Genus: Spirea

Spiraea

Photo/Illustration: 
Courtesy of Bailey Nurseries
Spirea (Spiraea)
spy-REE-ah
Rosaceae
About 80 species make up this genus of deciduous or semi-evergreen shrubs. They are grown primarily for their small but profuse white, yellow, pink, or purple flowers in spring or summer. Use spirea in a mixed or shrub border, as a groundocver, in a rock garden, or as hedging, depending on growth habit.
Noteworthy characteristics:  Flowers profusely.
Care:  Fertile, moist but well-drained soil in full sun. If plant flowers on previous year's wood, prune after flowering by cutting back flowered shoots to strong buds, young lower growth, or basal growth. For those that flower on the current season's wood, cut back to a low permanent framework as buds begin to swell in early spring
Propagation: 

Take greenwood cuttings in summer. Suckering species can be divided in late autumn or early spring.

Problems: 

Spirea can be affected by dieback, fireblight, powdery mildew, Cylindrocladium leaf spot, weevils, scale insects, and aphids.

Species, varieties and clutivars for genus Spiraea

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Fritsch spirea
Spiraea fritschiana
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Japanese spirea
Spiraea japonica 'Alpina’
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Spiraea nipponica ‘Snowmound’