Jbsa Lackland, TX frost dates
Last spring frostFeb 25median date
First fall frostNov 28median date
Growing season276 daysfrost-free
Hardiness zone9aZone 9a
How Jbsa Lackland compares
- In 8 years out of 10, the last spring frost in Jbsa Lackland falls between January 28 and March 19, a 50-day window. The first fall frost falls between November 7 and December 21.
- The median last frost is 18 days earlier than the Texas median of Mar 15.
- Its 276-day growing season is longer than 86% of the 1,316 Texas places with a regular frost season (state median 245 days).
- The last frost is 6 days earlier than the zone 9a median of Mar 3. Hardiness zones measure winter cold, not season length, so use these dates rather than a zone 9a chart.
- The weather station records an average of 22 nights a year at or below 32°F.
- Jbsa Lackland shares its weather station with San Antonio, TX, 5 km away, so the two have the same frost dates.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | January 28 |
| 50% (median) | February 25 |
| 10% (safe for tender plants) | March 19 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | November 7 |
| 50% (median) | November 28 |
| 90% (late) | December 21 |
Frost here means 32°F (0°C). A median date means half of years have their last frost earlier and half later.
Planting calendar for Jbsa Lackland, TX
Jbsa Lackland, TX frost dates — last frost Feb 25, first frost Nov 28, zone 9a. whenisthelastfrost.com
Crop
JFMAMJJASOND
Start indoors: Dec 3 to Dec 17Transplant outside: Jan 28 to Feb 11
Start indoors: Dec 17 to Dec 31Transplant outside: Mar 11 to Mar 25
Start indoors: Dec 17 to Dec 31Transplant outside: Mar 11 to Mar 25
Start indoors: Dec 31 to Jan 14Start indoors: Dec 31 to Jan 14Transplant outside: Mar 4 to Mar 18
Start indoors: Dec 31 to Jan 14Start indoors: Dec 31 to Jan 14Transplant outside: Feb 4 to Feb 18Sow outdoors: Jan 28 to Mar 4Plant for fall: Oct 3 to Oct 31
Start indoors: Dec 31 to Jan 14Start indoors: Dec 31 to Jan 14Transplant outside: Jan 28 to Feb 11Sow outdoors: Jan 28 to Feb 11Plant for fall: Sep 19 to Oct 10
Start indoors: Dec 31 to Jan 14Start indoors: Dec 31 to Jan 14Transplant outside: Feb 11 to Feb 25Plant for fall: Aug 22 to Sep 12
Start indoors: Dec 31 to Jan 14Start indoors: Dec 31 to Jan 14Transplant outside: Feb 4 to Feb 18Plant for fall: Aug 22 to Sep 12
Start indoors: Dec 31 to Jan 14Start indoors: Dec 31 to Jan 14Transplant outside: Feb 11 to Feb 25Plant for fall: Aug 22 to Sep 12
Start indoors: Jan 14 to Jan 28Transplant outside: Mar 18 to Apr 1Sow outdoors: Mar 18 to Apr 1
Start indoors: Jan 14 to Jan 28Transplant outside: Mar 4 to Mar 18
Sow outdoors: Jan 14 to Feb 4Plant for fall: Sep 5 to Sep 26
Sow outdoors: Jan 14 to Feb 4Plant for fall: Oct 3 to Oct 24
Sow outdoors: Jan 21 to Mar 4Plant for fall: Oct 17 to Nov 7
Start indoors: Jan 28 to Feb 4Transplant outside: Mar 11 to Mar 18Sow outdoors: Mar 4 to Mar 18Plant for fall: Sep 12 to Sep 26
Start indoors: Jan 28 to Feb 4Sow outdoors: Mar 4 to Mar 18Plant for fall: Sep 19 to Oct 3
Start indoors: Jan 28 to Feb 4Sow outdoors: Mar 4 to Mar 18
Start indoors: Jan 28 to Feb 4Transplant outside: Mar 11 to Mar 25
Sow outdoors: Feb 4 to Mar 4Plant for fall: Sep 5 to Sep 19
Sow outdoors: Feb 4 to Mar 4Plant for fall: Sep 19 to Oct 3
