how long does it take for a lilac tree to grow
Finally, the maturity of individual lilac branches is important. Lilacs bloom on year-old shoots on 2- to 3-year-old branches. Prune them only in the late spring after they flower. This year's new shoots provide next year's blooms.If a branch is cut off at the base, new wood that comes up from the base of the plant must mature before it can send out flowering shoots. 1  Dig This.inally, the maturity of individual lilac branches is important. Lilacs bloom on year-old shoots on 2- to 3-year-old branches. Prune them only in the late spring after they flower. This year's new shoots provide next year's blooms.