South Bethany, Delaware, sits in USDA hardiness zone 8a — a range where zone-matched perennials and frost-aware annual timing set what succeeds.
Crops well matched to these conditions include cabbage, fig, california poppy, and collard greens — though what thrives on any one site still turns on its specific soil, sun, and drainage.
Even in South Bethany, 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 South Bethany 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 South Bethany — soil, climate, flood, and parcel records. How we handle your address.
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South Bethany — the short answer
South Bethany, Delaware: USDA zone 8a, about 264 days between hard freezes, across 322 acres of town.
- USDA zone
- 8a
- USDA PHZM 2023
- Last hard freeze (28°F)
- Mar 12
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Dec 1
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~264
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Town area
- 322 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 8a is South Bethany's average, not your lot's — a low corner or a tree line moves it. Against South Bethany's 264-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in South Bethany
Each reading below is measured for South Bethany itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredSouth Bethany runs about 264 days between hard freezes — close to year-round growing.
Frost is rarely the limit here; winter plantings are as real as summer ones, and the harder question is which crops shrug off the summer heat.
Grow cool-season crops through the mild winter, and choose heat-tolerant varieties for the summer beds.
NOAA 1991–2020 Climate Normals
Winter hardiness
MeasuredSouth Bethany sits in USDA hardiness zone 8a.
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 South Bethany is in
South Bethany sits in the Middle Atlantic Coastal Plain — EPA Level III, inside the wider Eastern Temperate Forests. That is read at South Bethany's own centroid rather than borrowed from Sussex County.
What Grows in South Bethany
Every plant below cleared South Bethany's own zone 8a and its 264-day season. Each card opens that plant's Delaware profile. How we score.
Is it too late to plant in South Bethany?
Almost never — the real question is what to plant next. Cool-season crops can go in from around Feb 12; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Mar 12 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Dec 1 — long-season crops need about 90 days of runway, quick greens only 30. With almost year-round growing weather, timing is about heat and rainfall more than frost — some bench is always in play.
Documented around South Bethany
Spotted lanternfly documented 3 miles from South Bethany, first recorded 2021. What to watch for.
What's on the federal record near South Bethany
Closest first, within ~10 miles of South Bethany. Listing isn't leaking, and distance isn't exposure.
- Town of South Bethany BeachUnderground Storage Tanks · 2500 ft
- Beastons MarinaUnderground Storage Tanks · 0.6 mi
- Qj41-02Nitrate · 0.7 mi
- Hamonds ExxonUnderground Storage Tanks · 0.7 mi
- CVS PHARMACY #4710Brownfields · 0.9 mi
- Pep Up #1 Bethany BeachUnderground Storage Tanks · 1.0 mi
- Cliff ParkerUnderground Storage Tanks · 1.3 mi
- Sea ColonyUnderground Storage Tanks · 1.3 mi
- Hurley PropertyUnderground Storage Tanks · 1.3 mi
- Bethany Beach Fire StationUnderground Storage Tanks · 1.4 mi
- Del DOT Route 26 right of wayUnderground Storage Tanks · 1.5 mi
- Qj32-08Nitrate · 1.6 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from South Bethany'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 South Bethany.
Total Sites
355
within ~10 miles of South Bethany
Risk Level
Elevated
Highest-severity
2 Superfund sites (none NPL-listed)
Sources Checked
within ~10 miles of South Bethany
Severity Distribution
within ~10 miles of South Bethany
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around South Bethany, two things run higher than the national average within ~10 miles of South Bethany — PFAS (6 sites) and CAFO (6 sites). Knowing it is half the work — and it's nothing a thoughtful grower can't plan for.
PFAS: PFAS (per- and polyfluoroalkyl substances) are called "forever chemicals" because they do not biodegrade.
CAFO: CAFOs pose a different contamination profile than chemical sources.
Test irrigation water source — this is the primary pathway for PFAS to reach garden crops.
Wash all produce consumed raw thoroughly, especially leafy greens grown near CAFOs.
Check your specific parcel in South Bethany
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 South Bethany average
Your land is one point inside South Bethany
Everything above resolves to South Bethany as a whole — one PHZM band and one 28°F frost record, read across 322 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 South Bethany Average
South Bethany Average
- ●USDA Zones 8a, averaged across South Bethany
- ●One soil character for all of South Bethany
- ●Frost dates read at South Bethany's scale: Mar 12 to Dec 1
YOUR Parcel
- ✓Your exact zone, not South Bethany's 8a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in South Bethany
Pull a site-specific report for your exact address in South Bethany, Delaware — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that South Bethany averages can't show:
We read public map data around South Bethany — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the South Bethany average
How we know this about South Bethany
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 South Bethany’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 South Bethany
When does frost risk typically end in South Bethany?
The last hard freeze (28°F) in South Bethany typically lands around Mar 12, 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 2.
When is the first frost in South Bethany?
The first hard freeze (28°F) in South Bethany typically arrives around Dec 1, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Nov 17, so the watching starts about Nov 1 — about 264 days after the spring freeze cleared.
How long is the growing season in South Bethany?
Measured between 28°F hard freezes, South Bethany sees about 264 frost-free days — roughly Mar 12 through Dec 1, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Apr 2 to Nov 17, about 229 days.
Is the soil safe to grow vegetables in South Bethany?
The federal record around South Bethany is a meaningful one — 355 documented sites, mostly Underground Storage Tanks entries (169), the nearest Underground Storage Tanks record about 0.5 miles 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 South Bethany?
From about Nov 1 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 Dec 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 Dec 1. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at South Bethany's scale — its 8a band and its 264-day season. Your yard writes its own version of South Bethany'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 South Bethany’s own scale
7 of the readings below were taken at South Bethany's own scale — its own ~264-day season between 28°F freezes, the 322 acres it covers and 355 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- South Bethany's own USDA hardiness band, zones 8aUSDA PHZM 2023
- South Bethany's own 28°F hard-freeze dates, about Mar 12 and Dec 1 and the ~264-day span between themNOAA 1991–2020 Climate Normals
- 355 documented contamination sites on the federal record near South Bethany, the closest Underground Storage Tanks record about 0.5 miles out from the town centreFederal environmental registers
- South Bethany's boundary and the 322 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 8a and a ~264-day seasonGrowable Ground crop-matching engine
- The ecoregion at South Bethany's own centroid, the Middle Atlantic Coastal PlainUS EPA Level III Ecoregions
- A documented spotted-lanternfly record within reach of South Bethanylydemapr (De Bona & Helmus), 10 km survey lattice
Inherited from a wider read
- Soil character — no town-scale survey exists, so South Bethany's 322 acres read through its county's SSURGO summaryfrom Sussex County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Sussex 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 Sussex County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among South Bethany's 322 acreswhy one lot differs from the next →
- Which side of South Bethany you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 322 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Underground Storage Tanks record about 0.5 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 South Bethany-wide figureread your own land →