The Northern Virginia (DC Metro) spans USDA hardiness zones 7b-8a — enough range to grow cool-season vegetables, hardy fruit, and warm-season crops that mature before the first hard frost.
Inside the Beltway, the DC urban heat island and the tidal Potomac push Arlington, Alexandria, and Falls Church to zone 7b–8a and 240–258 frost-free days — roughly a half-zone warmer and up to 40 days longer-season than the 7a Piedmont (Loudoun, Fauquier) just 30 miles west. Generic Virginia planting-calendar advice starts and ends too early for this warm inner-suburb core. The conditions favor tomato, grape, dogwood, and apple, among others — though every individual site edits that list with its own soil, sun, and drainage.
The Northern Virginia (DC Metro) spans Virginia.
Your yard isn't all of the Northern Virginia (DC Metro).
The Northern Virginia (DC Metro) spans USDA zones 7b-8a, but your parcel sits in exactly one — and slope, tree cover, and low spots nudge it further. 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 Northern Virginia (DC Metro) — soil, climate, flood, and parcel records. How we handle your address.
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The Northern Virginia (DC Metro) — the short answer
The Northern Virginia (DC Metro): USDA zones 7b-8a, 227–258 frost-free days depending where in it you stand, in Virginia.
- USDA zones
- 7b-8a
- USDA PHZM 2023, aggregated over the footprint
- Shortest season here
- 227 days
- NOAA Regional Climate Centers ACIS, 1991-2020 — Fairfax County
- Counties
- 5
- US Census TIGER/Line 2025
- Region type
- County cluster
- Growable Ground growing-region registry
Region boundary: Growable Ground growing-region registry — curated county clusters, EPA Level III ecoregions, and town clusters drawn finer than any county. The season figure is this region's own record, measured across its 5 member counties, not a state or national average.
Hardiness Zone Range
The Northern Virginia (DC Metro) is not one growing season
One answer for the Northern Virginia (DC Metro) averages 5 counties whose growing seasons are 31 days apart — from 227 frost-free days in Fairfax County to 258 in Alexandria County. That is the same region, measured the same way, in the same years. Which end of it your land sits nearer decides what finishes before the first hard freeze.
The middle half of 5 counties runs 227–255 days, with a median of 240 days — a 31-day span end to end.
Measured across 5 member counties, each carrying its own 28°F normal. NOAA Regional Climate Centers ACIS, 1991-2020. A member with no own record is absent from the range rather than counted as zero — nothing here is interpolated to the region. Your own site sits somewhere inside this range; a parcel report resolves where.
What Grows in the Northern Virginia (DC Metro)
All 1 of the plants below that publish a season requirement clear even Fairfax County’s 227 frost-free days — so on season alone, this grid works at both ends of the region. The 31-day spread still decides how far past this list you can push, and how early you can start.
Plants matched to the Northern Virginia (DC Metro)'s USDA zones 7b-8a, ordered by how much hardiness margin each has across the region — the ones with room to spare at both ends of this band lead. Each links to its full growing profile.
Native Plants of the Northern Virginia (DC Metro)
Plants the USDA PLANTS Database documents as native and present in this region’s state, kept only where the published hardiness range meets the Northern Virginia (DC Metro)’s USDA zones 7b-8a — closest range match first. Presence is recorded by state, so a plant can be documented across the state and still be scarce in your corner of the region.
The ground across the Northern Virginia (DC Metro)
The USDA soil survey maps this ground county by county. These are those records weighted by land area across five member counties — this region’s own profile, not a state figure.
The ground is predominantly Ultisols, at 49% of mapped acres, followed by Entisols (32%), Inceptisols (10%) and Alfisols (9%). Six soil orders appear somewhere inside the footprint, which is the honest reason a regional soil answer only goes so far. The most extensive named soils are Glenelg, Wheaton, and Codorus.
60% of those acres are well drained, and another 9% somewhat poorly drained, 5% moderately well drained. Topsoil pH runs 4.6–7.5 between the lowest and the highest county on record. 10% of the footprint is classed prime farmland.
Soil order
Ultisols
Drainage
Well drained
Topsoil pH
4.6–7.5
Hydric soils
4%
Soil changes across a driveway, so which of these your own ground sits on is a parcel question rather than a regional one. Fairfax County holds the most wetland ground here, at 5% — soil types explained.
USDA NRCS SSURGO via Soil Data Access
What this means for growing in the Northern Virginia (DC Metro)
The soil survey reads this ground county by county, and the readings above are those records summed across the Northern Virginia (DC Metro). Here is what they mean for a garden here — and the move an experienced grower makes about each one.
