When to plant in Duncanville, TX
USDA Zone 8bDuncanville, Texas frost dates, USDA zone, and a full-year planting calendar, drawn from the nearest NOAA station and tuned to the local season.
Zone 8b means many perennials and even some tender shrubs overwinter in Duncanville, while your frost dates still decide when annuals go out.
Frost probability
JOE POOL LAKE · 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 Duncanville’s own odds, recorded at JOE POOL LAKE.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | Apr 21 | Mar 31 | Mar 12 | Oct 19 | Nov 3 | Nov 22 |
| 32°F | Apr 8 | Mar 20 | Feb 28 | Oct 27 | Nov 13 | Dec 3 |
| 28°F | Mar 25 | Mar 8 | Feb 17 | Nov 3 | Nov 25 | Dec 13 |
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 Duncanville, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 17 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.
Duncanville planting FAQ
When is the last spring frost in Duncanville, TX?
On average, the last spring frost in Duncanville is around March 20 (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 Duncanville, TX?
In Duncanville, the first 32°F freeze of fall lands around November 13 on average. Time your last harvests and any season-extension cover before it.
What hardiness zone is Duncanville in?
Duncanville is in USDA hardiness zone 8b. In zone 8b, winters are mild — many tender perennials overwinter here.
How long is the growing season in Duncanville?
There are roughly 238 frost-free days in Duncanville (a long growing season), running from the average last frost around March 20 to the first fall frost near November 13.
When should I plant tomatoes in Duncanville?
In Duncanville, start tomato seeds indoors around January 23–February 6, then transplant seedlings outdoors around March 27 once the danger of frost has passed.
Never miss a window in Duncanville
An email when it’s time to start seeds, transplant, and sow — timed to Duncanville’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- DeSoto · 7 km
- Cedar Hill · 8 km
- Grand Prairie · 11 km
- Glenn Heights · 12 km
- Lancaster · 14 km
- Red Oak · 19 km
- Arlington · 21 km
- Midlothian · 21 km
Frost dates recorded at JOE POOL LAKE, 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 Duncanville, TX — Frost Dates & Zone 8b." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00414597. Retrieved from https://blissgarden.com/texas/duncanville.