Wallsburg, UT frost dates
Last spring frostMay 28median date
First fall frostSep 23median date
Growing season118 daysfrost-free
Hardiness zone6aZone 6a
How Wallsburg compares
- In 8 years out of 10, the last spring frost in Wallsburg falls between May 11 and June 15, a 35-day window. The first fall frost falls between September 7 and October 5.
- The median last frost is 18 days later than the Utah median of May 10.
- Its 118-day growing season is longer than 17% of the 250 Utah places with a regular frost season (state median 148 days).
- The last frost is 29 days later than the zone 6a median of Apr 29. Hardiness zones measure winter cold, not season length, so use these dates rather than a zone 6a chart.
- The weather station records an average of 198 nights a year at or below 32°F.
- Compared with Orem, UT, 20 km away, the last frost here is 40 days later than there and the growing season is 68 days shorter.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | May 11 |
| 50% (median) | May 28 |
| 10% (safe for tender plants) | June 15 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | September 7 |
| 50% (median) | September 23 |
| 90% (late) | October 5 |
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 Wallsburg, UT
Wallsburg, UT frost dates — last frost May 28, first frost Sep 23, zone 6a. whenisthelastfrost.com
Crop
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Start indoors: Mar 5 to Mar 19Transplant outside: Apr 30 to May 14
Start indoors: Mar 19 to Apr 2Transplant outside: Jun 11 to Jun 25
Start indoors: Mar 19 to Apr 2Transplant outside: Jun 11 to Jun 25
Start indoors: Apr 2 to Apr 16Transplant outside: Jun 4 to Jun 18
Start indoors: Apr 2 to Apr 16Transplant outside: May 7 to May 21Sow outdoors: Apr 30 to Jun 4Plant for fall: Jul 29 to Aug 26
Start indoors: Apr 2 to Apr 16Transplant outside: Apr 30 to May 14Sow outdoors: Apr 30 to May 14Plant for fall: Jul 15 to Aug 5
Start indoors: Apr 2 to Apr 16Transplant outside: May 14 to May 28Plant for fall: Jun 17 to Jul 8
Start indoors: Apr 2 to Apr 16Transplant outside: May 7 to May 21Plant for fall: Jun 17 to Jul 8
Start indoors: Apr 2 to Apr 16Transplant outside: May 14 to May 28Plant for fall: Jun 17 to Jul 8
Start indoors: Apr 16 to Apr 30Transplant outside: Jun 18 to Jul 2Sow outdoors: Jun 18 to Jul 2
Start indoors: Apr 16 to Apr 30Transplant outside: Jun 4 to Jun 18
Sow outdoors: Apr 16 to May 7Plant for fall: Jul 1 to Jul 22
Sow outdoors: Apr 16 to May 7Plant for fall: Jul 29 to Aug 19
Sow outdoors: Apr 23 to Jun 4Plant for fall: Aug 12 to Sep 2
Start indoors: Apr 30 to May 7Transplant outside: Jun 11 to Jun 18Sow outdoors: Jun 4 to Jun 18Plant for fall: Jul 8 to Jul 22
Start indoors: Apr 30 to May 7Sow outdoors: Jun 4 to Jun 18Plant for fall: Jul 15 to Jul 29
Start indoors: Apr 30 to May 7Sow outdoors: Jun 4 to Jun 18
Start indoors: Apr 30 to May 7Transplant outside: Jun 11 to Jun 25
Sow outdoors: May 7 to Jun 4Plant for fall: Jul 1 to Jul 15
Sow outdoors: May 7 to Jun 4Plant for fall: Jul 15 to Jul 29
