Silverdale, Pennsylvania, sits in USDA hardiness zone 7a — a band that supports both cool-season staples and warm-season crops chosen to fit the local frost window.
The conditions favor cabbage, pawpaw, california poppy, and collard greens, among others — though every individual site edits that list with its own soil, sun, and drainage.
Even in Silverdale, 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 Silverdale 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 Silverdale — soil, climate, flood, and parcel records. How we handle your address.
No card required · your full report in seconds
Silverdale — the short answer
Silverdale, Pennsylvania: USDA zone 7a, about 209 days between hard freezes, across 264 acres of town.
- USDA zone
- 7a
- USDA PHZM 2023
- Last hard freeze (28°F)
- Apr 6
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Nov 1
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~209
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Town area
- 264 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 7a is Silverdale's average, not your lot's — a low corner or a tree line moves it. Against Silverdale's 209-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Silverdale
Each reading below is measured for Silverdale itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredSilverdale runs about 209 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
MeasuredSilverdale sits in USDA hardiness zone 7a.
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 Silverdale is in
Silverdale sits in the Northern Piedmont — EPA Level III, inside the wider Eastern Temperate Forests. That is read at Silverdale's own centroid rather than borrowed from Bucks County.
What Grows in Silverdale
Every plant below cleared Silverdale's own zone 7a and its 209-day season. Each card opens that plant's Pennsylvania profile. How we score.
Is it too late to plant in Silverdale?
Almost never — the real question is what to plant next. Cool-season crops can go in from around Mar 9; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Apr 6 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Nov 1 — long-season crops need about 90 days of runway, quick greens only 30. There is slack in a calendar like this — late plantings, second rounds of favorites, and a fall bench that keeps beds working.
Documented around Silverdale
Spotted lanternfly documented 2 miles from Silverdale, first recorded 2016. What to watch for.
What's on the federal record near Silverdale
Closest first, within ~10 miles of Silverdale. Listing isn't leaking, and distance isn't exposure.
- L RICE ELECUnderground Storage Tanks · 400 ft
- REESES GARAGE INCUnderground Storage Tanks · 800 ft
- REESES GARAGEBrownfields · 800 ft
- WORLD CLASS AUTO BODY/SILVERDALEBrownfields · 900 ft
- HERBS AUTO BODYUnderground Storage Tanks · 900 ft
- IG SALESUnderground Storage Tanks · 1400 ft
- CD MOYER COUnderground Storage Tanks · 2000 ft
- EDNA WINTON ESTATEUnderground Storage Tanks · 0.5 mi
- HILLTOWN TWP BUCKS CNTYUnderground Storage Tanks · 0.6 mi
- JERALD STOLTZUnderground Storage Tanks · 1.3 mi
- BK 2958Nitrate · 1.3 mi
- ELECTRO-MECH ASSEMBLY INCBrownfields · 1.5 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Silverdale'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 Silverdale.
Sources Checked
within ~10 miles of Silverdale
Severity Distribution
within ~10 miles of Silverdale
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Silverdale, Toxics Release Inventory runs higher than the national average — 102 sites within ~10 miles of Silverdale. It's not cause for alarm — it's worth knowing, and there's a sensible way to grow around it.
Toxics Release Inventory: TRI facilities report annual chemical releases to air, water, and land.
Check prevailing wind direction — downwind parcels face higher exposure than upwind or crosswind locations.
Check your specific parcel in Silverdale
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 Silverdale average
Your land is one point inside Silverdale
Everything above resolves to Silverdale as a whole — one PHZM band and one 28°F frost record, read across 264 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 Silverdale Average
Silverdale Average
- ●USDA Zones 7a, averaged across Silverdale
- ●One soil character for all of Silverdale
- ●Frost dates read at Silverdale's scale: Apr 6 to Nov 1
YOUR Parcel
- ✓Your exact zone, not Silverdale's 7a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Silverdale
Pull a site-specific report for your exact address in Silverdale, Pennsylvania — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Silverdale averages can't show:
We read public map data around Silverdale — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Silverdale average
How we know this about Silverdale
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 Silverdale’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 Silverdale
When does frost risk typically end in Silverdale?
The last hard freeze (28°F) in Silverdale typically lands around Apr 6, 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 27.
When is the first frost in Silverdale?
The first hard freeze (28°F) in Silverdale typically arrives around Nov 1, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Oct 18, so the watching starts about Oct 2 — about 209 days after the spring freeze cleared.
How long is the growing season in Silverdale?
Measured between 28°F hard freezes, Silverdale sees about 209 frost-free days — roughly Apr 6 through Nov 1, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Apr 27 to Oct 18, about 174 days.
Is the soil safe to grow vegetables in Silverdale?
The federal record around Silverdale runs heavier than most — 1,535 documented sites, mostly Underground Storage Tanks entries (778), 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 Silverdale?
From about Oct 2 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 1 (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 1. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Silverdale's scale — its 7a band and its 209-day season. Your yard writes its own version of Silverdale'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 Silverdale’s own scale
7 of the readings below were taken at Silverdale's own scale — its own ~209-day season between 28°F freezes, the 264 acres it covers and 1,535 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Silverdale's own USDA hardiness band, zones 7aUSDA PHZM 2023
- Silverdale's own 28°F hard-freeze dates, about Apr 6 and Nov 1 and the ~209-day span between themNOAA 1991–2020 Climate Normals
- 1,535 documented contamination sites on the federal record near Silverdale, the closest Underground Storage Tanks record under a tenth of a mile out from the town centreFederal environmental registers
- Silverdale's boundary and the 264 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 7a and a ~209-day seasonGrowable Ground crop-matching engine
- The ecoregion at Silverdale's own centroid, the Northern PiedmontUS EPA Level III Ecoregions
- A documented spotted-lanternfly record within reach of Silverdalelydemapr (De Bona & Helmus), 10 km survey lattice
Inherited from a wider read
- Soil character — no town-scale survey exists, so Silverdale's 264 acres read through its county's SSURGO summaryfrom Bucks County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Bucks 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 Bucks County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Silverdale's 264 acreswhy one lot differs from the next →
- Which side of Silverdale you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 264 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 Silverdale-wide figureread your own land →
More in Pennsylvania
Wider growing context
What grows across PennsylvaniaSilverdale sits outside our named growing regions, so Pennsylvania as a whole is its closest context here.
Nearby growing guides