Dec 10, Whenever possible, avoid pruning the lilac in summer, fall or winter, because the lilac blooms on growth produced during the previous growing season. Delaying pruning. Apr 02, Most lilacs don’t require pruning until they reach about 6 to 8 feet ( m.) tall.
The best time for pruning lilac bushes is right after their flowering has ceased. This allows new shoots plenty of time to develop the next season of blooms. Pruning lilacs too late can kill young developing buds. If you are pruning lilac trees or shrubs entirely to within inches of the ground, it is best to do so in early spring. We do it by leaving the shrub 6" shorter after the spring pruning than we want it to be at bloom time the following spring. Year three and beyond: To keep a dwarf lilac small, start out by accepting that it has the potential to be as big as those at the very top of this page and that you must prune it regularly.
Prune three of the oldest stems at ground level, beginning in the lilac’s third growing season. Removing old growth renews the lilac and provides aeration for the center of the plant.
Lilac trees that are over three years old can safely have these removed as close to the ground as possible. Do this from mid-June onwards. For new lilac trees in their first year, remove all the forming flower buds before they start to bloom. This is usually around the first week of stumpgrind.buzzted Reading Time: 6 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.