Lilacs were planted at our new home but I was not there when this was done, so now I don't know how to take care of these young plants nor do I know just what they are. There are several high branches (about 3-4' now) with very few leaves on them. Winter is coming where we will most likely have snow, so do I need to trim these new plants back before freezing weather sets in? They were planted five months ago.
Newly Planted Lilacs
Certified GKH Gardening Expert
The best rule of thumb on pruning lilacs is to do it right after the flowers die off in the summer. Here is an article that you may find helpful: https://www.gardeningknowhow.com/ornamental/shrubs/lilac/pruning-lilac-bushes-when-to-trim-lilac-bushes.htm
This article will help with their general care: https://www.gardeningknowhow.com/ornamental/shrubs/lilac/lilac-care-growing-and-planting-lilac-bush-plants.htm