When to plant in Clarksburg, MD
USDA Zone 7bClarksburg, Maryland frost dates, USDA zone, and a full-year planting calendar, drawn from the nearest NOAA station and tuned to the local season.
In zone 7b, Clarksburg supports a wide range of perennials year-round; the frost dates above are what set your annual vegetable timing.
Frost probability
DAMASCUS 3 SSW · 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 Clarksburg’s own odds, recorded at DAMASCUS 3 SSW.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | May 15 | Apr 28 | Apr 14 | Oct 5 | Oct 17 | Oct 31 |
| 32°F | May 2 | Apr 14 | Mar 31 | Oct 13 | Oct 29 | Nov 12 |
| 28°F | Apr 16 | Apr 2 | Mar 18 | Oct 26 | Nov 8 | Nov 24 |
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 Clarksburg, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 26 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.
Clarksburg planting FAQ
When is the last spring frost in Clarksburg, MD?
On average, the last spring frost in Clarksburg is around April 14 (50% probability at 32°F, from 1991–2020 NOAA normals). Wait until after this date to set out tender plants like tomatoes and peppers.
When is the first fall frost in Clarksburg, MD?
The first fall frost in Clarksburg typically arrives around October 29 (50% probability at 32°F). Harvest or protect frost-sensitive crops before then.
What hardiness zone is Clarksburg in?
Clarksburg 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 Clarksburg?
Clarksburg has about 198 frost-free days — a moderate growing season — between the average last spring frost (April 14) and first fall frost (October 29).
When should I plant tomatoes in Clarksburg?
For Clarksburg, sow tomatoes indoors about February 17–March 3 and move the seedlings out around April 21, after the last spring frost.
Never miss a window in Clarksburg
An email when it’s time to start seeds, transplant, and sow — timed to Clarksburg’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Germantown · 5 km
- Montgomery Village · 6 km
- Damascus · 8 km
- Flower Hill · 9 km
- Gaithersburg · 10 km
- Urbana · 13 km
- Green Valley · 13 km
- North Potomac · 14 km
Frost dates recorded at DAMASCUS 3 SSW, 6 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 Clarksburg, MD — Frost Dates & Zone 7b." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00182336. Retrieved from https://blissgarden.com/maryland/clarksburg.