Butterfly Bush Nanho Blue A compact form of the classic Buddleia, bearing long, lilac blue, cone-shaped flower clusters throughout late Summer. The slender foliage is a grey-green colour. Relatively compact habit. Prune hard to control size, shape and encourage fresh flowering growth, best done in early Spring, but additional partial pruning can be done after flowering in autumn. Holds the RHS Award of Garden Merit. Site: Tolerates costal exposureSoil: Well drained soils, tolerates drought once establishedPosition: Full sunSeason of Interest: Blue flowers in late SummerHardiness: Fully hardyHeight: 5.5ft (1.8m) Spread: 5.5ft (1.8m)