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S. grandiflorum is a rather sprawling, hairy, deciduous perennial with mid-green leaves up to 25cm long. In late spring and early summer it bears one-sided sprays of hanging, tubular, cream flowers, opening from red-flushed buds
S. officinale is a robust, rather invasive perennial forming a clump of erect stems bearing elliptic leaves to 25cm in length, and terminal clusters of nodding, tubular bell-shaped, purple, pink or cream flowers 2cm in length in late spring and summer
S. tuberosum is a rhizomatous, clump-forming perennial, to 60cm tall and wide, with coarse, hairy, deeply-veined leaves and hairy stems. Small clusters of pale creamy-yellow, pendent flowers are borne in spring and summer
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The Royal Horticultural Society is the UK’s leading gardening charity. We aim to enrich everyone’s life through plants, and make the UK a greener and more beautiful place.