confused about pruning & separating plants

Hi,

Thanks for writing! The best time to prune a butterfly bush is in early spring --- just before or as new growth begins for the season. You can cut it back as far as you wish --- even back to 1 foot tall.

Hydrangeas are shrubs and as such, don't need to be divided or separated. Just let it grow and enjoy it!

---Justin, Senior Garden Editor, BHG.com