Spiraea japonica is a small deciduous shrub, native to Japan, China, and Korea, that can achieve a height of 2-5 feet and width of 3-5 feet when mature. This plant should be grown in full sun to semi-shade and in well-drained soils. It will tolerate regular water or moderate water, but cannot handle too much water, as it is not tolerant of saturated soils. It is an attractive plant, with tiny pink flowers in flat-topped clusters that arrive in summertime. It is a popular plant amongst butterfly and hummingbird enthusiasts as it will attract both of these species when grown in a garden.
For growers in USDA Hardiness Zones 4-9, Spiraea japonica can be grown in pots, either indoors or outdoors. For those who live in colder regions, this plant should be kept indoors during the winter. For the best care, Spiraea japonica should be mulched and watered regularly. Pruning should not be necessary if the plant is grown in an area with ample sunlight.