“The handsomest of all the Himalayan shrubs” Sir Joseph Hooker. I’ve grown this, the largest flowered of all the Buddlejas for 20 or 30 years. It flowers quite easily on wood from the previous seasons growth. Besides dead heading it needs no attention and I don’t cut it back much at all. Needs summer water and good soil to flourish but worth any effort. 200cm x 150cm. Sun or light shade.