Ruby Slippers is a compact oakleaf hydrangea that is perfect for smaller landscapes and containers. Blooming white in the summer and aging to deep pink in the fall. this Wizard of Oz namesake produces robust blooms and sturdy. upright stems. Dark green and oak-like foliage also turns color with the changing seasons. from green to mahogany. Ruby Slippers thrives on partial shade and partial sun and regular watering to keep the soil moist.