Penstemon may be deciduous or evergreen perennials or subshrubs, with simple, narrow leaves and racemes or panicles of bell-shaped or funnel-shaped flowers in summer and early autumn
‘Andenken an Friedrich Hahn’ is a bushy semi-evergreen perennial to 90cm in height, with narrow, dark foliage and erect racemes of tubular bell-shaped, deep wine-red flowers 3cm in length, marked white in the throat Elegant spikes of small, tubular, foxglove-like flowers appear from July to October among lance-shaped, bright green leaves. This vibrant, easy-to-grow perennial commemorates an 18th century German astronomer. It will quickly form large, leafy clumps and is perfect for adding a splash of colour to the middle of a sunny, well-drained border. The sumptuous, deep wine-red flowers,
Position: full sun or partial shade
Soil: fertile, well-drained soil
Rate of growth: fast-growing
Flowering period: July to October
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