How to Divide a Lilac Bush

Question

We live in southern Ontario. Existing lilac bush is growing beside house facing south. Beautiful blossoms.  I would like to divide to place in other areas of the yard. Thank you.

Answer 1

Nikki – Certified GKH Gardening Expert | Report Abuse

Most transplanting takes place in spring or fall (preferably fall). If you can ensure that the majority of the roots and surrounding soil is lifted and replanted in suitable growing conditions, you’ll have a greater chance of success. To reduce shock, trimming may help. Here is an article that you may find helpful: https://www.gardeningknowhow.com/plant-problems/environmental/learn-how-to-avoid-and-repair-transplant-shock-in-plants.htm

As for dividing the lilac, it is unlikely you’ll be able to do so though you can obtain or dig away the shoots to make additional plants. Dig down from the main clump, exposing the roots and cut the shoot away from the mother plant. Make sure you include roots. Then simply plant the shoot in a suitable location, watering regularly until it takes hold.

A much better and easier way of propagating lilac is through cuttings. This article will help:
https://www.gardeningknowhow.com/ornamental/trees/tgen/how-to-root-cuttings-from-various-shrubs-bushes-and-trees.htm