Proven Winners® Buddleja davidii 'SMNBDBT' (Rocketstar® Indigo) has large, indigo blue flowers. The plants from the Rocketstar® series look completely different to regular butterfly bushes. This hardy butterfly bush combines a very compact and low growth with exceptionally large flowers. The plant is continually covered in flowers from early summer to autumn. Protection under plant breeding legislation has been applied for. Valkplant submitted and also markets this plant.