Fair Oaks, Virginia, sits in USDA hardiness zone 7a — a zone band wide enough that plant choice, not possibility, is the interesting question.
A short list that earns its place here — cabbage, hazelnut, california poppy, and collard greens — with any one site's soil, sun, and drainage making the final cut.
Even in Fair Oaks, 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 Fair Oaks 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 Fair Oaks — soil, climate, flood, and parcel records. How we handle your address.
No card required · your full report in seconds
Fair Oaks — the short answer
Fair Oaks, Virginia: USDA zone 7a, about 225 days between hard freezes, across 3K acres of town.
- USDA zone
- 7a
- USDA PHZM 2023
- Last hard freeze (28°F)
- Mar 30
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Nov 10
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~225
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Town area
- 3K 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 Fair Oaks's average, not your lot's — a low corner or a tree line moves it. Against Fair Oaks's 225-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Fair Oaks
Each reading below is measured for Fair Oaks itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredFair Oaks runs about 225 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
MeasuredFair Oaks 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 Fair Oaks is in
Fair Oaks sits in the Piedmont — EPA Level III, inside the wider Eastern Temperate Forests. That is read at Fair Oaks's own centroid rather than borrowed from Fairfax County.
What Grows in Fair Oaks
Every plant below cleared Fair Oaks's own zone 7a and its 225-day season. Each card opens that plant's Virginia profile. How we score.
Is it too late to plant in Fair Oaks?
Rarely: the season closes in stages, not all at once, and each stage has its crops. Cool-season crops can go in from around Mar 2; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Mar 30 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Nov 10 — long-season crops need about 90 days of runway, quick greens only 30. Here the season winds down slowly: late sowings, a real autumn harvest, and garlic in the ground before the first hard freeze.
Documented around Fair Oaks
Spotted lanternfly documented 4 miles from Fair Oaks, first recorded 2020. What to watch for.
What's on the federal record near Fair Oaks
Closest first, within ~10 miles of Fair Oaks. Listing isn't leaking, and distance isn't exposure.
- SEPHORA STORE # 340 (FAIR OAKS)Brownfields · 300 ft
- HOLIDAY INN FAIR OAKSUnderground Storage Tanks · 750 ft
- HOLLISTER CO.Brownfields · 950 ft
- GREENWOODUnderground Storage Tanks · 950 ft
- FAIR OAKS PUMPING STATIONUnderground Storage Tanks · 1100 ft
- OAKWOOD CORPORATE CENTERUnderground Storage Tanks · 1200 ft
- ABERCROMBIE (KIDS)Brownfields · 1400 ft
- Macys Fair OaksUnderground Storage Tanks · 1400 ft
- ABERCROMBIE & FITCHBrownfields · 1400 ft
- MACY’S – FAIR OAKS MALL (M)Brownfields · 1500 ft
- J C PENNEYUnderground Storage Tanks · 1500 ft
- SEARS ROEBUCK & COMPANYUnderground Storage Tanks · 1500 ft
6 more sites are on the record inside the same radius. See them on the map
Measured from Fair Oaks'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 Fair Oaks.
Total Sites
2,178
within ~10 miles of Fair Oaks
Risk Level
Elevated
Highest-severity
2 Superfund sites (none NPL-listed)
Sources Checked
within ~10 miles of Fair Oaks
Severity Distribution
within ~10 miles of Fair Oaks
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 Fair Oaks
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 Fair Oaks average
Your land is one point inside Fair Oaks
Everything above resolves to Fair Oaks as a whole — one PHZM band and one 28°F frost record, read across 3K 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 Fair Oaks Average
Fair Oaks Average
- ●USDA Zones 7a, averaged across Fair Oaks
- ●One soil character for all of Fair Oaks
- ●Frost dates read at Fair Oaks's scale: Mar 30 to Nov 10
YOUR Parcel
- ✓Your exact zone, not Fair Oaks's 7a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Fair Oaks
Pull a site-specific report for your exact address in Fair Oaks, Virginia — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Fair Oaks averages can't show:
We read public map data around Fair Oaks — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Fair Oaks average
How we know this about Fair Oaks
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 Fair Oaks’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 Fair Oaks
When does frost risk typically end in Fair Oaks?
The last hard freeze (28°F) in Fair Oaks typically lands around Mar 30, 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 20.
When is the first frost in Fair Oaks?
The first hard freeze (28°F) in Fair Oaks typically arrives around Nov 10, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Oct 27, so the watching starts about Oct 11 — about 225 days after the spring freeze cleared.
How long is the growing season in Fair Oaks?
Measured between 28°F hard freezes, Fair Oaks sees about 225 frost-free days — roughly Mar 30 through Nov 10, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Apr 20 to Oct 27, about 190 days.
Is the soil safe to grow vegetables in Fair Oaks?
The federal record around Fair Oaks is a meaningful one — 2,178 documented sites, mostly Underground Storage Tanks entries (1,129), the nearest Brownfields 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 Fair Oaks?
From about Oct 11 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 10 (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 10. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Fair Oaks's scale — its 7a band and its 225-day season. Your yard writes its own version of Fair Oaks'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 Fair Oaks’s own scale
7 of the readings below were taken at Fair Oaks's own scale — its own ~225-day season between 28°F freezes, the 3,195 acres it covers and 2,178 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Fair Oaks's own USDA hardiness band, zones 7aUSDA PHZM 2023
- Fair Oaks's own 28°F hard-freeze dates, about Mar 30 and Nov 10 and the ~225-day span between themNOAA 1991–2020 Climate Normals
- 2,178 documented contamination sites on the federal record near Fair Oaks, the closest Brownfields record under a tenth of a mile out from the town centreFederal environmental registers
- Fair Oaks's boundary and the 3,195 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 7a and a ~225-day seasonGrowable Ground crop-matching engine
- The ecoregion at Fair Oaks's own centroid, the PiedmontUS EPA Level III Ecoregions
- A documented spotted-lanternfly record within reach of Fair Oakslydemapr (De Bona & Helmus), 10 km survey lattice
Inherited from a wider read
- Soil character — no town-scale survey exists, so Fair Oaks's 3,195 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 Fair Oaks's 3,195 acreswhy one lot differs from the next →
- Which side of Fair Oaks you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 3,195 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Brownfields 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 Fair Oaks-wide figureread your own land →