The best time for pruning lilac bushes is right after their flowering has ceased. If you are pruning lilac trees or shrubs entirely to within inches of the ground, it is best to do so in early spring. New shoots will develop during the regular growing season as long as there are a few healthy shoots left.
Jul 08, But they rarely require maintenance pruning, though you can prune when necessary for shape. And like other lilac varieties, they also can benefit from deadheading.
Deadheading is the practice of removing dead blooms from a plant by hand. Nov 17, For lilacs, the recommended method is generally to remove one third of the old wood each year immediately after flowering and shape the shrub over a number of seasons. Of course, you can prune in the fall if absolutely treeclearance.buzzted Reading Time: 2 mins.