Jun 19, The best time for pruning older lilac bushes is right after their flowering has ceased. This allows new shoots time to develop the next season of blooms. Pruning too late can kill young when is it safe to trim lilac bushes buds. Deadheading, should be done as soon as possible after the flowers treecleanup.buzzted Reading Time: 3 mins.
A lilac bush does best when it is trimmed every year. Doing so helps to maintain the plant's shape and to minimize the number of old, damaged branches, which are vulnerable to disease. Oct 06, You should resist the temptation to prune or trim your lilac bush until it is at least 6 ft.
tall, which typically occurs during the second or third year of growth. At this point, there will be enough excess stems and blooms for optimal shaping. This is the best time to prune them, to clear out old flowers, branches, and leaves.
By the end of June or July, the bushes start budding. If you trim the branches that have started bearing buds, you might lose a consistent quantity of flowers the following spring.
Hence, make it a point to avoid pruning the bushes in late June or treecleanup.buzzted Reading Time: 4 mins. Jun 03, Pruning lilacs is best done within a few weeks after the blooms fade. Trim them with bypass pruning shears, cutting blooms off just above the place the stem forks beneath the bloom.
Old growth should also be cut back every few years to help keep.