Utah Frost Alert
- Northern and central Utah suffered a hard frost that left gardeners assessing plant and fruit damage. - Extension sources urge checking for freeze damage before pruning or replacing plants. - Local reports and K‑State guidance recommend careful inspection and delayed pruning to avoid removing stressed tissues ( ).
Gardeners across northern and central Utah are checking blackened leaves, limp stems and damaged blossoms after a hard frost over the weekend. (kslnewsradio.com) Utah State University Extension warned before the April 17 cold snap that fruit trees in bloom or already forming fruitlets could take losses fast: 28 degrees Fahrenheit for 30 minutes can kill about 10% of flowers or fruitlets, and 25 degrees for 30 minutes can kill about 90%. (pestadvisories.usu.edu) The damage is showing up unevenly. KSL reported on April 17 that growers in Cache and Box Elder counties were already seeing heavy losses in cherries, peaches and especially apricots, while hoop-house strawberries and some blueberries looked more likely to survive. (ksl.com) A spring freeze hurts most when warm weather pushes plants out of dormancy early. K-State Extension said rapid swings from record warmth to sudden cold reduce cold tolerance, and new growth and flower buds are the parts most likely to be injured. (extension.k-state.edu) That is why extension advice this week has centered on diagnosis, not cleanup. Matthew McKernan, a horticulture specialist at Kansas State University, said freeze-damaged tissue can look dark green and water-soaked before turning brown or mushy, and buds may fail to open after the cold passes. (extension.k-state.edu) The first check is whether the plant is still alive. McKernan said lightly scratching bark can show living green tissue underneath, and he urged homeowners to wait until plants leaf out before deciding what to prune. (extension.k-state.edu) Utah guidance before the freeze focused on protection for trees that had not yet been hit. Utah State University Extension recommended cloth covers that reach the ground, morning irrigation to help soil hold heat, and avoiding plastic tarps because plant tissue touching plastic can still freeze. (abc4.com) For many Utah growers, the cold followed an unusually early bloom. Farmers told KSL that some fruit trees flowered about a month early after a warm start to spring, leaving a longer window for overnight freezes to wipe out blossoms before harvest. (ksl.com) The next step is mostly waiting. Extension guidance says the full extent of freeze injury can take several weeks to show up, and many plants recover better if stressed tissue is left in place until new growth makes the losses clear. (extension.k-state.edu)
