Black Knight Butterfly Bush
Buddleia davidii ‘Black Knight’Black Knight Butterfly Bush is a dramatic flowering shrub prized for its deep velvety purple blooms, sweet fragrance, and exceptional pollinator appeal. Blooming from summer into fall, this classic butterfly bush produces long arching flower spikes packed with rich dark purple florets that create one of the deepest bloom colors available among buddleias. The intensely colored flowers stand out beautifully against the silvery green foliage and bring bold contrast to sunny landscapes.
This vigorous, fast-growing shrub typically reaches 6 to 8 feet tall and wide with an upright arching habit that creates a soft cascading appearance in the garden. Its abundant nectar-rich flowers attract butterflies, honey bees, and hummingbirds throughout the blooming season, making it a favorite for pollinator gardens and wildlife-friendly landscapes.
Black Knight Butterfly Bush is especially valued for its extended bloom period and reliable summer performance. The fragrant flowers continuously appear on new growth, providing months of color with minimal maintenance. Deadheading spent flower spikes can encourage additional blooming and help maintain a tidy appearance.
This butterfly bush thrives in full sun and well-drained soil. Once established, it tolerates heat, drought, and poor soils extremely well. Pruning in late winter or early spring encourages vigorous branching and heavier flowering during the growing season.
Care Instructions
Planting: Plant in full sun for best flowering and compact growth.
Soil: Prefers average, well-drained soil and tolerates poorer soils once established.
Watering: Water regularly during establishment; drought tolerant when mature.
Fertilizing: Fertilizer is rarely needed in average garden soils.
Pruning: Cut back in early spring to encourage vigorous growth and flowering.
Spacing: Space plants 4′ – 6′ (ft) apart for airflow and mature spread.
Maintenance: Remove spent flower spikes if desired to encourage continued blooming.
Its rich dark blooms, graceful arching habit, and outstanding pollinator value make Black Knight Butterfly Bush a standout choice for adding bold summer color and wildlife activity to the landscape.
