• AGM plants

    AGM plants have been through a rigorous trial and assessment programme. They are:

    • Excellent for ordinary use in appropriate conditions
    • Available to buy
    • Of good constitution
    • Essentially stable in form & colour
    • Reasonably resistant to pests & diseases

Geranium × magnificum 'Rosemoor'

purple cranesbill 'Rosemoor'

  • Other common names purple cranesbill 'Rosemoor'

  • Family Geraniaceae

  • Genus Geranium can be annuals, biennials and perennials, herbaceous or evergreen, with rounded, usually palmately lobed or divided leaves, and lax inflorescences of rounded, 5-petalled flowers

  • Details 'Rosemoor' is a clump-forming perennial, growing to 60cm tall and 45cm wide. The deeply-divided, hairy, lobed, green leaves turn attractive shades of orange and red in autumn. In summer, saucer-shaped violet-blue flowers, with prominent veins on the petals, are borne in dense clusters and may be followed by a second flush

Characteristics

  • Foliage Deciduous

  • Habit Bushy

  • Hardiness

    Hardiness ratings

    All ratings refer to the UK growing conditions unless otherwise stated. Minimum temperature ranges (in degrees C) are shown in brackets

    • H1a - Under glass all year (>15C)
    • H1b - Can be grown outside in the summer (10 - 15)
    • H1c - Can be grown outside in the summer (5 - 10)
    • H2 - Tolerant of low temperatures, but not surviving being frozen (1 to 5)
    • H3 - Hardy in coastal and relatively mild parts of the UK (-5 to 1)
    • H4 - Hardy through most of the UK (-10 to -5)
    • H5 - Hardy in most places throughout the UK even in severe winters (-15 to -10)
    • H6 - Hardy in all of UK and northern Europe (-20 to -15)
    • H7 - Hardy in the severest European continental climates (< -20)

    H7

Colour

Sunlight

  • Full Sun

  • Partial Shade

  • Aspect East-facing or South-facing or West-facing

  • Exposure Exposed or Sheltered

Soil

  • Sand

    Sand

  • Clay

    Clay

  • Chalk

    Chalk

  • Loam

    Loam

  • MoistureWell-drained, Moist but well-drained

  • SoilSand, Clay, Chalk, Loam

  • pHAcid, Alkaline, Neutral

Size

  • Ultimate height 0.5-1 metres

  • Ultimate spread 0.1-0.5 metres

  • Time to ultimate height 2-5 years

How to grow

Cultivation Grows best in moderately fertile, well-drained soil in full sun or partial shade, but most soils (unless waterlogged) in either sun or shade are tolerated

Propagation Propagate by division between early autumn and early spring or cut back plants after flowering in summer, then divide, replant and water well

Suggested planting locations and garden types Garden Edging Underplanting of Roses and Shrubs Flower borders and beds Ground Cover Cottage & Informal Garden Gravel Garden

How to care

Pruning Remove flowered stems and old leaves to encourage the production of fresh leaves and flowers. New foliage quickly appears if cut down after flowering

Pests May be damaged by vine weevil larvae, Geranium sawfly larvae, capsid bug, slugs and snails

Diseases Downy mildews and a virus are occasional problems. Powdery mildews may be troublesome in dry conditions

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