Atlantic Ninebark
Scientific Name: Physocarpus opulifolius var. intermedius (Rydb.) B.L. Robins.
Synonym: Opulaster intermedius, Physocarpus intermedius
Family: Rosaceae
Opulaster intermedius, Britton, N.L., and A. Brown. 1913. Illustrated flora of the northern states and Canada. Vol. 2: 244.
Sunset®: 1-3,10
USDA: 2-8
Sun Exposure: Full sun to partial shade
Origin: Eastern North America from Quebec south to Tennessee
Growth Habits: Deciduous shrub, 4 to 5 feet tall and wide (1.2-1.5 m); palmate, 3 to 5-lobed leaves, 1 to 3 inches long (2.5-7.5 cm)
Watering Needs: Low to moderate water
Propagation: Cuttings
The variety intermedius is smaller than the species. The species can reach 10 feet tall and wide (3 m). Common cultivars are:
'Nanus' is even shorter than intermedius.
'Dart's Gold' and 'Luteus' have yellow foliage, up to 5 feet tall (1.5 m).
'Nugget' has also yellow foliage, denser than 'Dart's Gold', and can reach 6 feet tall (1.8 m).
'Monlo' has red new foliage.
Blooming Habits:
Whitish-pink flowers, up to 0.5 inch in diameter (1.2 cm), in 1 to 2 inches wide clusters (2.5-5 cm), in June
Fruiting Habits:
Reddish fruit that ripens in September to October
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