Pink Diamond Hydrangea: Stunning Blooms from Summer Through Frost

The Pink Diamond Hydrangea (Hydrangea paniculata) traces its lineage to Japan, China, and Korea. Developed from the popular 'Pee Gee' hydrangea (introduced to England in 1861), Belgian breeders Jelena and Robert de Belder created "Unique" in the 1960s, from which Pink Diamond emerged as a 1980s cultivar. This refined shrub typically reaches 6-8 feet tall with a 10-foot spread (rarely to 22 feet), clears 2 feet at the base, grows at a medium rate, and lives 40+ years.

Spectacular Flower Progression

Blooms open soft pink in mid-summer, mature to creamy white conical clusters, then transition to warm pink, deepening to impressive deep pink by fall—often lasting until first frost. Unlike Pee Gee, these lighter, daintier clusters (fertile and sterile florets spanning ~1.5 inches) don't flop under their weight. Deep green foliage turns yellow in autumn.

Cultivation and Care

Blooms on new wood—prune late winter or early spring. Prefers slightly acidic, moist, well-drained, fertile soil; never let it dry out. Full sun to light shade. Thick mulch protects roots in colder zones. High maintenance but rewards with excellent cut flowers and landscape focal points. In northern climates, plant in wind-protected areas.