Kwanzan Cherry (Prunus serrulata 'Kanzan'): The Quintessential Flowering Cherry

The Kwanzan cherry (often spelled Kanzan) is arguably the most famous and widely planted of all flowering cherries. Its profusion of double, deep-pink blossoms in mid-spring creates an unforgettable spectacle, making it a centerpiece of cherry blossom festivals worldwide.

Botanical Profile

• Family: Rosaceae (rose family)
• Genus: Prunus
• Species: serrulata
• Cultivar: 'Kanzan' (syn. 'Kwanzan', 'Sekiyama', 'Sekizan')

Floral Display

Each pendulous cluster bears 3–5 double flowers, each with 20–30 petals, opening from deep-pink buds to a slightly lighter pink. The bloom period lasts 2–3 weeks, typically coinciding with or just after leaf emergence. Young leaves are bronze-red, maturing to dark green, then turning orange-bronze in fall.

Culture and Care

Kwanzan cherry prefers full sun and moist, well-drained, slightly acidic soil. It is hardy in USDA zones 5–9 but may suffer from heat stress in the deep South. It is susceptible to several pests and diseases (borers, canker, leaf spot), so good cultural practices—proper spacing, mulching, avoiding mechanical injury—are essential for longevity. Typical lifespan is 15–25 years.

Landscape Uses

Planted as a specimen, in rows along drives or streets, or in groups for maximum impact. Its vase-shaped habit (25–30 feet tall and wide) provides a graceful silhouette even in winter. Because it produces no fruit, there is no messy cleanup.