Saint George, UT frost dates
Last spring frostMar 14median date
First fall frostNov 10median date
Growing season241 daysfrost-free
Hardiness zone8bZone 8b
How Saint George compares
- In 8 years out of 10, the last spring frost in Saint George falls between February 27 and April 6, a 38-day window. The first fall frost falls between October 27 and November 22.
- The median last frost is 57 days earlier than the Utah median of May 10.
- Its 241-day growing season is among the longest of the 250 Utah places with a regular frost season.
- The last frost is typical for zone 8b, where the median is Mar 16.
- The weather station records an average of 63 nights a year at or below 32°F.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | February 27 |
| 50% (median) | March 14 |
| 10% (safe for tender plants) | April 6 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | October 27 |
| 50% (median) | November 10 |
| 90% (late) | November 22 |
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 Saint George, UT
Saint George, UT frost dates — last frost Mar 14, first frost Nov 10, zone 8b. whenisthelastfrost.com
Crop
JFMAMJJASOND
Start indoors: Dec 20 to Jan 3Start indoors: Dec 20 to Jan 3Transplant outside: Feb 14 to Feb 28
Start indoors: Jan 3 to Jan 17Transplant outside: Mar 28 to Apr 11
Start indoors: Jan 3 to Jan 17Transplant outside: Mar 28 to Apr 11
Start indoors: Jan 17 to Jan 31Transplant outside: Mar 21 to Apr 4
Start indoors: Jan 17 to Jan 31Transplant outside: Feb 21 to Mar 7Sow outdoors: Feb 14 to Mar 21Plant for fall: Sep 15 to Oct 13
Start indoors: Jan 17 to Jan 31Transplant outside: Feb 14 to Feb 28Sow outdoors: Feb 14 to Feb 28Plant for fall: Sep 1 to Sep 22
Start indoors: Jan 17 to Jan 31Transplant outside: Feb 28 to Mar 14Plant for fall: Aug 4 to Aug 25
Start indoors: Jan 17 to Jan 31Transplant outside: Feb 21 to Mar 7Plant for fall: Aug 4 to Aug 25
Start indoors: Jan 17 to Jan 31Transplant outside: Feb 28 to Mar 14Plant for fall: Aug 4 to Aug 25
Start indoors: Jan 31 to Feb 14Transplant outside: Apr 4 to Apr 18Sow outdoors: Apr 4 to Apr 18
Start indoors: Jan 31 to Feb 14Transplant outside: Mar 21 to Apr 4
Sow outdoors: Jan 31 to Feb 21Plant for fall: Aug 18 to Sep 8
Sow outdoors: Jan 31 to Feb 21Plant for fall: Sep 15 to Oct 6
Sow outdoors: Feb 7 to Mar 21Plant for fall: Sep 29 to Oct 20
Start indoors: Feb 14 to Feb 21Transplant outside: Mar 28 to Apr 4Sow outdoors: Mar 21 to Apr 4Plant for fall: Aug 25 to Sep 8
Start indoors: Feb 14 to Feb 21Sow outdoors: Mar 21 to Apr 4Plant for fall: Sep 1 to Sep 15
Start indoors: Feb 14 to Feb 21Sow outdoors: Mar 21 to Apr 4
Start indoors: Feb 14 to Feb 21Transplant outside: Mar 28 to Apr 11
Sow outdoors: Feb 21 to Mar 21Plant for fall: Aug 18 to Sep 1
Sow outdoors: Feb 21 to Mar 21Plant for fall: Sep 1 to Sep 15
Sow outdoors: Feb 21 to Mar 14
Sow outdoors: Feb 28 to Mar 28Plant for fall: Sep 1 to Sep 15
