Spiraea trilobata, known as Asian meadowsweet, is a species of flowering plant in the family Rosaceae. It was first formally named in 1771. Spiraea trilobata is native to Asia. It has occasionally naturalized in the United States.
Most established plants grow best if fertilized with a light hand. Fertilize our specimen trees and shrubs just once -- in early spring -- with a light but even coverage of a balanced, granular fertilizer (such 5-10-10, 10-10-10, or an organic fertilizer).
Japanese spirea should be tip pruned in late winter or early spring prior to bud swell and before the shrub leafs out. Also, at this time, remove any dead, damaged or diseased stems along with those that cross each other. To keep spirea looking great and to promote blooming, trim the plant at least twice per year.
Dwarf varieties like Spirea Japonica “Nana” are ideal for growing in a container. It requires slightly moist soil to grow.