This plant is sold as 'Silver Anniversary' though the more correct name seems to be 'Morning Mist'. It is a cross between Buddleja crispa and Buddleja loricata, raised in 1994. It is a rounded, compact-growing shrub to about 1.5 m in height. It has attractive woolly, silvery foliage and tiny, honey-scented flowers packed in short, clustered panicles during summer and autumn. The plant grows well in most soils and enjoys a full-sun position. It is best to prune it hard in late winter. It is quite drought tolerant once established, and fairly frost hardy. Unlike other Buddleja, it apparently doesn't set seed.
Postscript: I eventually removed this plant from my garden but I still think it is a good little shrub.