Browse resources Displaying 1 - 2 of 2 resources Photo: Lynn Ketchum (Cropped from original) How to recognize, treat and avoid lilac bacterial blight Blackened, wilted shoots on lilac mean trouble. Kym Pokorny | Mar 31, 2023 | News story Photo: AAE (Cropped from original) Will cutting one root hurt this tree? Q: I have a California lilac tree in my back yard. A thick root is underneath the pavers and lifting them up. Will I kill the tree if I cut out that root? I sure don’t want to kill it!A: View answer | View all featured questions