Renovating An Overgrown Spiraea - Knowledgebase Question

Indiahoma, OK
Question by raco6
January 4, 2000
I have a ten-year-old spirea which produces white blooms in April. It hasn't bloomed well the last few years. The base is about a foot across and the branches are very dense. It's too crowded for me to prune out only the old shoots. Can I cut the whole plant to the ground and let it regrow, or would that kill it?

Answer from NGA
January 4, 2000


The general rule of thumb is to prune no more than one-third of a plant at any time to reduce shock, you can renew a spiraea by cutting all the branches to within a few inches of the ground. Prune spring-flowering spiraea after bloom is complete; prune summer-blooming spireae in late winter or early spring. Good luck!

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