Cityline Rio is a gorgeous Hydrangea with bold colours of deep blue in acidic soil and deep purple in alkaline soil. In neutral pH you can get a mix of royal purple and royal blue. The Cityline Series are dwarf shrubs growing three feet tall and wide requiring no pruning. It is best if you don't as they only bloom on old wood. They are perfect for small spaces and even a large pot.
Asia and the Pacific - Asia - China and Japan
Cool, moist, shaded locations in rich soils of woodlands and along hedgerows and streambanks.