Japanese Barberry 'Harlequin' is a deciduous shrub prized for its striking red to purple-red foliage and exceptional toughness in challenging growing conditions. This spiny, broad-rounded shrub reaches 3 to 4 feet tall and 3 to 5 feet wide, thriving in zones 4 through 8 with minimal fuss. Its tiny yellowish flowers appear from April through May, followed by showy red berries that persist into winter and attract birds. The genus name derives from the Latinized form of the Arabian name for the fruit, honoring the plant's ancient heritage.
Full Sun
Moderate
4-8
48in H x 60in W
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Moderate
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The 'Harlequin' form displays rich red to purple-red foliage that intensifies in full sun, creating year-round ornamental interest even after leaves drop in fall. Extremely adaptable and resilient, it tolerates drought, clay soils, urban pollution, and poor conditions that would challenge most shrubs. Its natural resistance to deer browsing and impressive hardiness across cold northern zones and hot dry climates make it a genuinely low-maintenance backbone shrub for difficult garden spots.
Japanese Barberry 'Harlequin' functions primarily as a specimen shrub and hedging plant in landscape design. Its dense, spiny branching and low maintenance needs make it well-suited for creating natural barriers and screens, while its dramatic burgundy foliage provides bold color contrast in mixed borders and foundation plantings. The showy berries attract birds, supporting wildlife in urban and suburban gardens where it tolerates pollution and poor conditions.
No timeline data available yet for this variety.
Prune lightly in spring or early summer to maintain shape and remove any winter-damaged branches. Because the spiny stems naturally collect wind-blown trash, occasional cleanup pruning will improve appearance. Avoid heavy pruning that would destroy the plant's natural broad-rounded habit. The 'Harlequin' form is compact and slow-growing relative to the species, so minimal pruning is generally needed.
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“Swedish botanist Carl Peter Thunberg (1743-1828) identified this species in Japan in 1784, and it eventually traveled to gardens across the temperate world. The species Berberis thunbergii was named in his honor, reflecting the 18th-century tradition of naming plants after the botanists who brought them to Western cultivation. The 'Harlequin' cultivar belongs to the forma atropurpurea, a distinctive group selected over generations for their deep red to purple-red foliage, representing centuries of refinement within the species.”