When to plant in Brenham, TX
USDA Zone 9aEverything below — frost dates, hardiness zone, and what to plant when in Brenham, Texas — is derived from the closest NOAA station with complete climate normals.
Brenham enjoys a long ~273-day frost-free season — you can succession-sow, fit in a second crop, and grow long-season heat-lovers with room to spare. Zone 9a is warm enough that Brenham can grow subtropical perennials, and the short (or absent) frost period barely limits the annual calendar.
Frost probability
BRENHAM · 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 Brenham’s own odds, recorded at BRENHAM.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | Apr 1 | Mar 13 | Feb 23 | Nov 1 | Nov 17 | Dec 5 |
| 32°F | Mar 20 | Mar 2 | Jan 31 | Nov 8 | Nov 30 | Dec 23 |
| 28°F | Mar 11 | Feb 10 | Jan 6 | Nov 18 | Dec 18 | Jan 19 |
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 Brenham, 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.
Brenham planting FAQ
When is the last spring frost in Brenham, TX?
Brenham's average last spring frost falls near March 2 — 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 Brenham, TX?
Expect Brenham's first fall frost near November 30 — a 50% chance of 32°F by that date. Bring in or cover tender crops ahead of it.
What hardiness zone is Brenham in?
Brenham is in USDA hardiness zone 9a. In zone 9a, winters are mild — many tender perennials overwinter here.
How long is the growing season in Brenham?
There are roughly 273 frost-free days in Brenham (a long growing season), running from the average last frost around March 2 to the first fall frost near November 30.
When should I plant tomatoes in Brenham?
In Brenham, start tomato seeds indoors around January 5–January 19, then transplant seedlings outdoors around March 9 once the danger of frost has passed.
Never miss a window in Brenham
An email when it’s time to start seeds, transplant, and sow — timed to Brenham’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- College Station · 48 km
- Bryan · 56 km
- Katy · 67 km
- Fulshear · 71 km
- Tomball · 75 km
- Cinco Ranch · 77 km
- The Woodlands · 85 km
- Mission Bend · 87 km
Frost dates recorded at BRENHAM, 0 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 Brenham, TX — Frost Dates & Zone 9a." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00411048. Retrieved from https://blissgarden.com/texas/brenham.