When to plant in Frederick, MD
USDA Zone 7bFrederick, Maryland frost dates, USDA zone, and a full-year planting calendar, drawn from the nearest NOAA station and tuned to the local season.
Zone 7b means many perennials and even some tender shrubs overwinter in Frederick, while your frost dates still decide when annuals go out.
Frost probability
FREDERICK POLICE BRKS · 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 Frederick’s own odds, recorded at FREDERICK POLICE BRKS.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | May 2 | Apr 15 | Mar 31 | Oct 9 | Oct 24 | Nov 6 |
| 32°F | Apr 15 | Apr 2 | Mar 17 | Oct 23 | Nov 6 | Nov 24 |
| 28°F | Apr 4 | Mar 21 | Mar 3 | Nov 6 | Nov 21 | Dec 11 |
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 Frederick, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 25 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.
Frederick planting FAQ
When is the last spring frost in Frederick, MD?
On average, the last spring frost in Frederick is around April 2 (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 Frederick, MD?
Expect Frederick's first fall frost near November 6 — a 50% chance of 32°F by that date. Bring in or cover tender crops ahead of it.
What hardiness zone is Frederick in?
Frederick 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 Frederick?
There are roughly 218 frost-free days in Frederick (a long growing season), running from the average last frost around April 2 to the first fall frost near November 6.
When should I plant tomatoes in Frederick?
In Frederick, start tomato seeds indoors around February 5–February 19, then transplant seedlings outdoors around April 9 once the danger of frost has passed.
Never miss a window in Frederick
An email when it’s time to start seeds, transplant, and sow — timed to Frederick’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Ballenger Creek · 6 km
- Linganore · 10 km
- Urbana · 14 km
- Green Valley · 18 km
- Damascus · 26 km
- Clarksburg · 27 km
- Germantown · 32 km
- Montgomery Village · 33 km
Frost dates recorded at FREDERICK POLICE BRKS, 3 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 Frederick, MD — Frost Dates & Zone 7b." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00183348. Retrieved from https://blissgarden.com/maryland/frederick.