Southeastern Massachusetts spans USDA hardiness zone 7a — a zone band wide enough that plant choice, not possibility, is the interesting question.
The low coastal plain of the South Coast — mild, moist, and worked for market vegetables and small orchards for generations. On paper, tomato, zucchini, kale, and lilac all suit these conditions — on the ground, soil, sun, and drainage make the final call.
Southeastern Massachusetts spans Massachusetts.
Your yard isn't all of Southeastern Massachusetts.
Southeastern Massachusetts spans USDA zones 7a, 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 Southeastern Massachusetts — soil, climate, flood, and parcel records. How we handle your address.
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Southeastern Massachusetts — the short answer
Southeastern Massachusetts: USDA zones 7a, 233 frost-free days, in Massachusetts.
- USDA zones
- 7a
- USDA PHZM 2023, aggregated over the footprint
- Frost-free season
- 233 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 Southeastern Massachusetts
Plants matched to Southeastern Massachusetts's USDA zones 7a, 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 Southeastern Massachusetts
Plants the USDA PLANTS Database documents as native and present in this region’s state, kept only where the published hardiness range meets Southeastern Massachusetts’s USDA zones 7a — 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 Southeastern Massachusetts
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 Inceptisols, at 63% of mapped acres, followed by Entisols (25%) and Histosols (12%). Four 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 Paxton, Hinckley, and Woodbridge.
23% of those acres are very poorly drained, and another 22% well drained, 15% excessively drained. Topsoil pH runs 4.6–5.5 in that county’s own record. 10% of the footprint is classed prime farmland.
Soil order
Inceptisols
Drainage
Very poorly drained
Topsoil pH
4.6–5.5
Hydric soils
35%
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 Southeastern Massachusetts
The soil survey reads this ground county by county, and the readings above are those records summed across Southeastern Massachusetts. Here is what they mean for a garden here — and the move an experienced grower makes about each one.
Drainage
From county records23% of the mapped acres across Southeastern Massachusetts are very poorly drained — ground that sheds water slowly. That is area-weighted across its one mapped county.
Beds can stay saturated for days after heavy rain, and the roots of most vegetables, berries, and fruit trees suffocate or rot in soil that never drains.
Raised beds or mounded rows lift roots above the wet zone; choose water-tolerant crops for the lowest spots.
USDA NRCS SSURGO
Surface pH
From county recordsTopsoil across Southeastern Massachusetts runs pH 4.6–5.5 — acidic in the one record covering it.
Blueberries, potatoes, and rhododendrons thrive in it, but most vegetables start locking out nutrients below about pH 6.0 and grow pale and stunted no matter how much you feed them.
A measured lime application raises pH for the crops that need it — but test first, because the right rate depends on your own soil, not the county average.
USDA NRCS SSURGO
Safe to Grow Here?
What the federal record shows across Southeastern Massachusetts — and how to grow with it.
Across Southeastern Massachusetts's 1 county the federal record holds 3,086 documented sites, mostly Brownfields (1,821), Underground Storage Tanks (933) and Toxics Release Inventory (219). The heaviest single county is Bristol County, with 3,086.
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 Southeastern Massachusetts to see which records sit where you actually grow.
Sources Checked
Summed across the county in Southeastern Massachusetts
A note from Gnorman
What an experienced grower watches for around here
In and around Southeastern Massachusetts, two things run higher than the national average across the county in Southeastern Massachusetts — Superfund (50 sites) and Brownfields (1,821 sites). 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.
Brownfields: Brownfield sites are former commercial or industrial properties where legacy soil contamination (heavy metals, PAHs, petroleum compounds) may persist.
Commission professional soil testing before any food production (test for heavy metals, VOCs, and SVOCs).
Check EPA brownfield remediation status — many sites have completed cleanup with institutional controls.
Sources: EPA, USGS — 1.8M documented sites tracked nationwide across 9 federal source types.
Your land is one point inside Southeastern Massachusetts
Everything above resolves to Southeastern Massachusetts as a whole — a footprint spanning USDA zones 7a. 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 Southeastern Massachusetts Average
Southeastern Massachusetts Average
- ●USDA Zones 7a, averaged across Southeastern Massachusetts
- ●One soil character for all of Southeastern Massachusetts
- ●State-average frost dates
YOUR Parcel
- ✓Your exact zone, not Southeastern Massachusetts's 7a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your parcel in Southeastern Massachusetts
Pull a site-specific report for your exact address in Southeastern Massachusetts — soil, sun, drainage, frost risk, contamination, and scored plant recommendations.
Three things about your lot that Southeastern Massachusetts averages can't show:
We read public map data around Southeastern Massachusetts — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not Southeastern Massachusetts average
How we know this about Southeastern Massachusetts
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 Southeastern Massachusetts
What hardiness zone is Southeastern Massachusetts?
Southeastern Massachusetts spans USDA hardiness zones 7a, 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 Southeastern Massachusetts?
Southeastern Massachusetts's conditions suit plants such as Tomato, Zucchini, Kale, Lilac, Garlic, Blueberry. 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 Southeastern Massachusetts defined?
Southeastern Massachusetts 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 Southeastern Massachusetts cover?
Southeastern Massachusetts spans Massachusetts. Each state's full growing guide is linked on this page.
What other growing regions cover the same states?
Cape Cod & the Islands, Greater Boston, Pioneer Valley, The Berkshires, Central Massachusetts, and North Shore share at least one state with Southeastern Massachusetts. 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 Southeastern Massachusetts’s own scale
5 of the readings below were taken at Southeastern Massachusetts's own scale — the zone 7a band across its footprint and 3,086 documented federal contamination records across its one county, 3,086 of them in Bristol County alone; one is borrowed from a wider read, named and linked below.
Measured here
- The USDA hardiness band 7a 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 — 3,086 documented federal contamination records across its one county, 3,086 of them in Bristol County aloneEPA, USGS and USDA federal site records
- The soil order mix across the footprint — 63% Inceptisols, topsoil pH 4.6–5.5, 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 7afrom Massachusetts
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 Southeastern Massachusetts
State growing guides
Counties in this region
Other growing regions across Massachusetts
A sandy, maritime-tempered peninsula and islands with acidic soils long worked for cranberries, beach plums, and salt-tolerant kitchen gardens.
The state's dense urban core, where growing means raised beds, community plots, and back-lot kitchen gardens more than open field — a long mild season, with city soil the thing to know before you dig.
The Connecticut River's broad valley floor and the richest farm ground in the state — deep alluvial soils and a warmer pocket than the hills on either side, long worked as market-garden and tobacco country.
Western Massachusetts' cool, hilly uplands of rocky glacial soils and a short season suited to apples, maples, and cold-hardy market gardens.
The inland heart of the state — rolling upland, cooler nights, a shorter season than the coast, and stony glacial soils that reward the gardener who feeds and drains them.
The settled coast north of Boston — salt air, tidy town lots, and sea-tempered winters that hold the cold off a little longer than the hills inland.