This genus consists of about 70 species of mainly deciduous, but sometimes semi-evergreen, flowering shrubs from the rose family (Rosaceae). They are found in many northern temperate areas, mainly in eastern and southeastern Asia, as well as in North America. Plants are highly appreciated for their flowering and foliage qualities. Leaves are simple and alternate, variously toothed and lobed, and may have gray or blue-gray downy undersides. Many species have attractive golden, orange, or bronze foliage over autumn. Flowers are borne in dense profusions in clusters, on terminal panicles, or along branch tips in spring or summer. The color range is generally white, yellow, pink, or crimson. The genus Spiraea is commonly known as bridal wreath.
CULTIVATION
They thrive in most soils, though some grow poorly on chalk, and prefer a sunny position and cool moist conditions. For prunning purposes, these plants fall into 2 groups: those that flower on the current year's growth, which can be hard pruned in spring, and those that flower on the previous year's growth, which should have old flowering shoots removed just after flowering. Propagation is from soft-tip or half-hardened cuttings in summer.
Top Tip
A second bloom will occur if spent flower clusters are removed after the first flowering. However, the second bloom will be less profuse.
CULTIVATION
They thrive in most soils, though some grow poorly on chalk, and prefer a sunny position and cool moist conditions. For prunning purposes, these plants fall into 2 groups: those that flower on the current year's growth, which can be hard pruned in spring, and those that flower on the previous year's growth, which should have old flowering shoots removed just after flowering. Propagation is from soft-tip or half-hardened cuttings in summer.
Top Tip
A second bloom will occur if spent flower clusters are removed after the first flowering. However, the second bloom will be less profuse.
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