Slow-growing, Hydrangea macrophylla 'Pia' is a dwarf mophead hydrangea with small, rounded flower heads, up to 4 in. across (10 cm), densely packed with pink to purple-red florets from mid to late summer. Unlike other bigleaf hydrangeas, the flowers will retain their pink color regardless of soil pH. The foliage is dark green with large, glossy, serrated leaves. 'Pia' is perfect to create a low hedge and lovely in window boxes or containers.

• This deciduous shrub has a round habit, typically growing 2-3 ft. tall and wide (60-90 cm).
• A part shade lover, it is best grown in rich, medium moisture, well-drained soils. Full sun is tolerated if constant moisture is provided.
• No serious pest or disease issues. Watch for bud blight, bacterial wilt, leaf spot and mildew.
• Perfect from foundation plantings to container plantings. Massed in a sheltered location or as an accent plant. Effective as an hedge and makes excellent cut flowers too!
• Remove spent flowers to promote new blooms.
• This beautiful deciduous shrub should be pruned after flowering by cutting back the stems to a pair of healthy buds. Prune out weak or winter-damaged stems in early spring.
• Hydrangea macrophylla species is native to Japan. It is reported from seaside habitats as well as mountains in Japan, from Honshu southwards. This species has naturalized in China, New Zealand and the Americas.
• May cause mild stomach upset if ingested, contact with foliage may aggravate skin allergies. Wear gloves and other protective equipment when handling.
• Toxic to dogs, toxic to cats, toxic to horses.