When to plant in Walker Mill, MD
USDA Zone 7bHere are the average frost dates, USDA hardiness zone, and a month-by-month planting calendar for Walker Mill, Maryland — all computed from Walker Mill's nearest NOAA weather station.
In zone 7b, Walker Mill supports a wide range of perennials year-round; the frost dates above are what set your annual vegetable timing.
The average first fall frost in Walker Mill is now 5 days later than in the 1981–2010 normals. See how frost dates are shifting nationwide →
Frost probability
NATL ARBORETUM DC · 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 Walker Mill’s own odds, recorded at NATL ARBORETUM DC.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | Apr 28 | Apr 10 | Mar 29 | Oct 14 | Oct 29 | Nov 10 |
| 32°F | Apr 11 | Mar 29 | Mar 15 | Oct 26 | Nov 8 | Nov 23 |
| 28°F | Mar 31 | Mar 17 | Mar 2 | Nov 6 | Nov 20 | Dec 7 |
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 Walker Mill, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 13 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.
Walker Mill planting FAQ
When is the last spring frost in Walker Mill, MD?
Walker Mill's average last spring frost falls near March 29 — 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 Walker Mill, MD?
Expect Walker Mill's first fall frost near November 8 — a 50% chance of 32°F by that date. Bring in or cover tender crops ahead of it.
What hardiness zone is Walker Mill in?
Walker Mill 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 Walker Mill?
Walker Mill has about 224 frost-free days — a long growing season — between the average last spring frost (March 29) and first fall frost (November 8).
When should I plant tomatoes in Walker Mill?
For Walker Mill, sow tomatoes indoors about February 1–February 15 and move the seedlings out around April 5, after the last spring frost.
Never miss a window in Walker Mill
An email when it’s time to start seeds, transplant, and sow — timed to Walker Mill’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Forestville · 3 km
- Summerfield · 4 km
- Suitland · 4 km
- Largo · 5 km
- Landover · 5 km
- Lake Arbor · 6 km
- Westphalia · 7 km
- Camp Springs · 8 km
Frost dates recorded at NATL ARBORETUM DC, 8 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 Walker Mill, MD — Frost Dates & Zone 7b." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00186350. Retrieved from https://blissgarden.com/maryland/walker-mill.