When to plant in Green Valley, MD
USDA Zone 7aGreen Valley, Maryland frost dates, USDA zone, and a full-year planting calendar, drawn from the nearest NOAA station and tuned to the local season.
Zone 7a means many perennials and even some tender shrubs overwinter in Green Valley, while your frost dates still decide when annuals go out.
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 Green Valley’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 Green Valley, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 28 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.
Green Valley planting FAQ
When is the last spring frost in Green Valley, MD?
Plan for the last spring frost in Green Valley around April 14 (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 Green Valley, MD?
Expect Green Valley's first fall frost near October 29 — a 50% chance of 32°F by that date. Bring in or cover tender crops ahead of it.
What hardiness zone is Green Valley in?
Green Valley is in USDA hardiness zone 7a. In zone 7a, winters are moderate — most common vegetables grow well in season.
How long is the growing season in Green Valley?
There are roughly 198 frost-free days in Green Valley (a moderate growing season), running from the average last frost around April 14 to the first fall frost near October 29.
When should I plant tomatoes in Green Valley?
In Green Valley, start tomato seeds indoors around February 17–March 3, then transplant seedlings outdoors around April 21 once the danger of frost has passed.
Never miss a window in Green Valley
An email when it’s time to start seeds, transplant, and sow — timed to Green Valley’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Damascus · 9 km
- Urbana · 9 km
- Linganore · 10 km
- Clarksburg · 13 km
- Ballenger Creek · 16 km
- Montgomery Village · 17 km
- Frederick · 18 km
- Germantown · 19 km
Frost dates recorded at DAMASCUS 3 SSW, 9 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 Green Valley, MD — Frost Dates & Zone 7a." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00182336. Retrieved from https://blissgarden.com/maryland/green-valley.