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Spirea can be trimmed lightly or severely depending on what you are trying to accomplish. If you just want to clean up the spent flower blooms, just cut them off with pruners. Depending on your climate and when you do this, you may get additional blooms the same season.

If you want to control the size of the plant to keep it smaller, you can cut it down to any length you desire. This is best done in the early spring or late winter before new growth comes out. If you wait later, you will be risking losing that season's blooms. Spirea are very very durable and they will take most anything. I have sometimes cut it back from 4' to 1'. Shape it to mimic its natural shape, mounded. The general rule for pruning trees and shrubs is never remove more than a third of the plant. But spirea do not read the rule books and you can break this one!

As far as I know, the above applies to all types of spirea.

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16y ago
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Q: How do you trim spirea?
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