Answer: Hydrangea paniculata 'Limelight' can grow very large and even into a tree shape! Your hydrangea blooms in late summer which means it blooms on the new growth of the season. Although you can prune it back now, you don't really need to. Instead, you can wait until early spring to prune it back and make it more compact. All of the new stems it develops should develop flower buds. This fall those flowers will change to a pinkish color. It's a beautiful plant and you made a great choice. Enjoy!
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