Conshohocken, Pennsylvania, sits in USDA hardiness zone 7b — room for a real mix of vegetables, fruit, and perennials matched to the local frost calendar.
Expect cabbage, prickly pear, california poppy, and collard greens to be strong candidates here; the deciding factors on any one parcel stay local — soil, sun, and drainage.
Even in Conshohocken, 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 Conshohocken 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 Conshohocken — soil, climate, flood, and parcel records. How we handle your address.
No card required · your full report in seconds
Conshohocken — the short answer
Conshohocken, Pennsylvania: USDA zone 7b, about 237 days between hard freezes, across 643 acres of town.
- USDA zone
- 7b
- USDA PHZM 2023
- Last hard freeze (28°F)
- Mar 24
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Nov 16
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~237
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Town area
- 643 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 7b is Conshohocken's average, not your lot's — a low corner or a tree line moves it. Against Conshohocken's 237-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Conshohocken
Each reading below is measured for Conshohocken itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredConshohocken runs about 237 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
MeasuredConshohocken sits in USDA hardiness zone 7b.
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 Conshohocken is in
Conshohocken sits in the Northern Piedmont — EPA Level III, inside the wider Eastern Temperate Forests. That is read at Conshohocken's own centroid rather than borrowed from Montgomery County.
What Grows in Conshohocken
Every plant below cleared Conshohocken's own zone 7b and its 237-day season. Each card opens that plant's Pennsylvania profile. How we score.
Is it too late to plant in Conshohocken?
Almost never — the real question is what to plant next. Cool-season crops can go in from around Feb 24; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Mar 24 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Nov 16 — 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.
Documented around Conshohocken
Spotted lanternfly documented 1 miles from Conshohocken, first recorded 2017. What to watch for.
What's on the federal record near Conshohocken
Closest first, within ~10 miles of Conshohocken. Listing isn't leaking, and distance isn't exposure.
- CONSHOHOCKEN ACCOUNTING OFCUnderground Storage Tanks · 250 ft
- CONSHOHOCKEN POST OFCUnderground Storage Tanks · 250 ft
- BOB WILSON SVCUnderground Storage Tanks · 350 ft
- CVS PHARMACY #3252Brownfields · 850 ft
- EXXON RAS NO 21556Brownfields · 1000 ft
- FAYETTE STREET EXXONUnderground Storage Tanks · 1100 ft
- CONSHOHOCKEN FUELS 67244Underground Storage Tanks · 1300 ft
- SPARTECH VY-CAL PLASTICS CORPToxics Release Inventory · 1300 ft
- PLEASANT VALLEY OFCUnderground Storage Tanks · 1400 ft
- DM SABIA & COUnderground Storage Tanks · 1500 ft
- STRAINSERTBrownfields · 1500 ft
- FINE GRINDING CORP.Brownfields · 1800 ft
6 more sites are on the record inside the same radius. See them on the map
Measured from Conshohocken'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 Conshohocken.
Sources Checked
within ~10 miles of Conshohocken
Severity Distribution
within ~10 miles of Conshohocken
Highest-Severity Sites
Know Before You Grow
- •Underground tanks leak petroleum as they age — near a former filling station, test the soil.
- •Near a brownfield, raised beds of imported soil give your food clean ground.
- •On a private well, test for nitrates: above 10 mg/L the water needs treatment before irrigating.
Check your specific parcel in Conshohocken
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 Conshohocken average
Your land is one point inside Conshohocken
Everything above resolves to Conshohocken as a whole — one PHZM band and one 28°F frost record, read across 643 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 Conshohocken Average
Conshohocken Average
- ●USDA Zones 7b, averaged across Conshohocken
- ●One soil character for all of Conshohocken
- ●Frost dates read at Conshohocken's scale: Mar 24 to Nov 16
YOUR Parcel
- ✓Your exact zone, not Conshohocken's 7b
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Conshohocken
Pull a site-specific report for your exact address in Conshohocken, Pennsylvania — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Conshohocken averages can't show:
We read public map data around Conshohocken — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Conshohocken average
How we know this about Conshohocken
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 Conshohocken’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 Conshohocken
When does frost risk typically end in Conshohocken?
The last hard freeze (28°F) in Conshohocken typically lands around Mar 24, 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 14.
When is the first frost in Conshohocken?
The first hard freeze (28°F) in Conshohocken typically arrives around Nov 16, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Nov 2, so the watching starts about Oct 17 — about 237 days after the spring freeze cleared.
How long is the growing season in Conshohocken?
Measured between 28°F hard freezes, Conshohocken sees about 237 frost-free days — roughly Mar 24 through Nov 16, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Apr 14 to Nov 2, about 202 days.
Is the soil safe to grow vegetables in Conshohocken?
The federal record around Conshohocken runs heavier than most — 3,408 documented sites, mostly Underground Storage Tanks entries (1,890), the nearest Underground Storage Tanks record under a tenth of a mile out — 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 Conshohocken?
From about Oct 17 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 16 (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 16. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Conshohocken's scale — its 7b band and its 237-day season. Your yard writes its own version of Conshohocken'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 Conshohocken’s own scale
7 of the readings below were taken at Conshohocken's own scale — its own ~237-day season between 28°F freezes, the 643 acres it covers and 3,408 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Conshohocken's own USDA hardiness band, zones 7bUSDA PHZM 2023
- Conshohocken's own 28°F hard-freeze dates, about Mar 24 and Nov 16 and the ~237-day span between themNOAA 1991–2020 Climate Normals
- 3,408 documented contamination sites on the federal record near Conshohocken, the closest Underground Storage Tanks record under a tenth of a mile out from the town centreFederal environmental registers
- Conshohocken's boundary and the 643 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 7b and a ~237-day seasonGrowable Ground crop-matching engine
- The ecoregion at Conshohocken's own centroid, the Northern PiedmontUS EPA Level III Ecoregions
- A documented spotted-lanternfly record within reach of Conshohockenlydemapr (De Bona & Helmus), 10 km survey lattice
Inherited from a wider read
- Soil character — no town-scale survey exists, so Conshohocken's 643 acres read through its county's SSURGO summaryfrom Montgomery County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Montgomery County
- The growing challenges every Pennsylvania grower plans around — written at state scale, so they stay on the state guidefrom Pennsylvania
- Butterfly and beetle records, and the farmland pesticide estimate — all published county-widefrom Montgomery County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Conshohocken's 643 acreswhy one lot differs from the next →
- Which side of Conshohocken you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 643 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 Conshohocken-wide figureread your own land →
More in Pennsylvania
Wider growing context
What grows across PennsylvaniaConshohocken sits outside our named growing regions, so Pennsylvania as a whole is its closest context here.
Nearby growing guides