When to plant in Port Lavaca, TX
USDA Zone 9bPort Lavaca, 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 ~323-day season lets Port Lavaca gardeners direct-sow more and still ripen long-maturity crops like melons and winter squash. Zone 9b is warm enough that Port Lavaca can grow subtropical perennials, and the short (or absent) frost period barely limits the annual calendar.
The average last spring frost in Port Lavaca is now 7 days earlier than in the 1981–2010 normals. See how frost dates are shifting nationwide →
Frost probability
PT COMFORT · 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 Port Lavaca’s own odds, recorded at PT COMFORT.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | Mar 18 | Feb 22 | Jan 25 | Nov 10 | Dec 3 | Dec 28 |
| 32°F | Mar 4 | Feb 1 | Dec 24 | Nov 25 | Dec 21 | Jan 18 |
| 28°F | Feb 23 | Jan 21 | Dec 17 | Dec 8 | Jan 1 | Feb 6 |
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 Port Lavaca, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 33 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.
Port Lavaca planting FAQ
When is the last spring frost in Port Lavaca, TX?
Plan for the last spring frost in Port Lavaca around February 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 Port Lavaca, TX?
The first fall frost in Port Lavaca typically arrives around December 21 (50% probability at 32°F). Harvest or protect frost-sensitive crops before then.
What hardiness zone is Port Lavaca in?
Port Lavaca is in USDA hardiness zone 9b. In zone 9b, winters are mild — many tender perennials overwinter here.
How long is the growing season in Port Lavaca?
There are roughly 323 frost-free days in Port Lavaca (a long growing season), running from the average last frost around February 1 to the first fall frost near December 21.
When should I plant tomatoes in Port Lavaca?
In Port Lavaca, start tomato seeds indoors around December 7–December 21, then transplant seedlings outdoors around February 8 once the danger of frost has passed.
Never miss a window in Port Lavaca
An email when it’s time to start seeds, transplant, and sow — timed to Port Lavaca’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Victoria · 42 km
- El Campo · 73 km
- Rockport · 76 km
- Bay City · 77 km
- Portland · 106 km
- Corpus Christi · 110 km
- Beeville · 112 km
- Lake Jackson · 124 km
Frost dates recorded at PT COMFORT, 8 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 Port Lavaca, TX — Frost Dates & Zone 9b." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00417140. Retrieved from https://blissgarden.com/texas/port-lavaca.