When to plant in Seguin, TX
USDA Zone 9aSeguin, Texas frost dates, USDA zone, and a full-year planting calendar, drawn from the nearest NOAA station and tuned to the local season.
A generous ~270-day season lets Seguin gardeners direct-sow more and still ripen long-maturity crops like melons and winter squash. In zone 9a, frost is a minor factor for Seguin — most perennials thrive, and annual vegetables can go out early and stay late.
Frost probability
AUSTIN SAN ANTONIO · 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 Seguin’s own odds, recorded at AUSTIN SAN ANTONIO.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | Apr 3 | Mar 13 | Feb 23 | Oct 31 | Nov 15 | Dec 2 |
| 32°F | Mar 20 | Mar 1 | Feb 3 | Nov 8 | Nov 26 | Dec 20 |
| 28°F | Mar 10 | Feb 13 | Jan 11 | Nov 18 | Dec 11 | Jan 16 |
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 Seguin, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 20 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.
Seguin planting FAQ
When is the last spring frost in Seguin, TX?
Plan for the last spring frost in Seguin around March 1 (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 Seguin, TX?
The first fall frost in Seguin typically arrives around November 26 (50% probability at 32°F). Harvest or protect frost-sensitive crops before then.
What hardiness zone is Seguin in?
Seguin is in USDA hardiness zone 9a. In zone 9a, winters are mild — many tender perennials overwinter here.
How long is the growing season in Seguin?
Seguin has about 270 frost-free days — a long growing season — between the average last spring frost (March 1) and first fall frost (November 26).
When should I plant tomatoes in Seguin?
For Seguin, sow tomatoes indoors about January 4–January 18 and move the seedlings out around March 8, after the last spring frost.
Never miss a window in Seguin
An email when it’s time to start seeds, transplant, and sow — timed to Seguin’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- New Braunfels · 19 km
- Cibolo · 24 km
- Schertz · 27 km
- San Marcos · 32 km
- Universal City · 33 km
- Selma · 34 km
- Converse · 34 km
- Live Oak · 36 km
Frost dates recorded at AUSTIN SAN ANTONIO, 14 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 Seguin, TX — Frost Dates & Zone 9a." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USW00012971. Retrieved from https://blissgarden.com/texas/seguin.