Physocarpus opulifolius – Spiraea opulifolius – Common Ninebark – Ninebark –

Description

Physocarpus – Ninebark – There are 10-12 deciduous shrubs in the Rosaceae family, in this genus. They occur in thickets and on rocky slopes, with most from North America and one from Eastern Asia   They have flaking bark and alternate, ovate to rounded or kidney shaped, prominently veined with serrated edges, palmately lobed, mid or dark green leaves which turn yellow in fall. They are grown for their foliage and dense, terminal corymbs of small, cup shaped, 5 petaled, with numerous stamens white or pink flowers, borne in early summer. Grow in a shrub border. Grow in preferably acidic, fertile, moist but well drained soil in full sun or partial shade. May become chlorotic if grown in alkaline soil. Prone to leaf spots, fireblight, powdery mildew, and witches broom. P. opulifolius – Spiraea opulifolius – Common Ninebark – This compact, thicket forming shrub, spreading by suckers is from Central and Eastern North America and grows 10′ feet tall and 15′ feet wide. From arching branches it carries rounded, heart shaped 3 lobed, alternate doubly toothed, mid green leaves, to 3″ long. It has dark brown peeling bark. In late spring and early summer it bears small, cup shaped pink tinged white or entirely pink flowers, held in dense corymbs, 2-3″ across. Flowers are followed by clusters of bladder like, green flushed red fruit, 1/4″ long. Zones 3-7