• 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

Clematis × cartmanii hort. 'Joe' (Fo/m)

Clematis 'Joe'

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
Clematis 'Joe'

© � RHS 1999

  • Other common names Clematis 'Joe'

  • Genus Clematis can be deciduous or evergreen shrubs or herbaceous perennials, mostly climbing by twining leaf-stalks, and often with showy flowers. Some have attractive fluffy seed-heads in autumn

  • Family Ranunculaceae / Ranunculaceae

  • Species 'Joe' is a compact trailing or scrambling evergreen climber with divided, leathery, dark green leaves and clusters of bowl-shaped, white flowers 4cm across in early spring

  • Horticultural Group Forsteri Group clematis are dwarf spreading or prostrate evergreen shrubs, usually dioecious, with deeply cut, trifoliate leaves and small cream or white, sometimes fragrant, flowers

Characteristics

  • Foliage Evergreen

  • Habit Climbing

  • 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)
    Old hardiness ratings

    While we update our systems with the new hardiness ratings you may still see old hardiness ratings in your search results. These are denoted as 'Old'.

    • H1 - Requires heated glass
    • H2 - Requires unheated glass
    • H3 - Hardy outside in some regions of the UK
    • H4 - Hardy throughout the UK
    • H1 + H3 - Requires heated glass but may be grown outside in summer

    For full details of the hardiness ratings see

    see more

    H4

Colour

Sunlight

  • Full Sun

  • Partial Shade

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

  • Exposure Sheltered

Soil

  • Chalk

    Sand

  • Chalk

    Chalk

  • Chalk

    Loam

  • MoistureWell-drained

  • SoilSand, Chalk, Loam

  • pHAcid, Alkaline, Neutral

Size

  • Ultimate height

    1-1.5 metres

  • Ultimate spread

    0.1-0.5 metres

  • Time to ultimate height

    2-5 years

How to grow

Cultivation Prefers well-drained gritty soil in full sun or part shade with shelter. Plant with the crown 5?8cm (2?3in) deep to encourage shoots to grow from below ground level. Can be grown in a container in a cold greenhouse or conservtory

Propagation Propagate by semi-ripe cuttings or layering

Suggested planting locations and garden types Flower borders and beds Wall-side Borders City & Courtyard Gardens Cottage & Informal Garden Gravel Garden Patio & Container Plants

How to care

Pruning Pruning (clematis) group 1

Pests Aphids, slugs and snails may attack young growth

Diseases Generally disease free but clematis wilt or clematis slime flux can be occasional problems

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