Penstemon 'Sour Grapes' M. Fish Overview
Penstemon 'Sour Grapes' is a hardy perennial that produces tall spikes of showy tubular or open trumpet-shaped purple-blue flowers with a white throat, throughout summer. It has large, glossy, deep green leaves. It likes a position in full sun or partial shade and fertile, well-drained soil. Suitable for many garden situations, it is usually seen in the mixed flower borders of cottage-style - and other informal - gardens. In colder areas, Penstemon 'Sour Grapes' will benefit from a dry mulch before the winter. Cut back old stems in spring. Keep well watered until new plants are established. 'Sour Grapes' was introduced in the 1950s by Margery Fish at East Lambrook Manor in Somerset. This cultivar has earned a Royal Horticultural Society (RHS) Award of Garden Merit. It is on the RHS 'Plants for Pollinators' list highlighting plants that produce large amounts of nectar and/or pollen. A great choice for encouraging beneficial insect wildlife into your garden! (The paler coloured cultivar 'Stapleford Gem' is very similar and is occasionally sold as Penstemon 'Sour Grapes').