How to Get a Start From an Existing Lilac Bush By: Marci Degman Updated on: April 05, 2017 Part of the video series Vegetable Garden Planting Dates How to Grow Herbs Indoors & Outdoors Tomato Growing Secrets How to Get a Start From an Existing Lilac Bush Related About the Author Marci Degman has been a landscape designer and horticulture writer since 1997.