my Spirea Bushes don’t have many leaves on them
My bushes started to come; however, the leaves on them are sparse.
Probably the harsh winter caused them some problems. They should come along in their own time, maybe with a little extra fertilizer. This article on spirea will help you keep them at their best: https://www.gardeningknowhow.com/ornamental/shrubs/spirea/growing-spirea-shrubs.htm