Q.spirea bush pruning
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?

Alisma
Certified GKH Gardening Expert
Certified GKH Gardening Expert
Answered on August 11, 2016
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/
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