Available from Notcutts is the Buddleia davidii Black Knight. The butterfly bush. Buddleia Black Knight is a hardy shrub with panicles of deep violet-violet flowers from July to October. The fragrant blooms attract butterflies into the garden. Deciduous. Ideal for garden borders & easy to grow. Please be aware that this plant is dispatched fresh from the nursery once a week on a Wednesday, for delivery on the Thursday. Please make sure your order is placed by 8am Tuesday to ensure you qualify for a Wednesday dispatch.