Threelobe Spirea
Spiraea trilobata (spy-REE-ah try-lo-BAY-tuh)
Spiraea trilobata , or Threelobe Spiraea, is a spiraea cultivar. It is a dense, upright, compact deciduous shrub that typically grows to 3-4' tall with a slightly larger width. This cultivar is noted for its numerous white flowers displayed in crowded umbels in spring. The flowers, which are attractive to butterflies, are offset by three-lobed, coarsely-toothed, blue-green foliage. You can remove faded flower clusters to promote additional bloom and, once flowering has ceased for the season, you can prune the plant. Because the plant has a dense, compact habit, slender with spreading branches, selective pruning may be all that is necessary. Threelobe Spiraea is easily grown in average, medium, well-drained soil in full sun to part shade. It can tolerate a wide range of soils, including sandy sites, but prefers a good loamy soil. It also tolerates drought. In its native habitat, it is typically found in thickets or ravines, sunny slopes, and along roadsides. Insects, Diseases, and other Plant Problems: Susceptible to many of the diseases and insects that attack other members of the rose family, including leaf spots, fireblight, powdery mildew, rots, aphids, leaf roller and scale. More information on Spiraea .
Source: NC State Extension Gardener Plant Toolbox ↗ NC State Extension Gardener Plant Toolbox, 44 attributes.