• AGM plants

    AGM plants have been through a rigourous 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

Vinca difformis

Intermediate periwinkle

Intermediate periwinkle

© � Mike L. Grant 2002

  • Other common names Intermediate periwinkle

  • Genus Vinca can be evergreen subshrubs or herbaceous perennials, with simple, paired leaves and solitary, 5-lobed, salver-shaped flowers in the leaf axils

  • Family Apocynaceae / Apocynaceae

  • Species V. difformis is a vigorous, prostrate evergreen sub-shrub with rooting stems bearing ovate, evergreen leaves, and short upright leafy stems with pale whitish-blue flowers 4cm across, in late winter and early spring

  • Plant range N Africa & SW Europe

Characteristics

  • Foliage Evergreen

  • Habit Mat forming

  • Toxicity

Colour

Sunlight

  • Full Sun

  • Full Shade

  • Partial Shade

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

  • Exposure Sheltered or Exposed

Soil

  • Chalk

    Chalk

  • Chalk

    Clay

  • Chalk

    Sand

  • Chalk

    Loam

  • MoistureWell-drained, Moist but well-drained, Poorly-drained

  • SoilChalk, Clay, Sand, Loam

  • pHAcid, Alkaline, Neutral

Size

  • Ultimate height

    0.1-0.5 metres

  • Ultimate spread

    1-1.5 metres

  • Time to ultimate height

    5-10 years

How to grow

Cultivation Easy to grow in all but the driest soils. Flowers best in full sun but very useful for shady areas. Can be invasive

Propagation Propagate by division in spring or autumn and by semi-hardwood cuttings in summer

Suggested planting locations and garden types Ground Cover Rock Garden

How to care

Pruning Pruning group 6

Pests Can get aphids

Diseases May be subject to a rust

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