• 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

Disocactus ackermannii

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

© RHS

  • Family Cactaceae

  • Genus Disocactus are evergreen perennials with cylindrical main stems and flattened side shoots, bearing funnel-shaped, sometimes fragrant flowers on the margins, followed by fleshy white fruits

  • Details D. ackermannii is an erect, perennial epiphytic cactus with flat thin slightly scalloped, fleshy stems, rarely 3-ribbed. The crimson to scarlet, red funnel-shaped flowers to 12cm have contrasting yellow pollen and white stigma lobes

  • Plant range S Mexico

Characteristics

  • Foliage Evergreen

  • 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)

    H1C

Colour

Sunlight

  • Partial Shade

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

  • Exposure Sheltered

Soil

  • Sand

    Sand

  • Loam

    Loam

  • MoistureMoist but well-drained

  • SoilSand, Loam

  • pHAcid

Size

  • Ultimate height 0.1-0.5 metres

  • Ultimate spread 0.1-0.5 metres

  • Time to ultimate height 5-10 years

How to grow

Cultivation Under glass grow in acidic, moisture-retentive but sharply-draining compost, or a proprietary epiphytic cactus compost, in bright filtered light and moderate to low humidity. During the growing season water freely applying a balanced fertiliser for acid loving plants at half strength every two weeks from April to end September. Water only moderately and cease fertiliser applications during the winter. In frost free areas grow in hanging baskets or epiphytically in partial shade

Propagation Propagate by seed at 27°C as soon as ripe in acidic loamless compost. Softwood cuttings may be taken in late spring

Suggested planting locations and garden types Sub-tropical Patio & Container Plants

How to care

Pruning No pruning required

Pests Can be susceptible to scale insects and mealybugs under glass

Diseases Generally disease free, except where grown in poorly draining soils which can result in root rot

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