Answer: Yellowing leaves can indicate heat or water stress or might be signs of a disease. Without seeing the leaves, I can't really diagnose the problem. If the leaves do not have a powdery white coating or brown spots, the most likely culprit is hot summer weather. As your dogwood matures it will be able to tolerate summer heat a little better. Continue to water deeply once or twice a week depending upon weather and be sure that you apply enough water to percolate down and wet the entire root mass. You may have to dig down or use a metal probe to make sure the water is moving down into the top 12-18 inches of the soil which is where the roots will be concentrated. Wish I had more suggestions! Good luck with your dogwood!
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