![]() Keep the crack clean to prevent infection and leave it open. Sealants, wound paint, and adhesives have no effect on the healing process or the health of the tree. If you’re wondering how to fix a frost crack, the answer is that you don’t. Hardiness zones reflect the lowest expected temperature in an area, but all areas experience unexpectedly low temperatures from time to time, and these low temperatures can damage trees growing on the edges of their hardiness zones. Dark-colored and smooth-barked trees are most susceptible to sunscald.Ĭracking tree trunks also occur in trees grown in areas where they are marginally hardy. You may find strips of bark peeling off the tree. When sunny afternoons are followed by freezing nights, the tissue dies. In late winter or early spring, warm afternoon sun shining on the trunk can cause the tree tissue to break dormancy. You’ll also see cracking tree trunks from a condition called sunscald. Reasons for Frost Crack in Treesįrost is just one of the causes of tree bark cracking. A tree with a crack is in no immediate danger and may live for several years. When the bark alternately contracts with freezing temperatures and expands on warm days, a crack is likely to occur. The term “frost crack” describes vertical cracks in trees caused by alternating freezing and thawing temperatures. Frost cracks usually occur on the south to southwest side of the tree. They can be several feet (1 m.) long and a few inches (8 cm.) wide, and the colder the temperature, the wider the cracks. ![]() During periods of cold winter nights followed by warm sunny days, you may discover frost cracks in trees. ![]()
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