Sow outdoors: May 7 to May 28
Sow outdoors: May 14 to Jun 11Plant for fall: Jul 15 to Jul 29
Sow outdoors: May 14 to Jun 4Plant for fall: Jul 29 to Aug 19
Sow outdoors: Jun 4 to Jun 25
Sow outdoors: Jun 4 to Jun 18
Transplant outside: Jun 11 to Jul 2
Plant for fall: Sep 9 to Oct 14
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in Wallsburg, UT
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Mar 5 – Mar 19 | Apr 30 – May 14 | — | — |
| Peppers | Mar 19 – Apr 2 | Jun 11 – Jun 25 | — | — |
| Eggplant | Mar 19 – Apr 2 | Jun 11 – Jun 25 | — | — |
| Tomatoes | Apr 2 – Apr 16 | Jun 4 – Jun 18 | — | — |
| Lettuce | Apr 2 – Apr 16 | May 7 – May 21 | Apr 30 – Jun 4 | Jul 29 – Aug 26 |
| Kale | Apr 2 – Apr 16 | Apr 30 – May 14 | Apr 30 – May 14 | Jul 15 – Aug 5 |
| Broccoli | Apr 2 – Apr 16 | May 14 – May 28 | — | Jun 17 – Jul 8 |
| Cabbage | Apr 2 – Apr 16 | May 7 – May 21 | — | Jun 17 – Jul 8 |
| Cauliflower | Apr 2 – Apr 16 | May 14 – May 28 | — | Jun 17 – Jul 8 |
| Okra | Apr 16 – Apr 30 | Jun 18 – Jul 2 | Jun 18 – Jul 2 | — |
| Basil | Apr 16 – Apr 30 | Jun 4 – Jun 18 | — | — |
| Peas | — | — | Apr 16 – May 7 | Jul 1 – Jul 22 |
| Spinach | — | — | Apr 16 – May 7 | Jul 29 – Aug 19 |
| Radishes | — | — | Apr 23 – Jun 4 | Aug 12 – Sep 2 |
| Cucumbers | Apr 30 – May 7 | Jun 11 – Jun 18 | Jun 4 – Jun 18 | Jul 8 – Jul 22 |
| Zucchini & Summer Squash | Apr 30 – May 7 | — | Jun 4 – Jun 18 | Jul 15 – Jul 29 |
| Winter Squash & Pumpkins | Apr 30 – May 7 | — | Jun 4 – Jun 18 | — |
| Melons & Watermelon | Apr 30 – May 7 | Jun 11 – Jun 25 | — | — |
| Carrots | — | — | May 7 – Jun 4 | Jul 1 – Jul 15 |
| Beets | — | — | May 7 – Jun 4 | Jul 15 – Jul 29 |
| Potatoes | — | — | May 7 – May 28 | — |
| Swiss Chard | — | — | May 14 – Jun 11 | Jul 15 – Jul 29 |
| Cilantro | — | — | May 14 – Jun 4 | Jul 29 – Aug 19 |
| Green Beans | — | — | Jun 4 – Jun 25 | — |
| Sweet Corn | — | — | Jun 4 – Jun 18 | — |
| Sweet Potatoes | — | Jun 11 – Jul 2 | — | — |
| Garlic | — | — | — | Sep 9 – Oct 14 |
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 Deer Creek Dam, UT weather station, 7 km away (elevation 5,269 ft (1,606 m)).
Frost dates near Wallsburg
- Heber City Jun 4 · Sep 20
- Midway May 31 · Sep 11
- Orem Apr 18 · Oct 21
- Provo Apr 18 · Oct 21
- Lindon Apr 17 · Oct 25
- Pleasant Grove Apr 17 · Oct 25
- Springville Apr 25 · Oct 18
- Mapleton Apr 25 · Oct 18
- Alpine May 3 · Oct 12
- American Fork Apr 17 · Oct 25
Frequently asked questions
When is the last frost in Wallsburg, UT?
The median last spring frost in Wallsburg, UT is May 28. There is still about a 10% chance of frost after June 15, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Wallsburg, UT?
The median first fall frost is September 23, with about a 10% chance of frost before September 7.
How long is the growing season in Wallsburg, UT?
About 118 days between the median last spring frost and first fall frost.
What planting zone is Wallsburg, UT?
Wallsburg, UT is in USDA hardiness zone 6a.