Q.keeping dogwood healthy
What can I do now to keep a dogwood tree healthy that’s looking sickly? There appears to be a number of dead branches on the tree.
Below are some links I am going to recommend you review which will help you trouble-shoot your tree. If none of the below information resonates with what's happening on your tree, I advise you to contact a local arborist.
The dead branches - is only one side of the tree affected? If so, it could potentially be verticillium wilt disease, which dogwoods are susceptible to. Here are some articles for your review:
http://www.extension.umn.edu/garden/yard-garden/trees-shrubs/verticillium-wilt/
https://bit.ly/1HoK0tQ
Dogwood Leaf Drop: Reasons Why Leaves Are Falling Off Dogwood:
https://www.gardeningknowhow.com/ornamental/trees/dogwood/dogwood-leaf-drop.htm
Common Dogwood problems: Pests & Diseases of Dogwood Trees:
https://www.gardeningknowhow.com/ornamental/trees/dogwood/common-dogwood-problems.htm