• 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

Darlingtonia californica

Californian pitcher plant

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
Californian pitcher plant

© � RHS

  • Other common names Californian pitcher plant
    Cobra flower

    Cobra lily

    see more
  • Genus Darlingtonia are carnivorous perennials with several pitcher-like leaves hooded at the top, and solitary, nodding flowers in spring

  • Family Sarraceniaceae / Sarraceniaceae

  • Species D. californica is a perennial to 40cm, forming a rosette of trumpet-shaped leaves with the red-veined top folded over to form a hood with a reddish appendage. Flowers 6cm across, bell-shaped, with narrow yellowish-green sepals surrounding heavily purple-veined petals

  • Plant range USA

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)
    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

    H3

Colour

Sunlight

  • Full Sun

  • Aspect South-facing or East-facing

  • Exposure Sheltered

Soil

  • Chalk

    Sand

  • Chalk

    Loam

  • MoistureMoist but well-drained

  • SoilSand, Loam

  • pHAcid, Neutral

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 Grow under glass in full light with shelter from hot sun. In winter keep moist, cool and well ventilated. Grow outdoors in moist but sharply drained acid soil in full sun. Irrigate with lime-free water

Propagation Propagate by seed

Suggested planting locations and garden types Patio & Container Plants

How to care

Pruning No pruning required

Pests May be attacked by scale insects, mealybugs, aphids and tortrix moth

Diseases Generally disease free

Advertise here