Twiggy growth should also be removed.

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 olive bush pruning 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. Jul 08, The general shrub pruning rule is to cut no more than a third of the stems each year. 2  That will help the plant remain constantly vital, with new stems developing as old stems bloom.

Your goal is to have a lilac bush that has somewhere between eight to 12 stems of various ages, all of them between 1 to 2 inches in diameter. Apr 27, If the lilac is not grafted you can cut the entire plant off at the ground but don’t expect any blooms for a couple years.

Pruning to the ground is the most drastic method but it does work. Less intense renovation prune You can also do a renovation prune over a 3 year stumpmulching.bars: Lilac bushes are some of the plants which need this for proper, orderly growth. You can start pruning them when they are years old, and have established themselves well.

In their case, it is important not only to prune, but also to do so at the right time of the year. Here are certain tips that may guide you on how to prune lilac stumpmulching.barted Reading Time: 4 mins.

If you want to grow beautiful lilac bushes in your garden, then you’ll need to learn how to prune them properly; think of it as the most important step in your lilac care routine. Pruning lilacs is the best way to encourage your shrub to produce generous blooms, Spring after Spring.

You don’t need anything fancy to prune lilac bushes – all you need is your pruning shears, loopers, and long-sleeve garden gloves to Estimated Reading Time: 7 mins.