Drainage
From county records60% of the mapped acres across the Northern Virginia (DC Metro) are well drained — ground that drains quickly. That is area-weighted across all five of its mapped counties.
The upside is soil you can work early in spring and roots that never drown; the cost is that fast-draining ground dries out fast and leaches nutrients away before plants can use them.
Work in compost and mulch to hold moisture and feed, and water more often in short doses than deep and rarely.
USDA NRCS SSURGO
Surface pH
From county recordsTopsoil across the Northern Virginia (DC Metro) runs pH 4.6–7.5 — acidic in three of its five counties.
Blueberries, potatoes, and rhododendrons thrive in it, but most vegetables start locking out nutrients below about pH 6.0 and grow pale and stunted no matter how much you feed them.
A measured lime application raises pH for the crops that need it — but test first, because the right rate depends on your own soil, not the county average.
USDA NRCS SSURGO
Safe to Grow Here?
What the federal record shows across the Northern Virginia (DC Metro) — and how to grow with it.
Across the Northern Virginia (DC Metro)'s 5 counties the federal record holds 3,677 documented sites, mostly Underground Storage Tanks (1,994), Brownfields (1,517) and Toxics Release Inventory (95). The heaviest single county is Fairfax County, with 2,423.
That is a regional count, not a reading of any one lot — proximity to a documented site is information, not a diagnosis. Open the map outlined to the Northern Virginia (DC Metro) to see which records sit where you actually grow.
Sources Checked
Summed across the 5 counties in the Northern Virginia (DC Metro)
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.
Sources: EPA, USGS — 1.8M documented sites tracked nationwide across 9 federal source types.
Your land is one point inside the Northern Virginia (DC Metro)
Everything above resolves to the Northern Virginia (DC Metro) as a whole — a footprint whose own counties record seasons 31 days apart, and hardiness across zones 7b-8a. Your parcel sits at one point in that range, not in the middle of it. 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 region 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 regional average.
Your Lot vs the Northern Virginia (DC Metro) Average
Northern Virginia (DC Metro) Average
- ●USDA Zones 7b-8a, averaged across Northern Virginia (DC Metro)
- ●One soil character for all of Northern Virginia (DC Metro)
- ●State-average frost dates
YOUR Parcel
- ✓Your exact zone, not Northern Virginia (DC Metro)'s 7b-8a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your parcel in the Northern Virginia (DC Metro)
Pull a site-specific report for your exact address in the Northern Virginia (DC Metro) — soil, sun, drainage, frost risk, contamination, and scored plant recommendations.
Three things about your lot that Northern Virginia (DC Metro) averages can't show:
We read public map data around The Northern Virginia (DC Metro) — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Northern Virginia (DC Metro) average
How we know this about the Northern Virginia (DC Metro)
The boundary: a cluster of neighboring counties. Growing regions have no official boundary, so this footprint is our published one, and every figure on this page was measured over the counties inside it rather than borrowed from the state around it.
The datasets: hardiness from the USDA ARS Plant Hardiness Zone Map 2023, aggregated across the footprint; the growing season from NOAA Regional Climate Centers ACIS 1991–2020 28°F normals, read at each member’s own record; boundaries from US Census TIGER/Line 2025; the contamination record from the federal sources named in that beat above; the soil from the USDA NRCS SSURGO survey, read at each member county’s own record and weighted to this footprint by land area. Where a member carries no record of its own, it is absent from the figure rather than filled in.
Common questions about the Northern Virginia (DC Metro)
What hardiness zone is the Northern Virginia (DC Metro)?
The Northern Virginia (DC Metro) spans USDA hardiness zones 7b-8a, aggregated from the USDA Agricultural Research Service Plant Hardiness Zone Map 2023 across the region's counties. Zones reflect average annual extreme minimum temperatures from 1991–2020 data.
How long is the growing season in the Northern Virginia (DC Metro)?
Measured between 28°F hard freezes, the Northern Virginia (DC Metro)'s counties mostly run 227 to 255 frost-free days, median 240 (NOAA Regional Climate Centers ACIS, 1991–2020, over 5 member counties). That 28-day spread is the honest read — no single season describes 5 counties, and each county guide below carries its own.
When does frost risk end in the Northern Virginia (DC Metro)?
