Hybla Valley, Virginia, sits in USDA hardiness zone 7b — a band that supports both cool-season staples and warm-season crops chosen to fit the local frost window.
On paper, cabbage, prickly pear, california poppy, and collard greens all suit these conditions — on the ground, soil, sun, and drainage make the final call.
Even in Hybla Valley, 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 Hybla Valley 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 Hybla Valley — soil, climate, flood, and parcel records. How we handle your address.
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Hybla Valley — the short answer
Hybla Valley, Virginia: USDA zone 7b, about 254 days between hard freezes, across 1K acres of town.
- USDA zone
- 7b
- USDA PHZM 2023
- Last hard freeze (28°F)
- Mar 15
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Nov 24
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~254
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Town area
- 1K 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 Hybla Valley's average, not your lot's — a low corner or a tree line moves it. Against Hybla Valley's 254-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Hybla Valley
Each reading below is measured for Hybla Valley itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredHybla Valley runs about 254 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
MeasuredHybla Valley 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 Hybla Valley is in
Hybla Valley sits in the Southeastern Plains — EPA Level III, inside the wider Eastern Temperate Forests. That is read at Hybla Valley's own centroid, and it is not what its county reads: Fairfax County is mostly Piedmont. The wider page above you is answering a different question about different ground.
What Grows in Hybla Valley
Every plant below cleared Hybla Valley's own zone 7b and its 254-day season. Each card opens that plant's Virginia profile. How we score.
Is it too late to plant in Hybla Valley?
Almost never — the real question is what to plant next. Cool-season crops can go in from around Feb 15; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Mar 15 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Nov 24 — long-season crops need about 90 days of runway, quick greens only 30. A long window like this one runs successions deep into fall — and even its last weeks take quick greens and garlic.
Documented around Hybla Valley
Spotted lanternfly documented 1 miles from Hybla Valley, first recorded 2023. What to watch for.
What's on the federal record near Hybla Valley
Closest first, within ~10 miles of Hybla Valley. Listing isn't leaking, and distance isn't exposure.
- CYCLE SPORTBrownfields · 1200 ft
- PEP BOYS THE 232Brownfields · 1200 ft
- NTB # 613Brownfields · 1300 ft
- Sherwood Hall Service Center IncorporatedUnderground Storage Tanks · 1400 ft
- ADVANCE AUTO PARTS #9038Brownfields · 1400 ft
- HOME DEPOT STORE #4638Brownfields · 1500 ft
- SHOPPERS FOOD WAREHOUSE 2358Brownfields · 1800 ft
- WALGREENS #10233Brownfields · 1800 ft
- MOUNT VERNON GOVERNMENTUnderground Storage Tanks · 1800 ft
- PARKS FABRICARE EW CLNRSBrownfields · 1900 ft
- WALMART STORE 2258Brownfields · 1900 ft
- FIRESTONE STORE #0289/016357Underground Storage Tanks · 2000 ft
6 more sites are on the record inside the same radius. See them on the map
Measured from Hybla Valley'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 Hybla Valley.
Total Sites
2,526
within ~10 miles of Hybla Valley
Risk Level
Elevated
Highest-severity
28 Superfund sites (none NPL-listed)
Sources Checked
within ~10 miles of Hybla Valley
Severity Distribution
within ~10 miles of Hybla Valley
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.
- •TRI facilities report what they release. Check the wind — downwind beds catch more of it.
Check your specific parcel in Hybla Valley
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 Hybla Valley average
Your land is one point inside Hybla Valley
Everything above resolves to Hybla Valley as a whole — one PHZM band and one 28°F frost record, read across 1K 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 Hybla Valley Average
Hybla Valley Average
- ●USDA Zones 7b, averaged across Hybla Valley
- ●One soil character for all of Hybla Valley
- ●Frost dates read at Hybla Valley's scale: Mar 15 to Nov 24
YOUR Parcel
- ✓Your exact zone, not Hybla Valley's 7b
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Hybla Valley
Pull a site-specific report for your exact address in Hybla Valley, Virginia — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Hybla Valley averages can't show:
We read public map data around Hybla Valley — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Hybla Valley average
How we know this about Hybla Valley
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 Hybla Valley’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 Hybla Valley
When does frost risk typically end in Hybla Valley?
The last hard freeze (28°F) in Hybla Valley typically lands around Mar 15, 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 5.
When is the first frost in Hybla Valley?
The first hard freeze (28°F) in Hybla Valley typically arrives around Nov 24, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Nov 10, so the watching starts about Oct 25 — about 254 days after the spring freeze cleared.
How long is the growing season in Hybla Valley?
Measured between 28°F hard freezes, Hybla Valley sees about 254 frost-free days — roughly Mar 15 through Nov 24, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Apr 5 to Nov 10, about 219 days.
Is the soil safe to grow vegetables in Hybla Valley?
The federal record around Hybla Valley is a meaningful one — 2,526 documented sites, mostly Underground Storage Tanks entries (1,385), the nearest Brownfields record about 0.2 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 Hybla Valley?
From about Oct 25 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 24 (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 24. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Hybla Valley's scale — its 7b band and its 254-day season. Your yard writes its own version of Hybla Valley'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 Hybla Valley’s own scale
7 of the readings below were taken at Hybla Valley's own scale — its own ~254-day season between 28°F freezes, the 1,314 acres it covers and 2,526 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Hybla Valley's own USDA hardiness band, zones 7bUSDA PHZM 2023
- Hybla Valley's own 28°F hard-freeze dates, about Mar 15 and Nov 24 and the ~254-day span between themNOAA 1991–2020 Climate Normals
- 2,526 documented contamination sites on the federal record near Hybla Valley, the closest Brownfields record about 0.2 miles out from the town centreFederal environmental registers
- Hybla Valley's boundary and the 1,314 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 7b and a ~254-day seasonGrowable Ground crop-matching engine
- Hybla Valley sits in the Southeastern Plains — not the ecoregion its county mostly readsUS EPA Level III Ecoregions
- A documented spotted-lanternfly record within reach of Hybla Valleylydemapr (De Bona & Helmus), 10 km survey lattice
Inherited from a wider read
- Soil character — no town-scale survey exists, so Hybla Valley's 1,314 acres read through its county's SSURGO summaryfrom Fairfax County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Fairfax County
- The growing challenges every Virginia grower plans around — written at state scale, so they stay on the state guidefrom Virginia
- Butterfly and beetle records, and the farmland pesticide estimate — all published county-widefrom Fairfax County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Hybla Valley's 1,314 acreswhy one lot differs from the next →
- Which side of Hybla Valley you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 1,314 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Brownfields record about 0.2 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 Hybla Valley-wide figureread your own land →