When to prune Dwarf Korean Lilac Trees
I have three beautiful Dwarf Korean Lilac Trees (not shrubs) which have trunks about 5 inches in diameter and crowns up to 7 feet in diameter. A local landscaper said I should trim them back in the Fall using a hedge trimmer to shape it, i.e., pay no attention to branch structure. However, everything I've read says to wait until after they flower in June to cut them back, but they were talking about shrubs, not trees. What's correct here?