Q: I planted two Ruby Slipper hydrangeas in one pot when they were small. They grew a whole lot faster than I had anticipated. I need to separate them but they are close together and I am afraid of damaging the main taproots.

A: ‘Ruby Slippers’ is a standout oakleaf hydrangea. Although the blooms open white, they quickly change to pink, then rose, and stay that way for weeks. I think December is a fine time to divide the plants. Having no leaves, they should be easy to hoist from their pot and shake the dirt loose from the roots. They can be planted in a new spot and watered once to settle the soil.