Hydrangea macrophylla ‘Pia’

compact mophead hydrangea

  • © Joy Creek Nursery

Synonyms: Hydrangea PINK ELF®

Outstanding Qualities

Much more compact in size than most mophead hydrangeas, this cultivar is ideal for smaller spaces or a container. Most likely the summer blooming flowers will be pink or deep rose when purchased, but in the acid soils of the Pacific Northwest the color will eventually become blue or purple. Follow the instructions under Culture Notes below to retain the pink color.

Quick Facts

Plant Type: shrub

Foliage Type: deciduous

Plant Height: 3 ft. 0 in. (0.91 meters)

Plant Width/Spread: 3 ft. 0 in. (0.91 meters)

Plant Height-Mature: 5 ft. 0 in. (1.52 meters)

Plant Width-Mature: 5 ft. 0 in. (1.52 meters)

Hardiness: USDA Zones 7 to 9

Flower Color: blue, pink, purple

Sun/Light Exposure: light or open shade

Water Requirements: regular watering

Seasonal Interest: summer flowers on a compact plant

Wildlife Associations: bees, butterflies

Culture Notes
This hydrangea grows best in light to open shade. A location protected from hot sun will keep the foliage and flowers from prematurely fading or scorching. A rich moist to well-drained soil produces the best growth and flowering. Hydrangeas are not drought tolerant and will grow and flower more prolifically with regular summer watering. The typically acidic soils of the Pacific Northwest will cause the pink flowers to bloom in pale purple and blue tones. For light pink flowers, add lime to raise the pH and sweeten the soil. Have a soil test done to determine the amount of lime. Changing the color can often take a few years to accomplish with more than one application of lime. Remove a few old twiggy branches to the ground yearly or prune lightly to improve the overall shape. Heavy pruning can ruin the flowering for the following year. Consult an experienced pruner or take local classes before attempting substantial pruning.