• Penstemon &
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Penstemon 'Sour Grapes' (M. Fish)

Penstemon

£6.99
£6.99
Penstemon 'Sour Grapes' is a striking, semi-evergreen perennial that produces an abundance of purple-blue, trumpet-shaped flowers, providing a bold splash of colour from summer to autumn.
  • Unique purple-blue flowers
  • Pollinator-friendly
  • Low maintenance
Size

    • Aspect

      Full sun to partial shade

    • Hardiness

      Half hardy

    • Flowers

      July to October

    • Soil type

      Well-drained, Loamy, Sandy

    Penstemon &

    • Why we like this plant

      Penstemon 'Sour Grapes' is perfect for gardeners who want a long-lasting display of vibrant colour with minimal maintenance. Its eye-catching flowers provide valuable nectar for pollinators, making it a fantastic choice for wildlife-friendly gardens.

    • About this plant

      Known for its distinctive purple-blue flowers with a pale, almost white throat, Penstemon 'Sour Grapes' is a stunning addition to any garden. Its tall, upright stems bear numerous bell-shaped blooms, which are highly attractive to bees and butterflies. The foliage remains semi-evergreen in mild climates, adding year-round interest. With its long flowering period and easy-care nature, this variety is an excellent choice for borders, cottage gardens, and pollinator-friendly planting schemes.

    • Key features

      • Unusual purple-blue flowers with pale throats
      • Long flowering period from summer to autumn
      • Attracts bees and butterflies
      • Hardy and semi-evergreen in mild climates
      • Perfect for mixed borders and cottage gardens

    • Height and
      spread

    • Growth
      habit

      Upright, bushy

    • Moisture

      Moderate; drought-tolerant once established

    • Position in
      the Garden

      Mixed borders, cottage gardens, wildlife-friendly areas

    Planting guide

    • Plant in well-drained, fertile soil in full sun or partial shade
    • Space plants 30–45 cm apart to allow air circulation
    • Water well after planting and during dry spells
    • Incorporate organic matter into the soil to improve fertility

    Care tips

    • Deadhead regularly to prolong flowering
    • Cut back lightly in early spring to encourage fresh growth
    • Feed with a balanced fertiliser in spring for best results
    • Ensure well-drained soil to prevent root rot
    • Protect young plants from slugs and snails

    Winter care

    • Mulch around the base in colder regions for frost protection
    • Avoid heavy pruning before winter; leave stems for added protection
    • Ensure good drainage to prevent waterlogging