Round Mountain, TX frost dates
Last spring frostMar 22median date
First fall frostNov 9median date
Growing season232 daysfrost-free
Hardiness zone8bZone 8b
How Round Mountain compares
- In 8 years out of 10, the last spring frost in Round Mountain falls between February 27 and April 11, a 43-day window. The first fall frost falls between October 25 and November 30.
- The median last frost is 7 days later than the Texas median of Mar 15.
- Its 232-day growing season is longer than 27% of the 1,316 Texas places with a regular frost season (state median 245 days).
- The last frost is 6 days later than the zone 8b median of Mar 16. Hardiness zones measure winter cold, not season length, so use these dates rather than a zone 8b chart.
- The weather station records an average of 42 nights a year at or below 32°F.
- Compared with Leander, TX, 53 km away, the last frost here is 11 days later than there and the growing season is 22 days shorter.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | February 27 |
| 50% (median) | March 22 |
| 10% (safe for tender plants) | April 11 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | October 25 |
| 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 Round Mountain, TX
Round Mountain, TX frost dates — last frost Mar 22, first frost Nov 9, zone 8b. whenisthelastfrost.com
Crop
JFMAMJJASOND
Start indoors: Dec 28 to Jan 11Start indoors: Dec 28 to Jan 11Transplant outside: Feb 22 to Mar 8
Start indoors: Jan 11 to Jan 25Transplant outside: Apr 5 to Apr 19
Start indoors: Jan 11 to Jan 25Transplant outside: Apr 5 to Apr 19
Start indoors: Jan 25 to Feb 8Transplant outside: Mar 29 to Apr 12
Start indoors: Jan 25 to Feb 8Transplant outside: Mar 1 to Mar 15Sow outdoors: Feb 22 to Mar 29Plant for fall: Sep 14 to Oct 12
Start indoors: Jan 25 to Feb 8Transplant outside: Feb 22 to Mar 8Sow outdoors: Feb 22 to Mar 8Plant for fall: Aug 31 to Sep 21
Start indoors: Jan 25 to Feb 8Transplant outside: Mar 8 to Mar 22Plant for fall: Aug 3 to Aug 24
Start indoors: Jan 25 to Feb 8Transplant outside: Mar 1 to Mar 15Plant for fall: Aug 3 to Aug 24
Start indoors: Jan 25 to Feb 8Transplant outside: Mar 8 to Mar 22Plant for fall: Aug 3 to Aug 24
Start indoors: Feb 8 to Feb 22Transplant outside: Apr 12 to Apr 26Sow outdoors: Apr 12 to Apr 26
Start indoors: Feb 8 to Feb 22Transplant outside: Mar 29 to Apr 12
Sow outdoors: Feb 8 to Mar 1Plant for fall: Aug 17 to Sep 7
Sow outdoors: Feb 8 to Mar 1Plant for fall: Sep 14 to Oct 5
Sow outdoors: Feb 15 to Mar 29Plant for fall: Sep 28 to Oct 19
Start indoors: Feb 22 to Mar 1Transplant outside: Apr 5 to Apr 12Sow outdoors: Mar 29 to Apr 12Plant for fall: Aug 24 to Sep 7
Start indoors: Feb 22 to Mar 1Sow outdoors: Mar 29 to Apr 12Plant for fall: Aug 31 to Sep 14
Start indoors: Feb 22 to Mar 1Sow outdoors: Mar 29 to Apr 12
Start indoors: Feb 22 to Mar 1Transplant outside: Apr 5 to Apr 19
Sow outdoors: Mar 1 to Mar 29Plant for fall: Aug 17 to Aug 31
Sow outdoors: Mar 1 to Mar 29Plant for fall: Aug 31 to Sep 14
