Glasgow, Delaware, sits in USDA hardiness zone 7b — room for a real mix of vegetables, fruit, and perennials matched to the local frost calendar.
A short list that earns its place here — cabbage, prickly pear, california poppy, and collard greens — with any one site's soil, sun, and drainage making the final cut.
Even in Glasgow, 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 Glasgow 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 Glasgow — soil, climate, flood, and parcel records. How we handle your address.
No card required · your full report in seconds
Glasgow — the short answer
Glasgow, Delaware: USDA zone 7b, about 231 days between hard freezes, across 6K acres of town.
- USDA zone
- 7b
- USDA PHZM 2023
- Last hard freeze (28°F)
- Mar 27
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Nov 13
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~231
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Town area
- 6K 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 Glasgow's average, not your lot's — a low corner or a tree line moves it. Against Glasgow's 231-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Glasgow
Each reading below is measured for Glasgow itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredGlasgow runs about 231 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
MeasuredGlasgow 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 Glasgow is in
Glasgow sits in the Middle Atlantic Coastal Plain — EPA Level III, inside the wider Eastern Temperate Forests. That is read at Glasgow's own centroid rather than borrowed from New Castle County.
What Grows in Glasgow
Every plant below cleared Glasgow's own zone 7b and its 231-day season. Each card opens that plant's Delaware profile. How we score.
Is it too late to plant in Glasgow?
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 Feb 27; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Mar 27 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Nov 13 — 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 Glasgow
Spotted lanternfly documented 3 miles from Glasgow, first recorded 2018. What to watch for.
What's on the federal record near Glasgow
Closest first, within ~10 miles of Glasgow. Listing isn't leaking, and distance isn't exposure.
- SAFEWAY STORE #4030Brownfields · 550 ft
- RITE AID #1751Brownfields · 650 ft
- HOME DEPOT STORE #1603Brownfields · 850 ft
- Cumberland Farms Inc NewarkUnderground Storage Tanks · 950 ft
- SMO #487Underground Storage Tanks · 1300 ft
- Former Arco StationUnderground Storage Tanks · 1300 ft
- JIFFY LUBE-GLASGOWBrownfields · 1400 ft
- Cumberland Gulf #122399 NewarkUnderground Storage Tanks · 1500 ft
- 896 DeliUnderground Storage Tanks · 1600 ft
- PAUL M. HODGSON VOCATIONAL TECHNICAL HIGH SCHOOLBrownfields · 1600 ft
- AMOCO #5185Brownfields · 1700 ft
- Glasgow BPUnderground Storage Tanks · 1800 ft
6 more sites are on the record inside the same radius. See them on the map
Measured from Glasgow'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 Glasgow.
Sources Checked
within ~10 miles of Glasgow
Severity Distribution
within ~10 miles of Glasgow
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Glasgow, Superfund runs higher than the national average — 31 sites within ~10 miles of Glasgow. It's not cause for alarm — it's worth knowing, and there's a sensible way to grow around 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 Glasgow
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 Glasgow average
Your land is one point inside Glasgow
Everything above resolves to Glasgow as a whole — one PHZM band and one 28°F frost record, read across 6K 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 Glasgow Average
Glasgow Average
- ●USDA Zones 7b, averaged across Glasgow
- ●One soil character for all of Glasgow
- ●Frost dates read at Glasgow's scale: Mar 27 to Nov 13
YOUR Parcel
- ✓Your exact zone, not Glasgow's 7b
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Glasgow
Pull a site-specific report for your exact address in Glasgow, Delaware — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Glasgow averages can't show:
We read public map data around Glasgow — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Glasgow average
How we know this about Glasgow
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 Glasgow’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 Glasgow
When does frost risk typically end in Glasgow?
The last hard freeze (28°F) in Glasgow typically lands around Mar 27, 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 17.
When is the first frost in Glasgow?
The first hard freeze (28°F) in Glasgow typically arrives around Nov 13, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Oct 30, so the watching starts about Oct 14 — about 231 days after the spring freeze cleared.
How long is the growing season in Glasgow?
Measured between 28°F hard freezes, Glasgow sees about 231 frost-free days — roughly Mar 27 through Nov 13, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Apr 17 to Oct 30, about 196 days.
Is the soil safe to grow vegetables in Glasgow?
The federal record around Glasgow runs heavier than most — 1,567 documented sites, mostly Underground Storage Tanks entries (700), the nearest Brownfields record about 0.1 miles 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 Glasgow?
From about Oct 14 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 13 (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 13. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Glasgow's scale — its 7b band and its 231-day season. Your yard writes its own version of Glasgow'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 Glasgow’s own scale
7 of the readings below were taken at Glasgow's own scale — its own ~231-day season between 28°F freezes, the 6,352 acres it covers and 1,567 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Glasgow's own USDA hardiness band, zones 7bUSDA PHZM 2023
- Glasgow's own 28°F hard-freeze dates, about Mar 27 and Nov 13 and the ~231-day span between themNOAA 1991–2020 Climate Normals
- 1,567 documented contamination sites on the federal record near Glasgow, the closest Brownfields record about 0.1 miles out from the town centreFederal environmental registers
- Glasgow's boundary and the 6,352 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 7b and a ~231-day seasonGrowable Ground crop-matching engine
- The ecoregion at Glasgow's own centroid, the Middle Atlantic Coastal PlainUS EPA Level III Ecoregions
- A documented spotted-lanternfly record within reach of Glasgowlydemapr (De Bona & Helmus), 10 km survey lattice
Inherited from a wider read
- Soil character — no town-scale survey exists, so Glasgow's 6,352 acres read through its county's SSURGO summaryfrom New Castle County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom New Castle County
- The growing challenges every Delaware grower plans around — written at state scale, so they stay on the state guidefrom Delaware
- Butterfly and beetle records, and the farmland pesticide estimate — all published county-widefrom New Castle County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Glasgow's 6,352 acreswhy one lot differs from the next →
- Which side of Glasgow you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 6,352 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Brownfields record about 0.1 miles 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 Glasgow-wide figureread your own land →