Buddleia davidii 'Nanho Blue' (properly known as Buddleia davidii "Mongo") is a dwarf butterfly bush, making an ideal choice for a smaller garden. Blue-purple cone shaped flowerheads, with an orange eye, and silvery-green triangular-ovate leaves on woody stems. It remains one of the most popular compact cultivars. Flowers July-September. Height 100-150cm. Supplied in a 3-4 litre pot.