Hydrangea, Ruby Slippers Oakleaf HydrangeaRuby Slippers Hydrangea is a compact deciduous shrub with large oak like leaves that turn red in fall and exfoliating bark. Its large panicles held above the foliage bloom white and quickly turn deep pink in summer attracting pollinators. Best bloom in part sun and rich, moist well drained soils. Hydrangea quercifolia is one of the species of hydrangea that acts as a pollenizer, attracting a large number of bees, butterflies, and hummingbirds.