• 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

Chrysanthemum 'Nora Brook' (25b)

chrysanthemum 'Nora Brook'

© RHS 1999
  • Other common names chrysanthemum 'Nora Brook'

  • Family Asteraceae

  • Genus Chrysanthemum are erect woody-based perennials with aromatic, pinnately lobed leaves and flowerheads of diverse form, from late summer to late autumn

  • Horticultural Group Medium-flowered, Early Flowering Outdoor Intermediate chrysanthemums bear fully double flowerheads in late summer and early autumn

  • Details 'Nora Brook' is a half-hardy perennial to 85cm tall, with divided foliage and light yellow flowers 13cm across, streaked with deep yellow and pale yellow on the reverse


  • 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)




  • Full Sun

  • Aspect South-facing or West-facing

  • Exposure Sheltered


  • Sand


  • Clay


  • Loam


  • Chalk


  • MoistureMoist but well-drained

  • SoilSand, Clay, Loam, Chalk

  • pHAcid, Alkaline, Neutral


  • Ultimate height 0.5-1 metres

  • Ultimate spread 0.5-1 metres

  • Time to ultimate height 1-2 years

How to grow

Cultivation Grow in a sheltered site in full sun in fertile well-drained soil, enriched with organic matter and general purpose fertiliser. Water freely in dry weather. Pinching out the growing tip when the plants are 15-20cm tall encourages free flowering bushy plants. Staking is usually required. There is no need to deadhead. In mild areas leave in the ground protected by a thick mulch. Elsewhere lift the crowns and store in a greenhouse, raising fresh plants from these each year

Propagation Propagate by softwood cuttings taken in spring from shoots from stored stools

Suggested planting locations and garden types Banks and Slopes Flower borders and beds City & Courtyard Gardens Coastal Cottage & Informal Garden Patio & Container Plants

How to care

Pruning Cut back to near ground level in the autumn, before lifting and storing for the winter

Pests Aphids and leaf miners are common pests. Leaf and bud eelworms can damage stock that has not been heat-treated. Earwigs sometimes damage blooms. Capsid bug and glasshouse red spider mite are occasional pests

Diseases Chrysanthemum white rust, can be very damaging and hard to control. Powdery mildews can be damaging in dry conditions. In wet weather grey moulds and other fungal rots can be severe. A virus may cause stunting and leaf markings

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