Caldwell, TX frost dates
Last spring frostMar 18median date
First fall frostNov 9median date
Growing season236 daysfrost-free
Hardiness zone9aZone 9a
How Caldwell compares
- In 8 years out of 10, the last spring frost in Caldwell falls between February 25 and April 6, a 40-day window. The first fall frost falls between October 26 and November 30.
- The median last frost is 3 days later than the Texas median of Mar 15.
- Its 236-day growing season is longer than 34% of the 1,316 Texas places with a regular frost season (state median 245 days).
- The last frost is 15 days later 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 37 nights a year at or below 32°F.
- Compared with Bryan, TX, 37 km away, the last frost here is 19 days later than there and the growing season is 40 days shorter.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | February 25 |
| 50% (median) | March 18 |
| 10% (safe for tender plants) | April 6 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | October 26 |
| 50% (median) | November 9 |
| 90% (late) | November 30 |
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 Caldwell, TX
Caldwell, TX frost dates — last frost Mar 18, first frost Nov 9, zone 9a. whenisthelastfrost.com
Crop
JFMAMJJASOND
Start indoors: Dec 24 to Jan 7Start indoors: Dec 24 to Jan 7Transplant outside: Feb 18 to Mar 4
Start indoors: Jan 7 to Jan 21Transplant outside: Apr 1 to Apr 15
Start indoors: Jan 7 to Jan 21Transplant outside: Apr 1 to Apr 15
Start indoors: Jan 21 to Feb 4Transplant outside: Mar 25 to Apr 8
Start indoors: Jan 21 to Feb 4Transplant outside: Feb 25 to Mar 11Sow outdoors: Feb 18 to Mar 25Plant for fall: Sep 14 to Oct 12
Start indoors: Jan 21 to Feb 4Transplant outside: Feb 18 to Mar 4Sow outdoors: Feb 18 to Mar 4Plant for fall: Aug 31 to Sep 21
Start indoors: Jan 21 to Feb 4Transplant outside: Mar 4 to Mar 18Plant for fall: Aug 3 to Aug 24
Start indoors: Jan 21 to Feb 4Transplant outside: Feb 25 to Mar 11Plant for fall: Aug 3 to Aug 24
Start indoors: Jan 21 to Feb 4Transplant outside: Mar 4 to Mar 18Plant for fall: Aug 3 to Aug 24
Start indoors: Feb 4 to Feb 18Transplant outside: Apr 8 to Apr 22Sow outdoors: Apr 8 to Apr 22
Start indoors: Feb 4 to Feb 18Transplant outside: Mar 25 to Apr 8
Sow outdoors: Feb 4 to Feb 25Plant for fall: Aug 17 to Sep 7
Sow outdoors: Feb 4 to Feb 25Plant for fall: Sep 14 to Oct 5
Sow outdoors: Feb 11 to Mar 25Plant for fall: Sep 28 to Oct 19
Start indoors: Feb 18 to Feb 25Transplant outside: Apr 1 to Apr 8Sow outdoors: Mar 25 to Apr 8Plant for fall: Aug 24 to Sep 7
Start indoors: Feb 18 to Feb 25Sow outdoors: Mar 25 to Apr 8Plant for fall: Aug 31 to Sep 14
Start indoors: Feb 18 to Feb 25Sow outdoors: Mar 25 to Apr 8
Start indoors: Feb 18 to Feb 25Transplant outside: Apr 1 to Apr 15
Sow outdoors: Feb 25 to Mar 25Plant for fall: Aug 17 to Aug 31
Sow outdoors: Feb 25 to Mar 25Plant for fall: Aug 31 to Sep 14
Sow outdoors: Feb 25 to Mar 18
