Nov 23, If the spirea is generally in good shape, trim the stems back by one-third to shape and reduce the size of the shrub. Purdue University suggests renewal Missing: Wakefield MA. Cut back the tips of most spirea varieties immediately following the first flush of spring flowers.
Trim the stem tips back to the topmost leaf bud on each stem, using clean shears. Maintain the shape of the shrub as you prune. Tip pruning removes the dead blossoms and Missing: Wakefield MA.