Q.pruning lilac hedge
I have a lilac hedge which is 4-5 ft high and I would like to cut it down to roughly 3 ft. Will I damage the hedge? The hedge is about to start leafing out now. Was going to do this now if I could. Thanks for your help in advance.

You should wait to prune your Lilac shrub until it is done blooming this season.
Read more at Gardening Know How: Pruning Lilac Bushes: When To Trim Lilac Bushes https://www.gardeningknowhow.com/ornamental/shrubs/lilac/pruning-lilac-bushes-when-to-trim-lilac-bushes.htm