When to plant in Alvin, TX
USDA Zone 9bAlvin, Texas frost dates, USDA zone, and a full-year planting calendar, drawn from the nearest NOAA station and tuned to the local season.
Alvin enjoys a long ~294-day frost-free season — you can succession-sow, fit in a second crop, and grow long-season heat-lovers with room to spare. Zone 9b is warm enough that Alvin can grow subtropical perennials, and the short (or absent) frost period barely limits the annual calendar.
The average last spring frost in Alvin is now 6 days earlier than in the 1981–2010 normals. See how frost dates are shifting nationwide →
Frost probability
ALVIN · 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 Alvin’s own odds, recorded at ALVIN.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | Mar 27 | Mar 5 | Feb 4 | Nov 5 | Nov 23 | Dec 15 |
| 32°F | Mar 13 | Feb 14 | Jan 15 | Nov 14 | Dec 5 | Jan 8 |
| 28°F | Mar 2 | Jan 25 | Dec 23 | Nov 27 | Dec 30 | Feb 2 |
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 Alvin, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 15 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.
Alvin planting FAQ
When is the last spring frost in Alvin, TX?
On average, the last spring frost in Alvin is around February 14 (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 Alvin, TX?
The first fall frost in Alvin typically arrives around December 5 (50% probability at 32°F). Harvest or protect frost-sensitive crops before then.
What hardiness zone is Alvin in?
Alvin is in USDA hardiness zone 9b. In zone 9b, winters are mild — many tender perennials overwinter here.
How long is the growing season in Alvin?
There are roughly 294 frost-free days in Alvin (a long growing season), running from the average last frost around February 14 to the first fall frost near December 5.
When should I plant tomatoes in Alvin?
In Alvin, start tomato seeds indoors around December 20–January 3, then transplant seedlings outdoors around February 21 once the danger of frost has passed.
Never miss a window in Alvin
An email when it’s time to start seeds, transplant, and sow — timed to Alvin’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Friendswood · 10 km
- Santa Fe · 13 km
- League City · 13 km
- Manvel · 15 km
- Webster · 16 km
- Dickinson · 17 km
- Pearland · 17 km
- Iowa Colony · 19 km
Frost dates recorded at ALVIN, 7 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 Alvin, TX — Frost Dates & Zone 9b." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00410204. Retrieved from https://blissgarden.com/texas/alvin.