When to plant in Cibolo, TX
USDA Zone 9aCibolo, Texas frost dates, USDA zone, and a full-year planting calendar, drawn from the nearest NOAA station and tuned to the local season.
Cibolo enjoys a long ~287-day frost-free season — you can succession-sow, fit in a second crop, and grow long-season heat-lovers with room to spare. In zone 9a, frost is a minor factor for Cibolo — most perennials thrive, and annual vegetables can go out early and stay late.
Frost probability
RANDOLPH AFB · 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 Cibolo’s own odds, recorded at RANDOLPH AFB.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | Mar 26 | Mar 6 | Feb 13 | Nov 4 | Nov 24 | Dec 10 |
| 32°F | Mar 14 | Feb 21 | Jan 10 | Nov 16 | Dec 5 | Jan 1 |
| 28°F | Mar 5 | Jan 26 | Dec 18 | Nov 28 | Dec 19 | Feb 1 |
Download this table as CSV ↓ — every threshold and probability, plus this city’s planting-window dates.
What to plant now
TODAY · JULY 19Nothing new to sow or transplant outdoors in the next few weeks — a seasonal lull. Check the full-year calendar below for the next window.
Full-year planting calendar
Each bar is the exact window to take a planting action in Cibolo, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 24 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.
Cibolo planting FAQ
When is the last spring frost in Cibolo, TX?
On average, the last spring frost in Cibolo is around February 21 (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 Cibolo, TX?
In Cibolo, the first 32°F freeze of fall lands around December 5 on average. Time your last harvests and any season-extension cover before it.
What hardiness zone is Cibolo in?
Cibolo is in USDA hardiness zone 9a. In zone 9a, winters are mild — many tender perennials overwinter here.
How long is the growing season in Cibolo?
Cibolo has about 287 frost-free days — a long growing season — between the average last spring frost (February 21) and first fall frost (December 5).
When should I plant tomatoes in Cibolo?
For Cibolo, sow tomatoes indoors about December 27–January 10 and move the seedlings out around February 28, after the last spring frost.
Never miss a window in Cibolo
An email when it’s time to start seeds, transplant, and sow — timed to Cibolo’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Schertz · 3 km
- Universal City · 9 km
- Selma · 10 km
- Converse · 10 km
- Live Oak · 12 km
- New Braunfels · 18 km
- Seguin · 24 km
- Timberwood Park · 30 km
Frost dates recorded at RANDOLPH AFB, 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 Cibolo, TX — Frost Dates & Zone 9a." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USW00012911. Retrieved from https://blissgarden.com/texas/cibolo.