A flowering cherry tree is a great addition to any garden or landscape. Sometimes it can be confusing to understand how to properly water cherry trees, along with other types of fruit trees, and you can end up overwatering them. This basically means you are watering the tree to frequently so the soil cannot dry out in between. This is bad for the plant because, just like everything else, plants need to have oxygen circulate, from the leaves to the roots. If it doesn't have that, it will die. There are some key signs to look for in your cherry tree to see if you are possibly overwatering it.
Root rot is a common ailment of cherry trees. This happens when there is too much water settling down around the roots, which causes the roots to be constantly in still water. You can recognize this by a couple signs. The most important root-rot fungi (Pythium and Phytophthora species) are called water molds because of this affinity for wet soil. Root rot normally starts at one part of the root system and progresses around the plant. Because of this, one branch or one side of a shrub or tree may die at a time. You may also see mold or fungi growing on the soil's surface above the roots or up the side of the tree's base.
When you see dying leaves that have blackened or have black spots on them, this is a sign of overwatering. They can occur at any part on the leaf, or may be the entire leaf. They usually appear first on older leaves.
Plants seem to wilt whether they are overwatered or underwatered. When overwatered, the leaves, blossoms and branches may wilt, making gardeners think they need more water. However, the wilting is caused by root death from the plant not being able to take up water, therefore dying from a lack of water in waterlogged soil. Check for possibility of root rot if desired by digging into the root zone. Soil that has been too long without oxygen usually smells sour or rotten.