Hydrangeas are often planted with azaleas because they provide beautiful blooms during the fall season. You can also plant them in pots so you can enjoy them indoors during the winter months. When planting them together, there are some things you need to consider. You need to plant them at least three feet apart from each other so they have enough room to grow and spread their roots. This will help them remain healthy and beautiful throughout the years. When choosing which type of hydrangea you want to plant with an azalea, there are several types to choose from. These include blue hydrangea, macrophylla hydrangea, lacecap hydrangea, oakleaf hydrangea, panicle hydrangea, paniculata hydrangea, poodle hydrangea, rose-of-sharon hydrangea, rupestris hydrangea, snowflake hydrangea, tea hydrangea, and weeping blue hydrangea.