Sow outdoors: Feb 4 to Feb 25
Sow outdoors: Feb 11 to Mar 11Plant for fall: Sep 19 to Oct 3
Sow outdoors: Feb 11 to Mar 4Plant for fall: Oct 3 to Oct 24
Sow outdoors: Mar 4 to Mar 25Plant for fall: Sep 12 to Sep 26
Sow outdoors: Mar 4 to Mar 18
Transplant outside: Mar 11 to Apr 1
Plant for fall: Nov 14 to Dec 19
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in Jbsa Lackland, TX
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Dec 3 – Dec 17 | Jan 28 – Feb 11 | — | — |
| Peppers | Dec 17 – Dec 31 | Mar 11 – Mar 25 | — | — |
| Eggplant | Dec 17 – Dec 31 | Mar 11 – Mar 25 | — | — |
| Tomatoes | Dec 31 – Jan 14 | Mar 4 – Mar 18 | — | — |
| Lettuce | Dec 31 – Jan 14 | Feb 4 – Feb 18 | Jan 28 – Mar 4 | Oct 3 – Oct 31 |
| Kale | Dec 31 – Jan 14 | Jan 28 – Feb 11 | Jan 28 – Feb 11 | Sep 19 – Oct 10 |
| Broccoli | Dec 31 – Jan 14 | Feb 11 – Feb 25 | — | Aug 22 – Sep 12 |
| Cabbage | Dec 31 – Jan 14 | Feb 4 – Feb 18 | — | Aug 22 – Sep 12 |
| Cauliflower | Dec 31 – Jan 14 | Feb 11 – Feb 25 | — | Aug 22 – Sep 12 |
| Okra | Jan 14 – Jan 28 | Mar 18 – Apr 1 | Mar 18 – Apr 1 | — |
| Basil | Jan 14 – Jan 28 | Mar 4 – Mar 18 | — | — |
| Peas | — | — | Jan 14 – Feb 4 | Sep 5 – Sep 26 |
| Spinach | — | — | Jan 14 – Feb 4 | Oct 3 – Oct 24 |
| Radishes | — | — | Jan 21 – Mar 4 | Oct 17 – Nov 7 |
| Cucumbers | Jan 28 – Feb 4 | Mar 11 – Mar 18 | Mar 4 – Mar 18 | Sep 12 – Sep 26 |
| Zucchini & Summer Squash | Jan 28 – Feb 4 | — | Mar 4 – Mar 18 | Sep 19 – Oct 3 |
| Winter Squash & Pumpkins | Jan 28 – Feb 4 | — | Mar 4 – Mar 18 | — |
| Melons & Watermelon | Jan 28 – Feb 4 | Mar 11 – Mar 25 | — | — |
| Carrots | — | — | Feb 4 – Mar 4 | Sep 5 – Sep 19 |
| Beets | — | — | Feb 4 – Mar 4 | Sep 19 – Oct 3 |
| Potatoes | — | — | Feb 4 – Feb 25 | — |
| Swiss Chard | — | — | Feb 11 – Mar 11 | Sep 19 – Oct 3 |
| Cilantro | — | — | Feb 11 – Mar 4 | Oct 3 – Oct 24 |
| Green Beans | — | — | Mar 4 – Mar 25 | Sep 12 – Sep 26 |
| Sweet Corn | — | — | Mar 4 – Mar 18 | — |
| Sweet Potatoes | — | Mar 11 – Apr 1 | — | — |
| Garlic | — | — | — | Nov 14 – Dec 19 |
Dates come from the median frost dates and common extension-service timing. Adjust for your soil temperature, microclimate and the varieties you grow.
About these dates
Based on 1991–2020 NOAA climate normals for the San Antonio Incarnate Word, TX weather station, 6 km away (elevation 699 ft (213 m)).
Frost dates near Jbsa Lackland
- Jbsa Ft Sam Houston Feb 25 · Nov 28
- San Antonio Feb 25 · Nov 28
- Converse Feb 21 · Dec 5
- Macdona Feb 22 · Dec 2
- Adkins Feb 21 · Dec 5
- Universal City Feb 21 · Dec 5
- Von Ormy Feb 22 · Dec 2
- Elmendorf Feb 20 · Dec 3
- Schertz Feb 21 · Dec 5
- Somerset Feb 24 · Dec 2
Frequently asked questions
When is the last frost in Jbsa Lackland, TX?
The median last spring frost in Jbsa Lackland, TX is February 25. There is still about a 10% chance of frost after March 19, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Jbsa Lackland, TX?
The median first fall frost is November 28, with about a 10% chance of frost before November 7.
How long is the growing season in Jbsa Lackland, TX?
About 276 days between the median last spring frost and first fall frost.
What planting zone is Jbsa Lackland, TX?
Jbsa Lackland, TX is in USDA hardiness zone 9a.