Description Salvia sagittata ‘Blue Butterflies’ A clump-forming perennial which has distinctly arrow-shaped, medium to dark green, slightly hairy leaves. From July to September, striking deep blue flowers are borne which are arranged in loose, airy spikes. Grow in light, moderately fertile, humus-rich, moist but well-drained soil in full sun or light dappled shade. It will reach a height of 60-90cm and a spread of 45-60cm.
