Spiraea betulifolia aka White Spirea

Spiraea betulifolia is a small shrub in the rose family. Its common names are birchleaf spirea and white meadowsweet. It grows wild in eastern Siberia and Korea. Its range also covers northern and central Japan. It grows in temperate regions and sheds its leaves each year. Its common name comes from its birch-like leaves. The species forms a low mound that fits small gardens.

In gardens, it grows about 3 feet (0.91 metres) tall and wide. Dense leaves give the shrub a round shape. Some plants grow upright. Others spread low at the base. Oregon State notes sparse branches and scaly bark. The bark has cinnamon-brown tones. The leaves grow one at a time along the stems. Some are round, while others have an egg shape. Their edges have teeth. The tops are light green, and the undersides are paler. In autumn, the leaves turn orange, red, and purple.

Small white flowers form wide groups with flat tops. These groups are called corymbs. Some flowers have a slight pink tint. Their scent adds interest while the plant blooms. The groups of flowers add interest too. Chicago records bloom in May and June. Missouri reports bloom in midsummer. Flowers grow on new shoots and draw butterflies to the garden. The small fruits are called follicles. Each is about three millimetres long. They often grow in groups of five.

Missouri recommends full sun for growing this shrub. Oregon State also says it can grow in partial shade. It does best in moist soil that drains well. It grows in a wide range of soils. It needs little care. Chicago lists USDA zones 4–8 for this plant. Oregon State confirms it is hardy to zone 4. Prune in late winter or early spring as needed. Cutting off old flower groups can help bring more blooms. Light shearing is another way to remove these spent flowers.

Use it alone or in groups in a rock garden. It also fits shrub borders and beds near buildings. Its low height suits hedges beside paths and walks. Chicago lists it as deer resistant. Butterflies visit its flowers. Major pest and disease problems are rare, but some can occur. Leaf spot and fire blight may affect the shrub. Powdery mildew and root rot may affect it too. Aphids, leaf rollers, and scale may also attack it.