When to plant in Manassas, VA
USDA Zone 7aHere are the average frost dates, USDA hardiness zone, and a month-by-month planting calendar for Manassas, Virginia — all computed from Manassas's nearest NOAA weather station.
In zone 7a, Manassas supports a wide range of perennials year-round; the frost dates above are what set your annual vegetable timing.
Frost probability
MANASSAS · 1991–2020The date the last spring and first fall frost occur, by threshold and probability. A 90% date is later in spring — and earlier in fall — than a 10% date; the 50% · 32°F row is what most gardeners plan around. These are Manassas’s own odds, recorded at MANASSAS.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | May 10 | Apr 24 | Apr 11 | Oct 6 | Oct 18 | Oct 30 |
| 32°F | Apr 24 | Apr 12 | Mar 30 | Oct 13 | Oct 27 | Nov 7 |
| 28°F | Apr 14 | Apr 1 | Mar 17 | Oct 24 | Nov 5 | Nov 19 |
Download this table as CSV ↓ — every threshold and probability, plus this city’s planting-window dates.
What to plant now
TODAY · JULY 19Full-year planting calendar
Each bar is the exact window to take a planting action in Manassas, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 23 km · complete 32°F normalsWhen stations disagree by more than a few days, that spread is real microclimate variation — elevation, water, urban heat. Judge which station best matches your own yard.
Manassas planting FAQ
When is the last spring frost in Manassas, VA?
Manassas's average last spring frost falls near April 12 — the 50% mark at 32°F in the 1991–2020 normals. Hold tender transplants until the risk has passed, then plant out.
When is the first fall frost in Manassas, VA?
The first fall frost in Manassas typically arrives around October 27 (50% probability at 32°F). Harvest or protect frost-sensitive crops before then.
What hardiness zone is Manassas in?
Manassas is in USDA hardiness zone 7a. In zone 7a, winters are moderate — most common vegetables grow well in season.
How long is the growing season in Manassas?
Manassas has about 198 frost-free days — a moderate growing season — between the average last spring frost (April 12) and first fall frost (October 27).
When should I plant tomatoes in Manassas?
For Manassas, sow tomatoes indoors about February 15–March 1 and move the seedlings out around April 19, after the last spring frost.
Never miss a window in Manassas
An email when it’s time to start seeds, transplant, and sow — timed to Manassas’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Manassas Park · 4 km
- Buckhall · 5 km
- Sudley · 5 km
- Bull Run · 5 km
- Linton Hall · 8 km
- Centreville · 11 km
- Independent Hill · 12 km
- Fairfax Station · 14 km
Frost dates recorded at MANASSAS, 2 km from the city center · 1991–2020 NOAA climate normals · zone from the USDA/PRISM 2023 map. How we compute this.
BlissGarden. "When to Plant in Manassas, VA — Frost Dates & Zone 7a." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00445204. Retrieved from https://blissgarden.com/virginia/manassas.