When to plant in Southlake, TX
USDA Zone 8bHere are the average frost dates, USDA hardiness zone, and a month-by-month planting calendar for Southlake, Texas — all computed from Southlake's nearest NOAA weather station.
A generous ~248-day season lets Southlake gardeners direct-sow more and still ripen long-maturity crops like melons and winter squash. In zone 8b, Southlake supports a wide range of perennials year-round; the frost dates above are what set your annual vegetable timing.
Frost probability
GRAPEVINE DAM · 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 Southlake’s own odds, recorded at GRAPEVINE DAM.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | Apr 15 | Mar 29 | Mar 8 | Oct 26 | Nov 7 | Nov 23 |
| 32°F | Apr 3 | Mar 14 | Feb 23 | Nov 2 | Nov 17 | Dec 4 |
| 28°F | Mar 20 | Mar 1 | Feb 4 | Nov 9 | Nov 29 | Dec 20 |
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 Southlake, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 16 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.
Southlake planting FAQ
When is the last spring frost in Southlake, TX?
Southlake's average last spring frost falls near March 14 — 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 Southlake, TX?
Expect Southlake's first fall frost near November 17 — a 50% chance of 32°F by that date. Bring in or cover tender crops ahead of it.
What hardiness zone is Southlake in?
Southlake is in USDA hardiness zone 8b. In zone 8b, winters are mild — many tender perennials overwinter here.
How long is the growing season in Southlake?
Southlake has about 248 frost-free days — a long growing season — between the average last spring frost (March 14) and first fall frost (November 17).
When should I plant tomatoes in Southlake?
For Southlake, sow tomatoes indoors about January 17–January 31 and move the seedlings out around March 21, after the last spring frost.
Never miss a window in Southlake
An email when it’s time to start seeds, transplant, and sow — timed to Southlake’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Trophy Club · 5 km
- Colleyville · 7 km
- Grapevine · 7 km
- Keller · 7 km
- Flower Mound · 10 km
- Roanoke · 10 km
- Bedford · 12 km
- North Richland Hills · 12 km
Frost dates recorded at GRAPEVINE DAM, 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 Southlake, TX — Frost Dates & Zone 8b." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00413691. Retrieved from https://blissgarden.com/texas/southlake.