
GKH_Susan
Certified GKH Gardening Expert
Certified GKH Gardening Expert
Answered on May 19, 2020
My guess without seeing the issue at hand is that they need to be fertilized or have succumbed to an infection. Cutting back any growth that is completely dead will be a good place to start.
For now, here is an article for their general care: https://www.gardeningknowhow.com/ornamental/shrubs/spirea/growing-spirea-shrubs.htm
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