Answer: Hydrangea's have the capability of growing up to 25' tall, so choose carefully! Hydrangea arborescens 'Annabelle' is about the only one that will remain under 5' tall. It's a smooth-leaved hydrangea that produces enormous clustersof white flowers throughout the summer. If you plant 'Annabelle', provide a large container and plan to prune her back when she gets out of hand.
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