When to plant in Robstown, TX
USDA Zone 9bEverything below — frost dates, hardiness zone, and what to plant when in Robstown, Texas — is derived from the closest NOAA station with complete climate normals.
Robstown enjoys a long ~332-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 9b, frost is a minor factor for Robstown — most perennials thrive, and annual vegetables can go out early and stay late.
The average last spring frost in Robstown is now 7 days earlier than in the 1981–2010 normals. See how frost dates are shifting nationwide →
Frost probability
ROBSTOWN · 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 Robstown’s own odds, recorded at ROBSTOWN.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | Mar 12 | Feb 15 | Jan 13 | Nov 16 | Dec 8 | Jan 7 |
| 32°F | Mar 3 | Jan 26 | Dec 18 | Nov 28 | Dec 24 | Feb 2 |
| 28°F | Feb 15 | Jan 10 | Dec 10 | Dec 7 | Jan 2 | 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 Robstown, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 16 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.
Robstown planting FAQ
When is the last spring frost in Robstown, TX?
Plan for the last spring frost in Robstown around January 26 (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 Robstown, TX?
The first fall frost in Robstown typically arrives around December 24 (50% probability at 32°F). Harvest or protect frost-sensitive crops before then.
What hardiness zone is Robstown in?
Robstown is in USDA hardiness zone 9b. In zone 9b, winters are mild — many tender perennials overwinter here.
How long is the growing season in Robstown?
Robstown has about 332 frost-free days — a long growing season — between the average last spring frost (January 26) and first fall frost (December 24).
When should I plant tomatoes in Robstown?
For Robstown, sow tomatoes indoors about December 1–December 15 and move the seedlings out around February 2, after the last spring frost.
Never miss a window in Robstown
An email when it’s time to start seeds, transplant, and sow — timed to Robstown’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Portland · 35 km
- Kingsville · 37 km
- Alice · 39 km
- Corpus Christi · 49 km
- Rockport · 67 km
- Beeville · 68 km
- Victoria · 133 km
- Port Lavaca · 137 km
Frost dates recorded at ROBSTOWN, 1 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 Robstown, TX — Frost Dates & Zone 9b." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00417677. Retrieved from https://blissgarden.com/texas/robstown.