An educational awards program of the Elisabeth Carey Miller Botanical Garden

Hydrangea serrataBeni-gaku

mountain hydrangea

Image © Tim Wood/Spring Meadow Nursery, Inc.

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Outstanding Qualities Hydrangea serrata ‘Beni-gaku’ features attractive tricolor, lacecap flowers on a compact, deciduous plant. Flowers emerge white, then darken to pink with deep red edges. The small fertile florets are a dark purple, opening to light blue. As the season progress, all three colors are present at the same time. GPP member Christine Allen notes that it has a “wonderful smoky color in flower and foliage.” In fall the leaves turn dark purple. Complement ‘Beni-gaku’ with blue hostas, purpleleaf snakeroot (Actaea simplex ‘Brunette’), and perennials with dark leaves or hot pink flowers. It works well in a woodland setting or a mixed shrub border.
Culture Hydrangea serrata ‘Beni-gaku’ prefers humus-rich garden soil. It grows best in part shade but will do well in full sun with careful attention to summer watering. It has no serious pest or disease problems.
Growing Habit A ten-year-old Hydrangea serrata ‘Beni-gaku’ is usually 4 to 5 feet high and wide. It is a compact grower with a rounded habit.
Hardiness USDA zones 6 to 9