Japanese Katsura Trees
Our Katsura trees really get yellow to brown during the end of summer (end of August, beginning of September). It's this a variant of normal or is there a problem which needs to be addressed? If so, would greatly appreciate advisement.
Washington County Oregon trees and shrubs
Early color of trees such as your Katsura, (Cercidiphyllum japonicum) is likely due to stress. Our recent hot dry summers are causing some tree decline due to drought stress. This page on katsura from Oregon State University Landscape Plants indicates supplemental summer water is recommended for your trees. https://landscapeplants.oregonstate.edu/plants/cercidiphyllum-japonicum Occasional deep watering is best for trees, rather than the shallow regular watering lawns require. Water now, and next summer begin when spring rains stop. “One option is to water at least six hours every two to four weeks August through September.” This advice is about conifers in this article, and gives an idea of what may help your trees. https://today.oregonstate.edu/news/western-oregon-conifers-continue-show-damage-due-drought