Care for Hydrangea serrata 'Benigaku' - Knowledgebase Question

Seabeck, WA
Question by jward72245
February 14, 2000
I have a Hydrangea labeled H. serrata 'Benigaku'. I have not been able to determine if this is considered a Peegee or not. It has lace-cap flowers which are rose if in the sun, and blue if in the shade of neighboring plants. The leaves are green when new, then change to bronze as they age. How do I prune this variety? It is in full sun and seems to be flourishing.


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Answer from NGA
February 14, 2000

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Hydrangea serrata is a subspecies of H. macrophylla, and is considered a big leaf hydrangea rather than a Peegee (Hydrangea paniculata). The lace cap flowers are actually sterile flowers, as opposed to fertile, or fully opening blooms.

Prune your hydrangea after bloom, remembering that flowers form on new shoots growing from old wood. Cut the stems back to a node (leaf scar) where you want new flowering wood to develop the following spring.

Since your hydrangea is performing well, I'd say you're providing all the right growing conditions.

Continued good health to your shrub!

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