Divide your spirea in the late fall when the plant is dormant.
Mar 30, Shape the spirea during this rejuvenation pruning, also. Creating a professional-looking, rounded shrub is easy. Tie a rope around the middle of the spirea. Using sharp hedge shears, cut straight across the top of the bush. When the rope is removed, the bush pops back nicely rounded. Prune the bush throughout the year as stumpdrop.clubted Reading Time: 5 mins.
Oct 25, Fall is the time for the most severe pruning of spirea. With sharp shears, cut each stem back to about 8 inches (20 cm.) from the ground. Don’t worry that the plant won’t bounce back. In the spring, spirea will reward you’re courageous pruning with new stems and plenty of blossoms.
Japanese spirea should be tip pruned in late winter or early spring prior to bud swell and before the shrub leafs Estimated Reading Time: 2 mins.
Mar 02, Tie a piece of rope around the center of the shrub. Trim straight across the top of the plant, and when you release the rope you’ll have a perfectly rounded spirea. The two main trimming periods, in early spring and after blooming, are most important to do each year, but you can also trim your spirea as needed throughout any stumpdrop.clubted Reading Time: 2 mins.
The Best Time to Prune Spirea Most of the varieties of spirea can be pruned after their blossoms. It is seldom to trim them during the spring season, but there are some that should be strictly pruned at that time only.
The ones mentioned above are examples of this shrub that require pruning on or before the month of June stumpdrop.clubg: Irvington VA. 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 pruning for overgrown shrubs, Missing: Irvington VA.