A very cold hardy selection of Katsura introduced by the North Dakota State research foundation. The tree has survived without damage in USDA Zone 3 at -37 °F. The foliage emerges a deep bronze color and the changes to blue green through the growing season until turning an apricot yellow in the early fall. Early fall dormancy helps with its winter hardiness.
Cercidiphyllum japonicum ‘Kooldak’
KoolKat® Katsura Tree
USDA Zone: 3b
Height: 35′
Spread: 25′
Description:
Shape
Pyramidal, opening with age
Foliage
Bronze changing to blue green
