I have over crowded lilac trees that i have pretty much butchered :( They were as tall as the dead pine tree that I plan on removing and getting new one. I want to keep the lilacs but try to maintain them properly. I completely took one out next to the pine tree cause it was dead from too much shade. Should I put a certain kind of mulch around the base of the lilacs? Should I wait till next year to try to remove more dead branches and bigger branches? Any pointers would be greatly appreciated. I need help sooo bad. Thank you for everyone that has any ideas for my backyard.