BushDoctor
Certified GKH Gardening Expert
Certified GKH Gardening Expert
Answered on April 5, 2020
Generally, you will prune them just after flowering. You may want to prune them as they each mature, but it isn't completely necessary. They tolerate pruning, very well!
Here is an article that will help:
https://www.gardeningknowhow.com/ornamental/shrubs/spirea/pruning-spirea-shrubs.htm
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