Across the Northern Virginia (DC Metro), the middle half of member counties see their last 28°F hard freeze between Mar 16 and Mar 29 (median Mar 23), and their first fall freeze between Nov 11 and Nov 26. Those are hard freezes, not the last light frost: tender transplants wait for about Apr 13, and elevation decides which end of a 13-day spread you garden in.
What grows well in the Northern Virginia (DC Metro)?
The Northern Virginia (DC Metro)'s conditions suit plants such as Tomato, Grape, Dogwood, Apple, Peanut. What actually thrives on any one site still turns on its specific soil, sun, and drainage — we score each plant against the real conditions at your address.
How is the Northern Virginia (DC Metro) defined?
The Northern Virginia (DC Metro) is defined here as a curated cluster of 5 neighboring counties that share a growing character. Growing regions have no official boundary, so this footprint is our published one — every county in it is named on this page.
Which states does the Northern Virginia (DC Metro) cover?
The Northern Virginia (DC Metro) spans Virginia. Each state's full growing guide is linked on this page.
What other growing regions cover the same states?
Appalachia, Piedmont, Tidewater & Chesapeake, Blue Ridge, Delmarva Peninsula, and Hampton Roads / Coastal Southeast Virginia share at least one state with the Northern Virginia (DC Metro). Growing regions overlap and interlock — a single address can sit inside more than one, which is why the precise read is always the parcel, not the region.
What this page reads at the Northern Virginia (DC Metro)’s own scale
6 of the readings below were taken at the Northern Virginia (DC Metro)'s own scale — the zone 7b-8a band across its footprint, a median 240-day season across its 5 counties and 3,677 documented federal contamination records across its 5 counties, 2,423 of them in Fairfax County alone; one is borrowed from a wider read, named and linked below.
Measured here
- The USDA hardiness band 7b-8a aggregated across all 5 counties in the footprintUSDA PHZM 2023
- The boundary itself — the 5 counties this region is curated fromGrowable Ground subregion registry
- The growing character that makes this region distinct from the states it crossesGrowable Ground subregion registry
- The 28°F season across the footprint — the middle half of its 5 counties run 227 to 255 frost-free days, median 240NOAA Regional Climate Centers ACIS, 1991-2020
- The federal contamination record over the whole footprint — 3,677 documented federal contamination records across its 5 counties, 2,423 of them in Fairfax County aloneEPA, USGS and USDA federal site records
- The soil order mix across the footprint — 49% Ultisols, topsoil pH 4.6–7.5, area-weighted across its 5 mapped countiesUSDA NRCS SSURGO
Inherited from a wider read
- The candidate plant list — its state's curated sets, merged and filtered to zones 7b-8afrom Virginia
What this page can’t tell you
- Which end of the 28-day range your ground sits at — 227 days at one extreme, 255 at the other, decided mostly by elevationfrost dates explained →
- Which of those soils your own ground sits on — the survey maps them county-wide, and they change across a drivewaysoil types explained →
- The soil pH, drainage, sun hours, and frost pockets on one specific lotwhy one lot differs from the next →
Explore the Northern Virginia (DC Metro)
State growing guides
Counties in this region
Other growing regions across Virginia
The vast eastern mountain region of steep hollows, thin acidic soils, and short upland seasons — apples, brambles, ramps, and forest crops on hard-won ground. (Union of the core Appalachian ecoregions.)
The rolling foothill belt between the Appalachians and the coastal plain, defined by heavy red clay soils that reward amendment and drainage. (Southern Piedmont; the Northern Piedmont is a separate ecoregion.)
The low, flat, tidal coastal plain around Chesapeake Bay — sandy soils, mild maritime winters, and a long season for vegetables and Southern staples.
The high, cool, forested spine of the southern Appalachians — layered ridges, acidic mountain loams, and a short upland season suited to apples and cold-hardy crops.
A flat coastal-plain peninsula of sandy, well-drained soils between the Chesapeake and the Atlantic — a major sweet-corn, soybean, and produce region.
The only USDA zone 8b band in Virginia. Atlantic and Chesapeake Bay maritime moderation plus dense urban heat give the waterfront cities of Hampton Roads the state's warmest winters and longest season — roughly 276 to 289 frost-free days on the water (Hampton runs 289), about 60 days longer than the inland coastal plain and over 100 days longer than the mountains. Growers here overwinter hardy greens and roots, and figs and other tender perennials that fail elsewhere in Virginia routinely survive. Inland edges of the metro — Chesapeake, Suffolk, Isle of Wight, Newport News — cool to 8a, so the frost-free window shortens as you move off the tidal shoreline.