Black Knight
Buddleia davidii 'Black Knight'
Black Knight blooms from June through September.
Mature size, hardiness zones, sun and the trait tags were checked against named botanical sources for this plant. The bloom months and water need on this page were not.
Growing Black Knight
Plant it in full sun. It prefers low water. It is hardy in USDA zones 5–9. Expect it to reach about 6.6 ft tall and 5.9 ft wide at maturity, in roughly 3 years.
When to plant Black Knight
Plant Black Knight in early spring as soon as the soil is workable, or in early fall at least six weeks before your first frost, so roots establish in cool weather. For the middle of its hardy zones 5 to 9 range, spring means March to May and fall means September or October. Once settled, it blooms from June to September.
Month-by-month timing for your zone is on the planting calendar: for the middle of its range, start with zone 7 in March.
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Drop this plant onto a 3D plan, see how it fills in, and watch your whole garden bloom across the year.