ninebark

Question

My ninebark shrubs are looking thin and sickly. they are several years old–what can I do to rejuvenate them? they are the red variety

Answer 1

You can do a severe prune during dormancy to help rejuvenate your shrubs.

https://www.gardeningknowhow.com/ornamental/shrubs/ninebark/growing-ninebark-shrubs.htm