Frost dates for 78682 — Round Rock, TX
Last spring frostMar 6median date
First fall frostNov 24median date
Growing season263 daysfrost-free
Hardiness zone9aZone 9a
How Round Rock compares
- In 8 years out of 10, the last spring frost in Round Rock falls between February 13 and March 30, a 45-day window. The first fall frost falls between November 5 and December 10.
- The median last frost is 9 days earlier than the Texas median of Mar 15.
- Its 263-day growing season is longer than 76% of the 1,316 Texas places with a regular frost season (state median 245 days).
- The last frost is typical for zone 9a, where the median is Mar 3.
- The weather station records an average of 28 nights a year at or below 32°F.
- Compared with Austin, TX, 42 km away, the last frost here is 14 days later than there and the growing season is 23 days shorter.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | February 13 |
| 50% (median) | March 6 |
| 10% (safe for tender plants) | March 30 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | November 5 |
| 50% (median) | November 24 |
| 90% (late) | December 10 |
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 Rock, TX
Frost dates for 78682 — Round Rock, TX — last frost Mar 6, first frost Nov 24, zone 9a. whenisthelastfrost.com
Crop
JFMAMJJASOND
Start indoors: Dec 12 to Dec 26Transplant outside: Feb 6 to Feb 20
Start indoors: Dec 26 to Jan 9Start indoors: Dec 26 to Jan 9Transplant outside: Mar 20 to Apr 3
Start indoors: Dec 26 to Jan 9Start indoors: Dec 26 to Jan 9Transplant outside: Mar 20 to Apr 3
Start indoors: Jan 9 to Jan 23Transplant outside: Mar 13 to Mar 27
Start indoors: Jan 9 to Jan 23Transplant outside: Feb 13 to Feb 27Sow outdoors: Feb 6 to Mar 13Plant for fall: Sep 29 to Oct 27
Start indoors: Jan 9 to Jan 23Transplant outside: Feb 6 to Feb 20Sow outdoors: Feb 6 to Feb 20Plant for fall: Sep 15 to Oct 6
Start indoors: Jan 9 to Jan 23Transplant outside: Feb 20 to Mar 6Plant for fall: Aug 18 to Sep 8
Start indoors: Jan 9 to Jan 23Transplant outside: Feb 13 to Feb 27Plant for fall: Aug 18 to Sep 8
Start indoors: Jan 9 to Jan 23Transplant outside: Feb 20 to Mar 6Plant for fall: Aug 18 to Sep 8
Start indoors: Jan 23 to Feb 6Transplant outside: Mar 27 to Apr 10Sow outdoors: Mar 27 to Apr 10
Start indoors: Jan 23 to Feb 6Transplant outside: Mar 13 to Mar 27
Sow outdoors: Jan 23 to Feb 13Plant for fall: Sep 1 to Sep 22
Sow outdoors: Jan 23 to Feb 13Plant for fall: Sep 29 to Oct 20
Sow outdoors: Jan 30 to Mar 13Plant for fall: Oct 13 to Nov 3
Start indoors: Feb 6 to Feb 13Transplant outside: Mar 20 to Mar 27Sow outdoors: Mar 13 to Mar 27Plant for fall: Sep 8 to Sep 22
Start indoors: Feb 6 to Feb 13Sow outdoors: Mar 13 to Mar 27Plant for fall: Sep 15 to Sep 29
Start indoors: Feb 6 to Feb 13Sow outdoors: Mar 13 to Mar 27
Start indoors: Feb 6 to Feb 13Transplant outside: Mar 20 to Apr 3
Sow outdoors: Feb 13 to Mar 13Plant for fall: Sep 1 to Sep 15
Sow outdoors: Feb 13 to Mar 13Plant for fall: Sep 15 to Sep 29
Sow outdoors: Feb 13 to Mar 6
