When to plant in Sonterra, TX
USDA Zone 8bSonterra, Texas frost dates, USDA zone, and a full-year planting calendar, drawn from the nearest NOAA station and tuned to the local season.
With about 263 frost-free days, Sonterra supports back-to-back plantings; stagger sowings every few weeks to keep beds productive spring through fall. Sonterra's nearest full-normals station sits about 19 km out, so treat these as a close estimate — local microclimate can nudge your first and last frost. Zone 8b means many perennials and even some tender shrubs overwinter in Sonterra, while your frost dates still decide when annuals go out.
Frost probability
GEORGETOWN 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 Sonterra’s own odds, recorded at GEORGETOWN LAKE.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | Apr 10 | Mar 22 | Mar 1 | Oct 31 | Nov 13 | Dec 1 |
| 32°F | Mar 30 | Mar 6 | Feb 13 | Nov 5 | Nov 24 | Dec 10 |
| 28°F | Mar 16 | Feb 23 | Jan 24 | Nov 15 | Dec 5 | Jan 1 |
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 Sonterra, 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.
Sonterra planting FAQ
When is the last spring frost in Sonterra, TX?
On average, the last spring frost in Sonterra is around March 6 (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 Sonterra, TX?
The first fall frost in Sonterra typically arrives around November 24 (50% probability at 32°F). Harvest or protect frost-sensitive crops before then.
What hardiness zone is Sonterra in?
Sonterra is in USDA hardiness zone 8b. In zone 8b, winters are mild — many tender perennials overwinter here.
How long is the growing season in Sonterra?
There are roughly 263 frost-free days in Sonterra (a long growing season), running from the average last frost around March 6 to the first fall frost near November 24.
When should I plant tomatoes in Sonterra?
In Sonterra, start tomato seeds indoors around January 9–January 23, then transplant seedlings outdoors around March 13 once the danger of frost has passed.
Never miss a window in Sonterra
An email when it’s time to start seeds, transplant, and sow — timed to Sonterra’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Georgetown · 18 km
- Harker Heights · 28 km
- Belton · 29 km
- Hutto · 30 km
- Taylor · 31 km
- Round Rock · 32 km
- Killeen · 33 km
- Brushy Creek · 36 km
Frost dates recorded at GEORGETOWN LAKE, 19 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 Sonterra, TX — Frost Dates & Zone 8b." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00413507. Retrieved from https://blissgarden.com/texas/sonterra.