Sow outdoors: Feb 28 to Mar 21Plant for fall: Sep 15 to Oct 6
Sow outdoors: Mar 21 to Apr 11Plant for fall: Aug 25 to Sep 8
Sow outdoors: Mar 21 to Apr 4
Transplant outside: Mar 28 to Apr 18
Plant for fall: Oct 27 to Dec 1
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in Saint George, UT
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Dec 20 – Jan 3 | Feb 14 – Feb 28 | — | — |
| Peppers | Jan 3 – Jan 17 | Mar 28 – Apr 11 | — | — |
| Eggplant | Jan 3 – Jan 17 | Mar 28 – Apr 11 | — | — |
| Tomatoes | Jan 17 – Jan 31 | Mar 21 – Apr 4 | — | — |
| Lettuce | Jan 17 – Jan 31 | Feb 21 – Mar 7 | Feb 14 – Mar 21 | Sep 15 – Oct 13 |
| Kale | Jan 17 – Jan 31 | Feb 14 – Feb 28 | Feb 14 – Feb 28 | Sep 1 – Sep 22 |
| Broccoli | Jan 17 – Jan 31 | Feb 28 – Mar 14 | — | Aug 4 – Aug 25 |
| Cabbage | Jan 17 – Jan 31 | Feb 21 – Mar 7 | — | Aug 4 – Aug 25 |
| Cauliflower | Jan 17 – Jan 31 | Feb 28 – Mar 14 | — | Aug 4 – Aug 25 |
| Okra | Jan 31 – Feb 14 | Apr 4 – Apr 18 | Apr 4 – Apr 18 | — |
| Basil | Jan 31 – Feb 14 | Mar 21 – Apr 4 | — | — |
| Peas | — | — | Jan 31 – Feb 21 | Aug 18 – Sep 8 |
| Spinach | — | — | Jan 31 – Feb 21 | Sep 15 – Oct 6 |
| Radishes | — | — | Feb 7 – Mar 21 | Sep 29 – Oct 20 |
| Cucumbers | Feb 14 – Feb 21 | Mar 28 – Apr 4 | Mar 21 – Apr 4 | Aug 25 – Sep 8 |
| Zucchini & Summer Squash | Feb 14 – Feb 21 | — | Mar 21 – Apr 4 | Sep 1 – Sep 15 |
| Winter Squash & Pumpkins | Feb 14 – Feb 21 | — | Mar 21 – Apr 4 | — |
| Melons & Watermelon | Feb 14 – Feb 21 | Mar 28 – Apr 11 | — | — |
| Carrots | — | — | Feb 21 – Mar 21 | Aug 18 – Sep 1 |
| Beets | — | — | Feb 21 – Mar 21 | Sep 1 – Sep 15 |
| Potatoes | — | — | Feb 21 – Mar 14 | — |
| Swiss Chard | — | — | Feb 28 – Mar 28 | Sep 1 – Sep 15 |
| Cilantro | — | — | Feb 28 – Mar 21 | Sep 15 – Oct 6 |
| Green Beans | — | — | Mar 21 – Apr 11 | Aug 25 – Sep 8 |
| Sweet Corn | — | — | Mar 21 – Apr 4 | — |
| Sweet Potatoes | — | Mar 28 – Apr 18 | — | — |
| Garlic | — | — | — | Oct 27 – Dec 1 |
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 St George, UT weather station, 3 km away (elevation 2,858 ft (871 m)).
ZIP codes in Saint George: 84770 84771 84790 84791
Frost dates near Saint George
- Washington Mar 14 · Nov 10
- Santa Clara Mar 14 · Nov 10
- Ivins Mar 14 · Nov 10
- Hurricane Apr 1 · Nov 5
- Dammeron Valley Apr 9 · Nov 5
- Leeds Apr 1 · Nov 5
- Gunlock Apr 9 · Nov 5
- Veyo Apr 9 · Nov 5
- Toquerville Apr 1 · Nov 5
- Pine Valley Apr 9 · Nov 5
Frequently asked questions
When is the last frost in Saint George, UT?
The median last spring frost in Saint George, UT is March 14. 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 Saint George, UT?
The median first fall frost is November 10, with about a 10% chance of frost before October 27.
How long is the growing season in Saint George, UT?
About 241 days between the median last spring frost and first fall frost.
What planting zone is Saint George, UT?
Saint George, UT is in USDA hardiness zone 8b.