• 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

Lachenalia vanzyliae

van Zyl opal flower

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
van Zyl opal flower

© RHS

  • Other common names van Zyl opal flower

  • Synonyms Lachenalia aloides var. vanzyliae

  • Family Asparagaceae

  • Genus Lachenalia are bulbous perennials with strap-shaped, sometimes dark-spotted leaves, and erect stems bearing racemes or spikes of tubular flowers, slightly fragrant in some species, in autumn, winter or early spring

  • Details L. vanzyliae is a bulbous perennial up to 25cm high, growing from autumn to spring, with long fleshy green leaves that are heavily-spotted above with maroon-brown. From late winter to early spring spikes of hanging tubular flowers, about 3cm long, appear. Flowers are pale grey-green-blue at the base and yellowish grey-green at the apex, and tipped and edged in grey

  • Plant range South Africa (Cape)

Characteristics

  • Foliage Deciduous

  • Habit Clump-forming

  • 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)

    H2

Colour

Sunlight

  • Full Sun

  • Aspect South-facing or West-facing

  • Exposure Sheltered

Soil

  • Loam

    Loam

  • Sand

    Sand

  • MoistureWell-drained

  • SoilLoam, Sand

  • pHNeutral, Acid

Size

  • Ultimate height 0.1-0.5 metres

  • Ultimate spread 0.1-0.5 metres

  • Time to ultimate height 2-5 years

How to grow

Cultivation Plant bulbs 10cm deep: in frost-prone areas, grow in a cool greenhouse or conservatory in full light in loam-based potting compost such as John Innes No. 2. Water moderately as growth starts, water freely when in full growth (adding a balanced fertilizer every fortnight), and reduce watering as the leaves fade, then keep dry until fresh growth starts. In frost-free areas with dry summers, grow in full sun in well-drained soil in a rock garden or among low shrubs

Propagation Propagate by seed, sown at 13-18ºC as soon as it is ripe, or by division, removing bulblets from dormant plants and repotting or replanting straightaway

Suggested planting locations and garden types Patio & Container Plants

How to care

Pruning No pruning required

Pests Generally pest free

Diseases Generally disease free

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