Hydrangea macrophylla Onyx™ Peacock is really as colourful as a peacock with its blue and purple flowers and beautiful black stems. A perfect choice as a solitary on your balcony, for in a shrub border, in mass planting or mixed containers. Onyx™ Peacock flowers in summer and is hardy to USDA Zone 5a. This compact shaped shrub becomes 49” tall and 20” wide and prefers a moist but well-drained soil in the sun or partial-shade. Onyx™ Peacock is deciduous and can be pruned in winter.