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    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
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Kniphofia 'Samuel's Sensation' Samuel

red-hot poker 'Samuel's Sensation'

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
Sold by 8 nurseries

  • Other common names red-hot poker 'Samuel's Sensation'

  • Family Asphodelaceae

  • Genus Kniphofia may be evergreen or herbaceous perennials, with linear or strap-shaped leaves and erect stems bearing a dense raceme of tubular, usually pendent flowers

  • Details 'Samuel's Sensation' is a robust herbaceous perennial to 1.5m in height, forming a large clump of long, narrow leaves. In late summer and early autumn strong purplish stems bear spikes of scarlet flowers which become tinged with yellow as they age

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)

    H5

Colour

Sunlight

  • Full Sun

  • Aspect South-facing or East-facing

  • Exposure Exposed

Soil

  • Loam

    Loam

  • Sand

    Sand

  • MoistureMoist but well-drained

  • SoilLoam, Sand

  • pHAcid, Neutral

Size

  • Ultimate height 1-1.5 metres

  • Ultimate spread 0.5-1 metres

  • Time to ultimate height 2-5 years

How to grow

Cultivation Best grown in a sandy soil that has been enriched with humus but any deep, moist but well-drained soil will do. Full sun is best; can tolerate partial shade but flowering is reduced

Propagation Propagate by division of established clumps in late spring. Propagate by taking offshoots from the crown

Suggested planting locations and garden types Flower borders and beds City & Courtyard Gardens Cottage & Informal Garden Mediterranean Climate Plants

How to care

Pruning Old flower stems can be cut down after flowering

Pests May be attacked by thrips

Diseases May be subject to violet root rot

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