Mount Royal, Pennsylvania, sits in USDA hardiness zone 7a — enough range to grow cool-season vegetables, hardy fruit, and warm-season crops that mature before the first hard frost.
Expect cabbage, hazelnut, 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 Mount Royal, 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 Mount Royal 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 Mount Royal — soil, climate, flood, and parcel records. How we handle your address.
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Mount Royal — the short answer
Mount Royal, Pennsylvania: USDA zone 7a, about 213 days between hard freezes, across 568 acres of town.
- USDA zone
- 7a
- USDA PHZM 2023
- Last hard freeze (28°F)
- Apr 4
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Nov 3
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~213
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Town area
- 568 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 Mount Royal's average, not your lot's — a low corner or a tree line moves it. Against Mount Royal's 213-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Mount Royal
Each reading below is measured for Mount Royal itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredMount Royal runs about 213 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
MeasuredMount Royal 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 Mount Royal is in
Mount Royal sits in the Northern Piedmont — EPA Level III, inside the wider Eastern Temperate Forests. That is read at Mount Royal's own centroid rather than borrowed from York County.
What Grows in Mount Royal
Every plant below cleared Mount Royal's own zone 7a and its 213-day season. Each card opens that plant's Pennsylvania profile. How we score.
Is it too late to plant in Mount Royal?
Too late for some crops, right on time for others — a growing season is a sequence, not a deadline. Cool-season crops can go in from around Mar 7; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Apr 4 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Nov 3 — 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 Mount Royal
Spotted lanternfly documented 4 miles from Mount Royal, first recorded 2018. What to watch for.
What's on the federal record near Mount Royal
Closest first, within ~10 miles of Mount Royal. Listing isn't leaking, and distance isn't exposure.
- HAKES GROCERYUnderground Storage Tanks · 350 ft
- YO 179Nitrate · 1.1 mi
- YO 742Nitrate · 1.5 mi
- YO 1015Nitrate · 1.5 mi
- YO 554Nitrate · 1.7 mi
- SPANGLERS FAMILY MKTUnderground Storage Tanks · 1.9 mi
- JERRY L RUTTERUnderground Storage Tanks · 2.0 mi
- YO 1023Nitrate · 2.2 mi
- NORA & REDDINGUnderground Storage Tanks · 2.3 mi
- YO 553Nitrate · 2.4 mi
- JK QUICK SHOPUnderground Storage Tanks · 2.4 mi
- YO 552Nitrate · 2.4 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Mount Royal'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 Mount Royal.
Total Sites
902
within ~10 miles of Mount Royal
Risk Level
Elevated
Highest-severity
2 Superfund sites (none NPL-listed)
Sources Checked
within ~10 miles of Mount Royal
Severity Distribution
within ~10 miles of Mount Royal
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Mount Royal, Toxics Release Inventory runs higher than the national average — 84 sites within ~10 miles of Mount Royal. 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 Mount Royal
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 Mount Royal average
Your land is one point inside Mount Royal
Everything above resolves to Mount Royal as a whole — one PHZM band and one 28°F frost record, read across 568 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 Mount Royal Average
Mount Royal Average
- ●USDA Zones 7a, averaged across Mount Royal
- ●One soil character for all of Mount Royal
- ●Frost dates read at Mount Royal's scale: Apr 4 to Nov 3
YOUR Parcel
- ✓Your exact zone, not Mount Royal's 7a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Mount Royal
Pull a site-specific report for your exact address in Mount Royal, Pennsylvania — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Mount Royal averages can't show:
We read public map data around Mount Royal — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Mount Royal average
How we know this about Mount Royal
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 Mount Royal’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 Mount Royal
When does frost risk typically end in Mount Royal?
The last hard freeze (28°F) in Mount Royal typically lands around Apr 4, 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 25.
When is the first frost in Mount Royal?
The first hard freeze (28°F) in Mount Royal typically arrives around Nov 3, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Oct 20, so the watching starts about Oct 4 — about 213 days after the spring freeze cleared.
How long is the growing season in Mount Royal?
Measured between 28°F hard freezes, Mount Royal sees about 213 frost-free days — roughly Apr 4 through Nov 3, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Apr 25 to Oct 20, about 178 days.
Is the soil safe to grow vegetables in Mount Royal?
The federal record around Mount Royal is a meaningful one — 902 documented sites, mostly Underground Storage Tanks entries (459), the nearest Underground Storage Tanks record under a tenth of a mile out — so a soil test before new food beds is a sensible precaution here, not a reason to hold back from growing. Remember that proximity to a documented site is information, not a diagnosis of any one yard; the contamination map shows exactly what sits where.
How do I protect my plants from frost in Mount Royal?
From about Oct 4 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 3 (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 3. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Mount Royal's scale — its 7a band and its 213-day season. Your yard writes its own version of Mount Royal'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 Mount Royal’s own scale
7 of the readings below were taken at Mount Royal's own scale — its own ~213-day season between 28°F freezes, the 568 acres it covers and 902 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Mount Royal's own USDA hardiness band, zones 7aUSDA PHZM 2023
- Mount Royal's own 28°F hard-freeze dates, about Apr 4 and Nov 3 and the ~213-day span between themNOAA 1991–2020 Climate Normals
- 902 documented contamination sites on the federal record near Mount Royal, the closest Underground Storage Tanks record under a tenth of a mile out from the town centreFederal environmental registers
- Mount Royal's boundary and the 568 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 7a and a ~213-day seasonGrowable Ground crop-matching engine
- The ecoregion at Mount Royal's own centroid, the Northern PiedmontUS EPA Level III Ecoregions
- A documented spotted-lanternfly record within reach of Mount Royallydemapr (De Bona & Helmus), 10 km survey lattice
Inherited from a wider read
- Soil character — no town-scale survey exists, so Mount Royal's 568 acres read through its county's SSURGO summaryfrom York County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom York 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 York County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Mount Royal's 568 acreswhy one lot differs from the next →
- Which side of Mount Royal you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 568 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 Mount Royal-wide figureread your own land →
More in Pennsylvania
Wider growing context
What grows across PennsylvaniaMount Royal sits outside our named growing regions, so Pennsylvania as a whole is its closest context here.
Nearby growing guides