When to plant in Baytown, TX
USDA Zone 9bHere are the average frost dates, USDA hardiness zone, and a month-by-month planting calendar for Baytown, Texas — all computed from Baytown's nearest NOAA weather station.
With about 287 frost-free days, Baytown supports back-to-back plantings; stagger sowings every few weeks to keep beds productive spring through fall. Heads up: the nearest complete-normals station is about 17 km from Baytown, so your yard's frost dates can differ — a low spot or a paved city center can shift them by a week. Zone 9b is warm enough that Baytown can grow subtropical perennials, and the short (or absent) frost period barely limits the annual calendar.
The average last spring frost in Baytown is now 11 days later than in the 1981–2010 normals. See how frost dates are shifting nationwide →
Frost probability
BAYTOWN · 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 Baytown’s own odds, recorded at BAYTOWN.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | Mar 28 | Mar 6 | Feb 13 | Nov 2 | Nov 20 | Dec 10 |
| 32°F | Mar 14 | Feb 20 | Jan 23 | Nov 12 | Dec 4 | Jan 4 |
| 28°F | Mar 1 | Jan 30 | Dec 25 | Nov 25 | Dec 28 | Jan 29 |
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 Baytown, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 32 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.
Baytown planting FAQ
When is the last spring frost in Baytown, TX?
Baytown's average last spring frost falls near February 20 — 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 Baytown, TX?
The first fall frost in Baytown typically arrives around December 4 (50% probability at 32°F). Harvest or protect frost-sensitive crops before then.
What hardiness zone is Baytown in?
Baytown is in USDA hardiness zone 9b. In zone 9b, winters are mild — many tender perennials overwinter here.
How long is the growing season in Baytown?
There are roughly 287 frost-free days in Baytown (a long growing season), running from the average last frost around February 20 to the first fall frost near December 4.
When should I plant tomatoes in Baytown?
In Baytown, start tomato seeds indoors around December 26–January 9, then transplant seedlings outdoors around February 27 once the danger of frost has passed.
Never miss a window in Baytown
An email when it’s time to start seeds, transplant, and sow — timed to Baytown’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- La Porte · 13 km
- Channelview · 15 km
- Deer Park · 17 km
- Seabrook · 19 km
- Cloverleaf · 20 km
- Pasadena · 22 km
- Galena Park · 26 km
- South Houston · 28 km
Frost dates recorded at BAYTOWN, 17 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 Baytown, TX — Frost Dates & Zone 9b." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00410586. Retrieved from https://blissgarden.com/texas/baytown.