I have dead flowers from last year's spring bloom. Can I cut them off for this spring? One year I did that and I did not get any blooms. Help! I go through this every year and love my Lilac tree (it's like 15 years old and 9 feet tall).
Certified GKH Gardening Expert
Here is an article that you may find helpful: https://www.gardeningknowhow.com/ornamental/shrubs/lilac/pruning-lilac-bushes-when-to-trim-lilac-bushes.htm