Dogwood trees in our community are distressed, leaves on edges brown and crinkly, leaves dry & droop
We have a number of trees in our Annapolis community that have the above symptoms. The trees are in a waterfront community and developed these symptoms during a dry week at the end of the spring season. After rains started, the leaves stopped crisping. Some trees are in a lot of sun, others in a lot of shade.
Anne Arundel County Maryland
Your dogwood may have more than one disease problem (not to mention it may need watering since many areas in Maryland have not gotten rain for weeks.)
On our website, put "dogwood" in the search box. Look at the info on Elsinoe leaf spot and powdery mildew. Powdery mildew is a relatively recent problem that is sapping the energies of many dogwoods.
Also look at the first entry, the IPM Series: Dogwood, which has a diagnostic chart that may be helpful, followed by info on each possibility.