Sow outdoors: Mar 4 to Apr 1Plant for fall: Aug 31 to Sep 14
Sow outdoors: Mar 4 to Mar 25Plant for fall: Sep 14 to Oct 5
Sow outdoors: Mar 25 to Apr 15Plant for fall: Aug 24 to Sep 7
Sow outdoors: Mar 25 to Apr 8
Transplant outside: Apr 1 to Apr 22
Plant for fall: Oct 26 to Nov 30
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in Caldwell, TX
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Dec 24 – Jan 7 | Feb 18 – Mar 4 | — | — |
| Peppers | Jan 7 – Jan 21 | Apr 1 – Apr 15 | — | — |
| Eggplant | Jan 7 – Jan 21 | Apr 1 – Apr 15 | — | — |
| Tomatoes | Jan 21 – Feb 4 | Mar 25 – Apr 8 | — | — |
| Lettuce | Jan 21 – Feb 4 | Feb 25 – Mar 11 | Feb 18 – Mar 25 | Sep 14 – Oct 12 |
| Kale | Jan 21 – Feb 4 | Feb 18 – Mar 4 | Feb 18 – Mar 4 | Aug 31 – Sep 21 |
| Broccoli | Jan 21 – Feb 4 | Mar 4 – Mar 18 | — | Aug 3 – Aug 24 |
| Cabbage | Jan 21 – Feb 4 | Feb 25 – Mar 11 | — | Aug 3 – Aug 24 |
| Cauliflower | Jan 21 – Feb 4 | Mar 4 – Mar 18 | — | Aug 3 – Aug 24 |
| Okra | Feb 4 – Feb 18 | Apr 8 – Apr 22 | Apr 8 – Apr 22 | — |
| Basil | Feb 4 – Feb 18 | Mar 25 – Apr 8 | — | — |
| Peas | — | — | Feb 4 – Feb 25 | Aug 17 – Sep 7 |
| Spinach | — | — | Feb 4 – Feb 25 | Sep 14 – Oct 5 |
| Radishes | — | — | Feb 11 – Mar 25 | Sep 28 – Oct 19 |
| Cucumbers | Feb 18 – Feb 25 | Apr 1 – Apr 8 | Mar 25 – Apr 8 | Aug 24 – Sep 7 |
| Zucchini & Summer Squash | Feb 18 – Feb 25 | — | Mar 25 – Apr 8 | Aug 31 – Sep 14 |
| Winter Squash & Pumpkins | Feb 18 – Feb 25 | — | Mar 25 – Apr 8 | — |
| Melons & Watermelon | Feb 18 – Feb 25 | Apr 1 – Apr 15 | — | — |
| Carrots | — | — | Feb 25 – Mar 25 | Aug 17 – Aug 31 |
| Beets | — | — | Feb 25 – Mar 25 | Aug 31 – Sep 14 |
| Potatoes | — | — | Feb 25 – Mar 18 | — |
| Swiss Chard | — | — | Mar 4 – Apr 1 | Aug 31 – Sep 14 |
| Cilantro | — | — | Mar 4 – Mar 25 | Sep 14 – Oct 5 |
| Green Beans | — | — | Mar 25 – Apr 15 | Aug 24 – Sep 7 |
| Sweet Corn | — | — | Mar 25 – Apr 8 | — |
| Sweet Potatoes | — | Apr 1 – Apr 22 | — | — |
| Garlic | — | — | — | Oct 26 – Nov 30 |
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 Somerville Dam, TX weather station, 27 km away (elevation 262 ft (80 m)).
Frost dates near Caldwell
- Chriesman Mar 5 · Nov 21
- Deanville Mar 18 · Nov 9
- Lyons Mar 18 · Nov 9
- Somerville Mar 18 · Nov 9
- Dime Box Mar 5 · Nov 21
- Snook Mar 18 · Nov 9
- Mumford Feb 27 · Nov 30
- Milano Mar 6 · Nov 23
- Gause Mar 6 · Nov 23
- Rockdale Mar 6 · Nov 23
Frequently asked questions
When is the last frost in Caldwell, TX?
The median last spring frost in Caldwell, TX is March 18. There is still about a 10% chance of frost after April 6, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Caldwell, TX?
The median first fall frost is November 9, with about a 10% chance of frost before October 26.
How long is the growing season in Caldwell, TX?
About 236 days between the median last spring frost and first fall frost.
What planting zone is Caldwell, TX?
Caldwell, TX is in USDA hardiness zone 9a.