Hydrangea grafting is uncommon - in fact, I have never heard of it. Most
tree forms are PeeGee's (paniculata 'Grandiflora' ) trained in that form
over time by careful pruning. I suppose you could attempt to graft other
hydrangea species to a paniculata rootstock, but it would still take the
same time and pruning techniques to develop into a tree form.
pam - gardengal
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