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Outstanding Features:
Interesting corky, fissured bark. Clean foliage and fast growth rate.
Description:
Height: 30-50'
Width: 30-50'
Hardiness Zone: 3b
Corktrees have a broad, rounded crown without
a strong central leader. They have a rapid growth rate when young.
The gray-brown bark becomes fissured and corky with age. Branching
tends to be quite low. Sexes are separate. Flowers are greenish and
not very conspicuous. Females produce large clusters of fleshy black
fruit which remain on the tree into the winter. Leaves are pinnately
compound with 513 leaflets. The medium green leaflets are 3"
long and develop a good yellow fall color.
Requirements and Culture:
Prefers a rich, moist, well drained soil. Tolerates a wide range of soil pH. Full sun. May require pruning to train up to a desirable form.
Limitations:
No serious insect or disease problems. Has a tendency to grow late
into the season as seedling trees and frequently suffers winter
injury to the branch tips as very young trees. Use only male plants
in areas where fruit litter and seedlings would be a nuisance.
Species and Selected Cultivars:
P. amurense
Amur Corktree is the best known and most widely grown of the genus.
It grows rapidly and has a broadheaded crown.
`Macho' is a male
selection of Amur Corktree that has ascending branches.
P. sachalinensis
Sakhalin Corktree is slightly more upright in habit and has a more
rounded crown. It perhaps has a better form for more landscape situations.
It is not as well known and is not readily available in the nursery
trade.
Photo Credit:
1 MLA; 2 E. Hasselkus. Photo 1 is `Macho'.
Minnesota Power | University of Minnesota | Northern
States Power Company
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CORKTREE Phellodendron species