Two years ago, we had our white flowering dogwood tree trimmed and pruned...
Two years ago, we had our white flowering dogwood tree trimmed and pruned back about two feet. It was quite "leafy", but did not bloom last spring. I have always understood that dogwood trees "set" their buds in the fall, but our tree does not seen to have many buds. It also has some green "algae" or moss on the trunk and part of the branches. Is the tree healthy, and should I feed it in early spring? Thanks you so much for your help.
It can take a couple of seasons or more for a tree to bloom again after being pruned. Two feet is a considerable amount to prune off of a dogwood tree. Except for dead, damaged or diseased branches they really do not need to be pruned. The green algae you mention most likely are lichens. They grow on slower growing trees but does not cause problems, see the following information, http://extension.umd.edu/learn/lichens
Lack of buds does not seem like a reason to fertilize the tree. Most likely the tree will bloom again next year.