Young spring leaves on a Japanese spirea bush appear red.
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 bushmulching.barted Reading Time: 5 mins.
Mar 02, You should actually prune your spirea more than once a year, at least twice. Give it a good trim after it flowers in the spring by cutting back the tips of the stems to the top leaf bud.
This removes the dead blossoms and also may trigger a second blooming and new leaf growth. You can also shape the shrub at this time.