Manassas Park city, in Virginia, sits in USDA hardiness zone 7a — a band that supports both cool-season staples and warm-season crops chosen to fit the local frost window.
Well-matched crops include cabbage, hazelnut, california poppy, and collard greens, and the gap between "grows in the area" and "grows in your yard" is closed by soil, sun, and drainage.
Manassas Park city lies within the Piedmont — a regional growing area with its own character.
Grounded in USDA PHZM 2023 · Growable Ground suitability scoring · NOAA 1991–2020 Climate Normals
Manassas Park city holds more than one microclimate.
Soils and elevations shift across Manassas Park city, so your frost dates and drainage aren't the county average. 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 Manassas Park city — soil, climate, flood, and parcel records. How we handle your address.
No card required · your full report in seconds
Manassas Park city — the short answer
Manassas Park city, Virginia: USDA zone 7a, about 220 days between hard freezes, across 2K acres.
- USDA zone
- 7a
- USDA PHZM 2023
- Last hard freeze (28°F)
- Mar 29
- NOAA 1991–2020 Climate Normals, 28°F
- First hard freeze (28°F)
- Nov 4
- NOAA 1991–2020 Climate Normals, 28°F
- Days between freezes
- ~220
- NOAA 1991–2020 Climate Normals, 28°F
- County area
- 2K acres
- US Census TIGER/Line 2025
Every figure names the dataset it came from. Hard-freeze dates are county 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 Manassas Park city's average, not your lot's — a low corner or a tree line moves it. Against Manassas Park city's 220-day season, see what your own ground reads.
Heat in Manassas Park city
Across a year, Manassas Park city accumulates about 3,657 growing degree days above 50°F, about 77 fewer than the middle Virginia county — ahead of 52 of Virginia’s 133 counties. Degree days are the heat a crop actually gets to work with — more of them is more room to ripen a long-season crop before the freeze closes the window.
Grounded in PRISM Climate Group, Oregon State University — 1991–2020 monthly normals
Soil in Manassas Park County
Detailed USDA soil-survey (SSURGO) mapping is limited across Manassas Park County, so there isn't a reliable county-wide soil summary to show here yet — a gap in the national survey, not in the ground itself.
Soil still varies lot by lot — soil types explained.
What this means for growing in Manassas Park city
Each reading below is measured for Manassas Park city itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredManassas Park city runs about 220 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
MeasuredManassas Park city 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 Manassas Park city is in
Manassas Park city sits in the Northern Piedmont — EPA Level III, inside the wider Eastern Temperate Forests. One consistent ecological setting across the whole county.
What Grows in Manassas Park city
We scored all 1,086 plants against Manassas Park city's own USDA zone 7a and its own 220-day season between hard freezes, using the same matching engine that runs a full parcel report. These cleared both. Sun, soil pH and drainage vary lot by lot — those are the parcel questions below. Each card opens that plant's Virginia profile.
Is it too late to plant in Manassas Park city?
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 Mar 1; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Mar 29 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Nov 4 — 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 Manassas Park city
Spotted lanternfly documented 3 miles from Manassas Park city, first recorded 2022. What to watch for.
Safe to Grow Here?
What the federal record shows across Manassas Park County — and how to grow with it.
We checked the federal record across Manassas Park County — 49 documented sites across 3 of the 9 source types we track.
The most significant on record: 30 brownfield sites. Former commercial or industrial land where legacy contamination may persist.
The federal record across Manassas Park County is light. Growing food here starts from a strong position — a quick pass over the map tells you whether any recorded site sits near your land, and if one does, that's information to plant with, not a reason to stop.
Sources: EPA, USGS — 1.8M documented sites tracked nationwide across 9 federal source types.
What's on the federal record near Manassas Park city
Closest first, across Manassas Park County. Listing isn't leaking, and distance isn't exposure.
- D & K DIESEL INCBrownfields · 800 ft
- 7 Eleven 28505Underground Storage Tanks · 850 ft
- AMERICAN STRIPPINGBrownfields · 1000 ft
- MANASSAS QUALITY AUTO BODY INCORPORATEDBrownfields · 1000 ft
- CW Strittmatter IncorporatedUnderground Storage Tanks · 1000 ft
- MERRIFIELD DEVELOPMENTUnderground Storage Tanks · 1100 ft
- Q-CARD #607Underground Storage Tanks · 1100 ft
- Spring Valley ConcreteUnderground Storage Tanks · 1100 ft
- OWENS & DOVEUnderground Storage Tanks · 1100 ft
- BURTON & ROBINSON IncorporatedUnderground Storage Tanks · 1100 ft
- MASTERCRAFT AUTO BODYBrownfields · 1200 ft
- HUGHES SUPPLY #HDHG 0932Brownfields · 1300 ft
6 more sites are on the record inside the same radius. See them on the map
Measured from Manassas Park city'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 Manassas Park city.