Sow outdoors: Feb 20 to Mar 20Plant for fall: Sep 15 to Sep 29
Sow outdoors: Feb 20 to Mar 13Plant for fall: Sep 29 to Oct 20
Sow outdoors: Mar 13 to Apr 3Plant for fall: Sep 8 to Sep 22
Sow outdoors: Mar 13 to Mar 27
Transplant outside: Mar 20 to Apr 10
Plant for fall: Nov 10 to Dec 15
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in Round Rock, TX
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Dec 12 – Dec 26 | Feb 6 – Feb 20 | — | — |
| Peppers | Dec 26 – Jan 9 | Mar 20 – Apr 3 | — | — |
| Eggplant | Dec 26 – Jan 9 | Mar 20 – Apr 3 | — | — |
| Tomatoes | Jan 9 – Jan 23 | Mar 13 – Mar 27 | — | — |
| Lettuce | Jan 9 – Jan 23 | Feb 13 – Feb 27 | Feb 6 – Mar 13 | Sep 29 – Oct 27 |
| Kale | Jan 9 – Jan 23 | Feb 6 – Feb 20 | Feb 6 – Feb 20 | Sep 15 – Oct 6 |
| Broccoli | Jan 9 – Jan 23 | Feb 20 – Mar 6 | — | Aug 18 – Sep 8 |
| Cabbage | Jan 9 – Jan 23 | Feb 13 – Feb 27 | — | Aug 18 – Sep 8 |
| Cauliflower | Jan 9 – Jan 23 | Feb 20 – Mar 6 | — | Aug 18 – Sep 8 |
| Okra | Jan 23 – Feb 6 | Mar 27 – Apr 10 | Mar 27 – Apr 10 | — |
| Basil | Jan 23 – Feb 6 | Mar 13 – Mar 27 | — | — |
| Peas | — | — | Jan 23 – Feb 13 | Sep 1 – Sep 22 |
| Spinach | — | — | Jan 23 – Feb 13 | Sep 29 – Oct 20 |
| Radishes | — | — | Jan 30 – Mar 13 | Oct 13 – Nov 3 |
| Cucumbers | Feb 6 – Feb 13 | Mar 20 – Mar 27 | Mar 13 – Mar 27 | Sep 8 – Sep 22 |
| Zucchini & Summer Squash | Feb 6 – Feb 13 | — | Mar 13 – Mar 27 | Sep 15 – Sep 29 |
| Winter Squash & Pumpkins | Feb 6 – Feb 13 | — | Mar 13 – Mar 27 | — |
| Melons & Watermelon | Feb 6 – Feb 13 | Mar 20 – Apr 3 | — | — |
| Carrots | — | — | Feb 13 – Mar 13 | Sep 1 – Sep 15 |
| Beets | — | — | Feb 13 – Mar 13 | Sep 15 – Sep 29 |
| Potatoes | — | — | Feb 13 – Mar 6 | — |
| Swiss Chard | — | — | Feb 20 – Mar 20 | Sep 15 – Sep 29 |
| Cilantro | — | — | Feb 20 – Mar 13 | Sep 29 – Oct 20 |
| Green Beans | — | — | Mar 13 – Apr 3 | Sep 8 – Sep 22 |
| Sweet Corn | — | — | Mar 13 – Mar 27 | — |
| Sweet Potatoes | — | Mar 20 – Apr 10 | — | — |
| Garlic | — | — | — | Nov 10 – Dec 15 |
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 Georgetown Lake, TX weather station, 12 km away (elevation 873 ft (266 m)).
ZIP codes in Round Rock: 78664 78665 78680 78681 78682 78683
Frost dates near Round Rock
- Weir Mar 6 · Nov 24
- Walburg Mar 6 · Nov 24
- Georgetown Mar 6 · Nov 24
- Hutto Mar 8 · Nov 21
- Jarrell Mar 6 · Nov 24
- Granger Mar 5 · Nov 22
- Schwertner Mar 5 · Nov 22
- Taylor Mar 8 · Nov 21
Frequently asked questions
When is the last frost in Round Rock, TX?
The median last spring frost in Round Rock, TX is March 6. There is still about a 10% chance of frost after March 30, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Round Rock, TX?
The median first fall frost is November 24, with about a 10% chance of frost before November 5.
How long is the growing season in Round Rock, TX?
About 263 days between the median last spring frost and first fall frost.
What planting zone is Round Rock, TX?
Round Rock, TX is in USDA hardiness zone 9a.