Penstemon - 'Sour Grapes' Type Herbaceous flower, Deciduous, Flowering Form Ground-Hugging Rounded Clump Size Medium Border Plant (50-180cm height) Colours Violet Flowers (Summer late), Green Foliage Care Regular Maintenance Required Hardiness Frost Tender Growth Medium Growing Plant Earmark this plant   Penstemon cultivation notes: Penstemon prefers a sunny sheltered location. This perennial is not fully hardy so avoid cold areas. Phlox flourishes on humus rich sandy soil soils. Cut stems after flowers fade. Cut back hard in Autumn / divide every 3-4 years. Mulch in autumn. Plant Strengths: Suitable for container growing. Plant Weaknesses: Does not tolerate very dry or very wet soils.

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