![]() Other things that can cause leaf abnormalities, including yellowing, scorching and premature leaf drop, have to do with nutrient deficiencies. Oddly, drought stress and over irrigation both show symptoms of dry leaves. If it is already moist, adding more water could kill the tree because the roots rot and the tree can’t take up water. Before doing this, dig down into the soil to evaluate how dry it is. If leaves turn brown, prematurely fall or change color, we often want to water more. For example, even a honeylocust (known for its tolerance to heat) can scorch if planted in a setting surrounded by asphalt or cement. ![]() However, almost any species will show signs of drought stress, based on the severity. Tree species that often exhibit these symptoms of drought stress include many species of maple, cottonwoods, poplars, aspen, ash, stone fruits (peaches and cherries), horse chestnut and linden. However, early color changing can also be due to overwatering. During prolonged periods of drought, trees and shrubs may also prematurely drop leaves, especially from the inner canopy. Over time, this causes many leaves to scorch by late summer.Īnother common reaction to hot, dry conditions is premature color changing. Certain species, especially those with large leaves, lack the ability to handle an entire summer of heat and low humidity. They have been transplanted (like many of us) and struggle to adapt to Utah’s arid climate. Many of the trees grown in our landscapes are not native to the Intermountain West.
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