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Penstemon ‘Sour Grapes’ (Beardtongue). In mid summer to early autumn, this large-leaved perennial has spikes of large, bell-shaped, grey-blue flowers tinged with purple and green.
They will thrive in fertile, well-drained soil with full sun. Cut back hard after flowering.
Rock garden, cutting bed, border, flower arranging Suitable for coastal conditions.
Italics = data drawn from parent genus or speciesView Full Plant Finder Record