mary of the Woods, Indiana — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your exact spot that zone averages miss:
We read public map data for this spot — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources analyzed in seconds
Key Growing Facts for St. Mary of the Woods, Indiana
- USDA Hardiness Zones: 6a-7b (USDA PHZM 2023)
- Last Hard Freeze (28°F): Mar 14 (town normal, NOAA 1991–2020 Climate Normals — light frosts can follow for a few weeks)
- First Hard Freeze (28°F): Nov 23 (town normal, NOAA 1991–2020 Climate Normals — light frosts can arrive a few weeks earlier)
- Days Between Hard Freezes: ~254 (town normal, NOAA 1991–2020 Climate Normals)
- Land Area: 793 acres (US Census TIGER 2025)
Zone data: USDA ARS Plant Hardiness Zone Map 2023. Climate data: NOAA NCEI. Boundaries: US Census TIGER/Line 2025.
Frequently Asked Questions
What hardiness zone is St. Mary of the Woods, Indiana?
St. Mary of the Woods sits in USDA hardiness zones 6a-7b, per the USDA Plant Hardiness Zone Map 2023. Zones reflect average annual extreme minimum temperatures from 1991–2020 weather data.
Is it too late to plant in St. Mary of the Woods?
For most of the year, no — what changes is which crops still fit the days remaining. Cool-season crops can go in from around Feb 14; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Mar 14 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Nov 23 — long-season crops need about 90 days of runway, quick greens only 30. With a season this long, “too late” mostly means “switch crops” — second sowings and a full fall garden are the norm, with garlic closing the year.
When does frost risk typically end in St. Mary of the Woods?
The last hard freeze (28°F) in St. Mary of the Woods typically lands around Mar 14, per NOAA 1991–2020 climate normals — an earlier marker than the light-frost dates many planting charts quote. That marks the hard freeze, not the last light frost — light frosts can still bite for a few more weeks, so tender transplants usually wait another 2–3 weeks.
When is the first frost in St. Mary of the Woods?
The first hard freeze (28°F) in St. Mary of the Woods typically arrives around Nov 23, per NOAA 1991–2020 climate normals — the point most tender summer crops finish. Lighter frosts usually reach a couple of weeks earlier, so watch the forecast from late summer on and harvest or cover tender plants before the first cold night.
What vegetables grow in St. Mary of the Woods?
St. Mary of the Woods's zones 6a-7b support a wide range — strong performers include Tomato, Sweet Corn, Pawpaw, Peony, and Apple. What actually takes on any one site comes down to its soil, sun, and drainage, and we score each plant against the real conditions at your address.
Which hardiness zone is St. Mary of the Woods, really?
Officially, St. Mary of the Woods sits in USDA zones 6a-7b (USDA PHZM 2023) — but a zone is a 30-year average of winter's coldest night across an area, and it can't see any one yard. A south-facing slope, a tree line, or a low frost pocket can shift a single site by half a zone either way, which is why neighboring gardeners often quote different numbers. We read the conditions at your exact address — soil, sun, slope, and frost — and score 1,112 plants against what's actually there.
Is the soil safe to grow vegetables in St. Mary of the Woods?
The federal record around St. Mary of the Woods runs heavier than most — 739 documented sites — so test the soil before planting food in the ground, and raised beds with clean imported soil grow well in the meantime. Even here, proximity to a documented site is information, not a diagnosis of any one yard; the contamination map shows exactly what's recorded and where.
How do I protect my plants from frost in St. Mary of the Woods?
As the season closes around the first 28°F hard freeze near Nov 23 (NOAA 1991–2020 climate normals), a few moves buy time: cover tender plants with floating row cover or an old sheet on still, clear nights, water the soil the afternoon before a freeze so it holds warmth overnight, and harvest frost-tender crops like tomatoes, peppers, and basil before the first hard night. Hardy greens and root crops shrug off light frost and often sweeten after it, so leave them in.
Everything on this page is a St. Mary of the Woods average. Your yard writes its own version — we read soil, sun, drainage, and frost at your exact address. Try it for 14 days — no card required.