Asked October 18, 2021, 1:01 PM EDT
Montgomery County Maryland
They may be out there, but we are not aware of a resistant ornamental plum for our area. If you are looking for a tree with burgundy leaves there are some options like our native Prunus virginiana 'Canada Red' (leaves begin green and turn purplish), native Redbuds 'Forest Pansy' and 'Merlot', and the 'Black Diamond' series of Crapemyrtle.
For ornamental cherries, it is the Yoshino types that tend to get so much leaf spot/shothole disease and early defoliation. Kwanzaan Cherry trees with fluffy, fully double pink flowers and 'Mt. Fugi' with white ones do better here.
You are quite welcome and I am pleased to have been awarded the designation.