Sow outdoors: Mar 1 to Mar 22
Sow outdoors: Mar 8 to Apr 5Plant for fall: Aug 31 to Sep 14
Sow outdoors: Mar 8 to Mar 29Plant for fall: Sep 14 to Oct 5
Sow outdoors: Mar 29 to Apr 19Plant for fall: Aug 24 to Sep 7
Sow outdoors: Mar 29 to Apr 12
Transplant outside: Apr 5 to Apr 26
Plant for fall: Oct 26 to Nov 30
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in Round Mountain, TX
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Dec 28 – Jan 11 | Feb 22 – Mar 8 | — | — |
| Peppers | Jan 11 – Jan 25 | Apr 5 – Apr 19 | — | — |
| Eggplant | Jan 11 – Jan 25 | Apr 5 – Apr 19 | — | — |
| Tomatoes | Jan 25 – Feb 8 | Mar 29 – Apr 12 | — | — |
| Lettuce | Jan 25 – Feb 8 | Mar 1 – Mar 15 | Feb 22 – Mar 29 | Sep 14 – Oct 12 |
| Kale | Jan 25 – Feb 8 | Feb 22 – Mar 8 | Feb 22 – Mar 8 | Aug 31 – Sep 21 |
| Broccoli | Jan 25 – Feb 8 | Mar 8 – Mar 22 | — | Aug 3 – Aug 24 |
| Cabbage | Jan 25 – Feb 8 | Mar 1 – Mar 15 | — | Aug 3 – Aug 24 |
| Cauliflower | Jan 25 – Feb 8 | Mar 8 – Mar 22 | — | Aug 3 – Aug 24 |
| Okra | Feb 8 – Feb 22 | Apr 12 – Apr 26 | Apr 12 – Apr 26 | — |
| Basil | Feb 8 – Feb 22 | Mar 29 – Apr 12 | — | — |
| Peas | — | — | Feb 8 – Mar 1 | Aug 17 – Sep 7 |
| Spinach | — | — | Feb 8 – Mar 1 | Sep 14 – Oct 5 |
| Radishes | — | — | Feb 15 – Mar 29 | Sep 28 – Oct 19 |
| Cucumbers | Feb 22 – Mar 1 | Apr 5 – Apr 12 | Mar 29 – Apr 12 | Aug 24 – Sep 7 |
| Zucchini & Summer Squash | Feb 22 – Mar 1 | — | Mar 29 – Apr 12 | Aug 31 – Sep 14 |
| Winter Squash & Pumpkins | Feb 22 – Mar 1 | — | Mar 29 – Apr 12 | — |
| Melons & Watermelon | Feb 22 – Mar 1 | Apr 5 – Apr 19 | — | — |
| Carrots | — | — | Mar 1 – Mar 29 | Aug 17 – Aug 31 |
| Beets | — | — | Mar 1 – Mar 29 | Aug 31 – Sep 14 |
| Potatoes | — | — | Mar 1 – Mar 22 | — |
| Swiss Chard | — | — | Mar 8 – Apr 5 | Aug 31 – Sep 14 |
| Cilantro | — | — | Mar 8 – Mar 29 | Sep 14 – Oct 5 |
| Green Beans | — | — | Mar 29 – Apr 19 | Aug 24 – Sep 7 |
| Sweet Corn | — | — | Mar 29 – Apr 12 | — |
| Sweet Potatoes | — | Apr 5 – Apr 26 | — | — |
| 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 Johnson City 2n, TX weather station, 16 km away (elevation 1,138 ft (347 m)).
Frost dates near Round Mountain
- Horseshoe Bay Mar 6 · Nov 23
- Johnson City Mar 22 · Nov 9
- Marble Falls Mar 6 · Nov 23
- Willow City Mar 22 · Nov 9
- Kingsland Mar 20 · Nov 10
- Hye Mar 22 · Nov 9
- Stonewall Mar 22 · Nov 9
- Llano Mar 20 · Nov 10
- Buchanan Dam Mar 6 · Nov 23
- Spicewood Mar 17 · Nov 13
Frequently asked questions
When is the last frost in Round Mountain, TX?
The median last spring frost in Round Mountain, TX is March 22. There is still about a 10% chance of frost after April 11, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Round Mountain, TX?
The median first fall frost is November 9, with about a 10% chance of frost before October 25.
How long is the growing season in Round Mountain, TX?
About 232 days between the median last spring frost and first fall frost.
What planting zone is Round Mountain, TX?
Round Mountain, TX is in USDA hardiness zone 8b.