When to plant in Triangle, VA
USDA Zone 7bHere are the average frost dates, USDA hardiness zone, and a month-by-month planting calendar for Triangle, Virginia — all computed from Triangle's nearest NOAA weather station.
Zone 7b means many perennials and even some tender shrubs overwinter in Triangle, while your frost dates still decide when annuals go out.
Frost probability
QUANTICO MCAS · 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 Triangle’s own odds, recorded at QUANTICO MCAS.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | Apr 25 | Apr 8 | Mar 27 | Oct 15 | Oct 29 | Nov 10 |
| 32°F | Apr 8 | Mar 28 | Mar 14 | Oct 28 | Nov 8 | Nov 25 |
| 28°F | Mar 30 | Mar 17 | Feb 28 | Nov 7 | Nov 22 | Dec 10 |
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 Triangle, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 31 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.
Triangle planting FAQ
When is the last spring frost in Triangle, VA?
Triangle's average last spring frost falls near March 28 — 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 Triangle, VA?
The first fall frost in Triangle typically arrives around November 8 (50% probability at 32°F). Harvest or protect frost-sensitive crops before then.
What hardiness zone is Triangle in?
Triangle is in USDA hardiness zone 7b. In zone 7b, winters are moderate — most common vegetables grow well in season.
How long is the growing season in Triangle?
There are roughly 225 frost-free days in Triangle (a long growing season), running from the average last frost around March 28 to the first fall frost near November 8.
When should I plant tomatoes in Triangle?
In Triangle, start tomato seeds indoors around January 31–February 14, then transplant seedlings outdoors around April 4 once the danger of frost has passed.
Never miss a window in Triangle
An email when it’s time to start seeds, transplant, and sow — timed to Triangle’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Cherry Hill · 4 km
- Leesylvania · 7 km
- Montclair · 8 km
- Dale City · 12 km
- Woodbridge · 12 km
- Independent Hill · 14 km
- Lake Ridge · 16 km
- Lorton · 19 km
Frost dates recorded at QUANTICO MCAS, 5 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 Triangle, VA — Frost Dates & Zone 7b." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USW00013773. Retrieved from https://blissgarden.com/virginia/triangle.