Alvin, TX planting zone & frost dates
Alvin is in USDA hardiness zone 9b. The last spring frost usually comes around February 14 and the first fall frost around December 5, for a growing season of about 298 days.
Planting calendar for Alvin
Dates are counted from the average last spring frost (February 14) using the typical timing recommended by U.S. extension services. Warm-season crops go out only after the danger of frost has passed and the soil has warmed.
| Crop | When |
|---|---|
| Tomatoes | Start seeds indoors: Dec 20 – Jan 3 Transplant outdoors: Feb 21 – Feb 28 |
| Peppers | Start seeds indoors: Dec 6 – Dec 20 Transplant outdoors: Feb 28 – Mar 7 |
| Eggplant | Start seeds indoors: Dec 6 – Dec 20 Transplant outdoors: Feb 28 – Mar 7 |
| Broccoli | Start seeds indoors: Dec 6 – Dec 20 Transplant outdoors: Jan 17 – Jan 31 |
| Cabbage | Start seeds indoors: Dec 6 – Dec 20 Transplant outdoors: Jan 17 – Jan 31 |
| Onions (sets) | Plant outdoors: Jan 17 – Jan 31 |
| Peas | Sow outdoors: Jan 3 – Jan 17 |
| Spinach | Sow outdoors: Jan 3 – Jan 17 |
| Lettuce | Sow outdoors: Jan 17 – Jan 31 |
| Carrots | Sow outdoors: Jan 17 – Jan 31 |
| Potatoes | Plant outdoors: Jan 17 – Jan 31 |
| Beans | Sow outdoors: Feb 21 – Feb 28 |
| Sweet corn | Sow outdoors: Feb 21 – Feb 28 |
| Cucumbers | Sow outdoors: Feb 21 – Feb 28 |
| Squash & zucchini | Sow outdoors: Feb 21 – Feb 28 |
| Basil | Start seeds indoors: Jan 3 – Jan 17 Transplant outdoors: Feb 21 – Feb 28 |
Fall garden: cool-season crops like lettuce, spinach and kale can be sown again around Oct 10 (8 weeks before the average first fall frost on Dec 5).
Frost risk in detail
| 90% chance | 50% chance | 10% chance | |
|---|---|---|---|
| Last 32°F frost in spring is after | Jan 15 | Feb 14 | Mar 13 |
| First 32°F frost in fall is before | Jan 8 | Dec 5 | Nov 14 |
How to read it: in spring there is a 10% chance of a frost after March 13, so that is a safe date for tender plants. In fall there is a 10% chance of frost before November 14. A hard freeze (28°F) usually ends around January 25.
Hardiness zone by ZIP code in Alvin
- 77511 zone 9b
- 77512 zone 9b
Nearby cities
- Friendswood zone 9b, last frost Jan 31
- Santa Fe zone 9b, last frost Jan 31
- Pearland zone 9b, last frost Jan 31
- Webster zone 9b, last frost Jan 31
- League City zone 9b, last frost Jan 31
- Dickinson zone 9b, last frost Jan 31
- Fresno zone 9b, last frost Feb 15
- South Houston zone 9b, last frost Jan 30
Questions
What growing zone is Alvin, TX?
Alvin is in USDA Plant Hardiness Zone 9b (average extreme winter low 25°F to 30°F), according to the USDA 2023 map.
When is the last frost in Alvin?
The average last spring frost (32°F) in Alvin is February 14. There is still a 10% chance of frost until March 13.
When can I plant tomatoes in Alvin?
Transplant tomatoes outdoors 1–2 weeks after the average last frost: around Feb 21 – Feb 28. Start seeds indoors 6–8 weeks before the last frost.
Frost dates: NOAA U.S. Climate Normals 1991–2020, station Alvin, TX (USC00410204), 6.6 km (4.1 mi) from the city center, elevation 8 m, based on 12 years of records. Hardiness zone: USDA Plant Hardiness Zone Map 2023 for the ZIP code nearest to the city center. Microclimates (valleys, hills, cities, coasts) can be warmer or colder: check the local forecast before planting. How we calculate the data.