Frost dates for Leon Valley, TX
When the last spring frost and first fall frost usually come, and when to plant, from 30 years of NOAA weather records.
Last spring frost
February 18
typical year
Safe to plant
March 16
frost is over in 9 of 10 years
First fall frost
December 9
typical year
Growing season
296 days
frost-free, typical year
Frost watch this week
Tonight's and the next six nights' lows from the National Weather Service forecast for the station's location. Frost: 32°F or colder. Possible frost: 33–36°F, mostly in low spots on clear, still nights.
When to plant
Counted from this page's frost dates. Warm-season crops wait for the safe-to-plant date.
| Crop | Start indoors | Plant outside | Fall planting |
|---|---|---|---|
| Cool-season crops | |||
| Peas | – | Jan 21 – Feb 4 | – |
| Spinach | – | Jan 7 – 28 | Oct 14 – 28 |
| Lettuce | – | Jan 21 – Feb 11 | Oct 14 – 28 |
| Radishes | – | Jan 21 – Mar 4 | Oct 28 – Nov 11 |
| Onions | – | Jan 21 – Feb 4 | – |
| Potatoes | – | Jan 28 – Feb 11 | – |
| Carrots | – | Jan 28 – Feb 18 | Sep 16 – 30 |
| Beets | – | Jan 21 – Feb 4 | Sep 30 – Oct 14 |
| Kale | Dec 10 – 24 | Jan 21 – Feb 4 | Sep 30 – Oct 14 |
| Broccoli | Dec 10 – 24 | Feb 4 – 18 | Sep 30 – Oct 14 |
| Cabbage | Nov 26 – Dec 10 | Jan 21 – Feb 4 | Sep 30 – Oct 14 |
| Garlic | – | – | Oct 28 – Nov 18 |
| Warm-season crops | |||
| Tomatoes | Jan 19 – Feb 2 | Mar 16 – 30 | – |
| Peppers | Jan 12 – 26 | Mar 23 – Apr 6 | – |
| Cucumbers | – | Mar 16 – Apr 6 | – |
| Zucchini | – | Mar 16 – Apr 13 | – |
| Pumpkins | – | Mar 16 – Apr 6 | – |
| Green beans | – | Mar 16 – Sep 30 | – |
| Sweet corn | – | Mar 16 – Apr 13 | – |
| Basil | Feb 9 – 23 | Mar 23 – 30 | – |
Onions: from sets. Green beans: until 10 weeks before the first fall frost. Garlic: harvest next summer.
The year at a glance
Start indoors Plant outside Fall planting
The chance of frost, by date
| 1 year in 10 | Half of years | 9 years in 10 | |
|---|---|---|---|
| Spring frost after | March 16 | February 18 | January 18 |
| Fall frost before | November 17 | December 9 | January 13 |
Frost here means 32°F or colder. Read across: in 1 year in 10, spring frost carries on past the first date, which is why that date is the safe-to-plant date.
Hard freeze (28°F)
A hard freeze kills most garden plants, even hardy ones. The last one in spring usually comes around January 31 (March 3 in a late year), and the first one in fall around December 29.
Towns that use these dates
This is the nearest NOAA station with frost records for 3 towns.
Leon Valley, Helotes, Grey Forest
Where these dates come from
NOAA weather station SAN ANTONIO/SEAWORLD, TX US (USC00418169), 1991–2020 climate normals. It's the nearest station for 9 zip codes, all within 16 miles:
78023, 78056, 78066, 78238, 78245, 78250, 78251, 78253, 78254
Planting dates follow common university extension advice; your local extension service can fine-tune them for your soil and microclimate.