Sources Checked
across Manassas Park County
Severity Distribution
across Manassas Park County
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Manassas Park city, Brownfields runs higher than the national average — 30 sites across Manassas Park County. Knowing it is half the work — and it's nothing a thoughtful grower can't plan for.
Brownfields: Brownfield sites are former commercial or industrial properties where legacy soil contamination (heavy metals, PAHs, petroleum compounds) may persist.
Check EPA brownfield remediation status — many sites have completed cleanup with institutional controls.
Check your specific parcel in Manassas Park city
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 Manassas Park city average
Your land is one point inside Manassas Park city
Everything above resolves to Manassas Park city as a whole — one PHZM band and one county frost record, read across 2K 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 county 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 county average.
Your Lot vs the Manassas Park city Average
Manassas Park city Average
- ●USDA Zones 7a, averaged across Manassas Park city
- ●One soil character for all of Manassas Park city
- ●Frost dates read at Manassas Park city's scale: Mar 29 to Nov 4
YOUR Parcel
- ✓Your exact zone, not Manassas Park city's 7a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your parcel in Manassas Park city
Pull a site-specific report for your exact address in Manassas Park city, Virginia — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Manassas Park city averages can't show:
We read public map data around Manassas Park city — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Manassas Park city average
How we know this about Manassas Park city
The datasets: hardiness from the USDA ARS Plant Hardiness Zone Map 2023, read at county grain; hard-freeze dates from NOAA 1991–2020 28°F normals at this county’s own record where one resolves, and the labelled statewide window where none does; soils from the USDA NRCS SSURGO survey, area-weighted across the county’s own map units; boundaries and acreage from US Census TIGER/Line 2025; the contamination and pesticide records from the federal sources named in their beats above. Where Manassas Park city carries no record of its own, the figure is inherited and labelled — the resolution ledger below names each.
Common questions about Manassas Park city
When does frost risk typically end in Manassas Park city?
The last hard freeze (28°F) in Manassas Park city typically lands around Mar 29, 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 19.
How long is the growing season in Manassas Park city?
Measured between 28°F hard freezes, Manassas Park city sees about 220 frost-free days — roughly Mar 29 through Nov 4, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Apr 19 to Oct 21, about 185 days.
Is the soil safe to grow vegetables in Manassas Park city?
The federal record around Manassas Park city is light — 49 documented sites across the 9 federal source types we checked, mostly Brownfields entries (30), the nearest Brownfields record about 0.2 miles out — and proximity to a documented site is information, not a diagnosis of any one yard. Growing food here starts from a strong position; a soil test before new food beds settles any site-specific question.
Everything above is measured at Manassas Park city's scale — its 7a band and its 220-day season. Your yard writes its own version of Manassas Park city's numbers: we read soil, sun, drainage and frost at your exact address. Try it for 14 days — no card required.
Will It Grow Here?
Zone fit is the first question — each answer below reads Virginia's frost window, season length, and soil profile against the plant's real requirements.
What this page reads at Manassas Park city’s own scale
6 of the readings below were taken at Manassas Park city's own scale — its own ~220-day span between 28°F freezes and 49 documented sites inside its boundary; 2 are borrowed from a wider read, named and linked below.
Measured here
- Manassas Park city's own USDA hardiness band, zones 7aUSDA PHZM 2023
- Manassas Park city's own 28°F hard-freeze dates and its ~220-day span between themNOAA 1991–2020 Climate Normals
- 49 documented contamination sites inside the county boundary, distance-sorted from its center — the closest Brownfields record about 0.2 miles outFederal environmental registers
- Manassas Park city's boundary and the 1,936 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 7a and a ~220-day seasonGrowable Ground crop-matching engine
- Manassas Park city sitting wholly inside the Northern PiedmontUS EPA Level III Ecoregions
Inherited from a wider read
What this page can’t tell you
- How the season shifts across Manassas Park city — the ~220 days above is one reading at its centre; the 12 towns below each carry their owntowns in this county →
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Manassas Park city's 1,936 acreswhy one lot differs from the next →
- Which of those 49 documented sites actually reaches your soil — that needs your address, the wind, and the groundwater directionhow we read the record →
- Where cold air settles, which slopes face the sun, and which way the wind runs on your own ground — none of it survives being averaged over Manassas Park cityread your own land →