The common ninebark tree (Physocarpus opulifolius) is a deciduous shrub that occurs along the edges of woodlands, near stream banks and on stony hillsides in the United States and Canada. Homeowners plant ninebark trees as hedges and screens.
Ninebark trees grow between 6 and 10 feet tall with an equal spread. They have reddish-brown exfoliating bark, 1- to 3-inch-long green leaves with three to five lobes, multiple stems and curved, spreading branches. They produce rounded clusters of pinkish-white blossoms late in the spring. Reddish seed capsules replace the blossoms.
Ninebark trees are hardy in the U.S. Department of Agriculture plant hardiness zones 2 through 8. They prefer full sunlight or partial shade and grow well in a variety of different soil types. They have few disease or insect problems.
Ninebark trees are available in several different cultivars. Snowfall, which grows around 7 feet tall, has particularly attractive foliage. Other cultivars include Dart's Gold, which grows around 5 feet tall and produces yellowish leaves, and Monlo, which produces deep purple foliage in cool climates.
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