Buddleja davidii 'Black Knight' AGM
One of the best with exceptionally dark purple almost black long flower FRAGRANT flower spikes in from summer into autumn attracting numerous butterflies and other insects. Silver-grey foliage. Deciduous. Best pruned regularly to stop it getting unruly. Approx. 3m x 5m. Prune in spring if required. Fertile, reasonably well-drained soil in full sun.