How do I know when to trim a Hydranga tree?

Joanne
by Joanne

I planted a hydranga tree two years ago. It is doing well but is becoming too large and oddly shaped. The weight of the flowers on the bottom branches make them droop, while the top branches stand upright, leaving a very odd looking middle. Can I prune off the bottom branches to make it more “treelike “. If so should I do it now or in the spring? I am in zone 7b.

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