Of the many species of Spiraea available, we grow dwarf cultivars of japonica and one of its hybrids, x bumalda. Very commonly used for many years as they are easy to grow in a variety of conditions. Clusters of small dainty flowers bloom in spring and summer. Some cultivars have the additional feature of attractive colorful foliage. Relatively disease and pest free and best grown in full sun in well-drained acid soil.