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As with any plant, some years your lilac will bloom.

A second way to prune old lilacs is to cut back the overgrown shrubs over a three-year period. Begin the procedure by removing one-third of the large, old stems at ground level in late winter. The following year (again in late winter), prune out one-half of the remaining old stems.

Also, thin out some of the new growth. Jul 08, Most flowering shrubs need regular pruning to keep them vibrant, and the common lilac (Syringa vulgaris) is no exception. Lilac bushes will typically flower without any effort from you. However, if left to grow and spread on their own, common lilacs will eventually only flower on the tops of the uppermost branches. Aug 27, The Lilac borer (or ash borer, a type of clearwing borer moth) tunnels into lilac branches.

Signs include sawdust, sap and frass (excrement). Some plants tolerate this damage. Others experience dieback of branches and sometimes death of the entire plant. People are unlikely to notice them. Apr 02, Knowing when to trim lilac bushes is important. 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. Lilacs bloom on newer growth, so the blooms will be on the new younger branches growing out from older trunks.

Therefore as the bush gets older and older and puts out more and more new branches, since it blooms better on those newer branches, gradually the blooms are all way up high and unreachable to gather for bouquets.

Jun 01, Read on for all the information you need about moving lilac shrubs. Moving Lilac Shrubs. Lilac bushes are lovely, fragrant additions to any home garden. They are also versatile shrubs, filling in as border plants, specimen ornamentals or as part of flowering hedges. If you are thinking your lilac would look or grow better in another location.