To reduce it, cut the tallest trunks with a pruning saw.
Jun 19, Most lilacs don’t require pruning until they reach about 6 to 8 feet tall. 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.
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Pruning too late can kill young developing bushfell.clubted Reading Time: 3 mins. Jul 14, Why it’s best to prune your lilacs in early summer. Once a lilac bush is more than two years old, it requires annual pruning. The best time to grab your clippers and get to work is in early summer, after the flowers have bloomed and faded. Here’s what you should know about caring for lilac bushes and bushfell.clubted Reading Time: 2 mins.
If you can't stand the look of your old lilac or you just want a quicker approach, you can take the drastic measure of cutting back the entire plant to about 6 to 8 inches above the ground in the early spring.
Jun 10, To prune your lilacs, start deadheading in early-to-late spring by cutting the flowers at their base just after they’ve reached their peak. You should also cut any flowers that are already dying so they don’t sap energy that could be used for new bushfell.club: K.
Jun 01, It's not as necessary on older, established lilacs, not to mention a time-consuming job on a big shrub with lots of blooms (this is also true for rhododendrons). The best time to deadhead is within a few weeks after blooming to give your lilac the most time to develop bloom buds for the next bushfell.clubted Reading Time: 7 mins.