When to plant in Westphalia, MD
USDA Zone 7bHere are the average frost dates, USDA hardiness zone, and a month-by-month planting calendar for Westphalia, Maryland — all computed from Westphalia's nearest NOAA weather station.
In zone 7b, Westphalia supports a wide range of perennials year-round; the frost dates above are what set your annual vegetable timing.
Frost probability
UPPER MARLBORO 3 NNW · 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 Westphalia’s own odds, recorded at UPPER MARLBORO 3 NNW.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | May 12 | Apr 24 | Apr 8 | Oct 5 | Oct 19 | Nov 1 |
| 32°F | Apr 24 | Apr 9 | Mar 27 | Oct 14 | Oct 29 | Nov 11 |
| 28°F | Apr 12 | Mar 30 | Mar 14 | Oct 27 | Nov 10 | Nov 25 |
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 Westphalia, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 15 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.
Westphalia planting FAQ
When is the last spring frost in Westphalia, MD?
Plan for the last spring frost in Westphalia around April 9 (the date it has a 50% chance of a 32°F freeze). Anything frost-sensitive should go out after it.
When is the first fall frost in Westphalia, MD?
In Westphalia, the first 32°F freeze of fall lands around October 29 on average. Time your last harvests and any season-extension cover before it.
What hardiness zone is Westphalia in?
Westphalia 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 Westphalia?
Westphalia has about 203 frost-free days — a moderate growing season — between the average last spring frost (April 9) and first fall frost (October 29).
When should I plant tomatoes in Westphalia?
For Westphalia, sow tomatoes indoors about February 12–February 26 and move the seedlings out around April 16, after the last spring frost.
Never miss a window in Westphalia
An email when it’s time to start seeds, transplant, and sow — timed to Westphalia’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Forestville · 4 km
- Largo · 4 km
- Kettering · 6 km
- Walker Mill · 7 km
- Brock Hall · 7 km
- Lake Arbor · 8 km
- Rosaryville · 8 km
- Summerfield · 8 km
Frost dates recorded at UPPER MARLBORO 3 NNW, 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 Westphalia, MD — Frost Dates & Zone 7b." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00189070. Retrieved from https://blissgarden.com/maryland/westphalia.