spirea bush pruning

Question

My spirea shrubs have gotten overgrown and mostly branches vs. leaves. Can I trim them right down to the ground and will that make them fill in? Do they need to be dormant to trim them?

Answer 1

These articles will help you:

https://www.gardeningknowhow.com/ornamental/shrubs/spirea/growing-spirea-shrubs.htm
http://www.extension.umn.edu/garden/yard-garden/trees-shrubs/pruning-trees-shrubs/