• 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 viridiflora

green-flowered Cape cowslip

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
green-flowered Cape cowslip

© RHS

  • Other common names green-flowered Cape cowslip

  • 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. viridiflora is a bulbous perennial to 20cm tall, with two strap-shaped pale green leaves, and spikes of vivid blue-green or turquoise flowers tipped with white in winter

  • Plant range S Africa (W Cape)

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)

    H2

Colour

Sunlight

  • Full Sun

  • Aspect South-facing or West-facing

  • Exposure Sheltered

Soil

  • Sand

    Sand

  • Loam

    Loam

  • MoistureWell-drained

  • SoilSand, Loam

  • pHNeutral

Size

  • Ultimate height 0.1-0.5 metres

  • Ultimate spread 0-0.1 metre

  • Time to ultimate height 2-5 years

How to grow

Cultivation Overwinter under glass. In containers grow in loan-based compost such as John Innes No.2 in full light. Water moderately until in full growth, than water freely, adding a balanced fertiliser every 10-14 days. Reduce watering as the leaves fade, than keep dry until the onset of new growth in the autumn

Propagation Propagate by seed as soon as ripe, germinate at 13-18°C. Remove bulblets in summer or autumn when dormant before re-potting. Further bulb propagation advice

Suggested planting locations and garden types Patio & Container Plants

How to care

Pruning Remove dead foliage

Pests Aphids, slugs and snails may be a problem

Diseases Generally trouble free

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