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 Prune lilacs soon after bloom To keep your lilacs looking their best, they need to be pruned, fertilized and shaped almost every year, soon after they are done blooming in the late spring. Peg Herring | May 20, 2005 | News story