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Herbaceous Perennial

Chrysanthemum 'Cousin Joan' (21d)
  • RHS AGM

chrysanthemum 'Cousin Joan'

A compact, bushy, deciduous herbaceous perennial which is later flowering than other varieties. It produces dark green, lobed foliage and single, strongly fragranced, magenta-pink flowers with a paler pink inner ring and yellow centres during October and November

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Size
Ultimate height
0.5–1 metres
Time to ultimate height
1 year
Ultimate spread
0.1–0.5 metres
Growing conditions
Chalk
Clay
Loam
Sand
Moisture
Moist but well–drained, Well–drained
pH
Acid, Alkaline, Neutral
Colour & scent
StemFlowerFoliageFruit
Spring Green
Summer Green
Autumn Pink Yellow Green
Winter
Position
  • Full sun
Aspect

South–facing or West–facing or East–facing

Exposure
Sheltered
Hardiness
H4
Botanical details
Family
Asteraceae
Native to the UK
No
Foliage
Deciduous
Habit
Clump forming, Bushy
Genus

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

Name status

Unresolved

Horticultural Group
Single Korean chrysanthemums are perennials with lobed leaves and single flowerheads

How to grow

Cultivation

Grow in a cold frame in a loam-based potting compost and move into a warm glasshouse in early autumn. Provide bright filtered light with good ventilation and a minimum temperature of 10 °C. During the growing season water moderately and apply a balanced liquid fertiliser weekly. See chrysanthemum cultivation

Propagation

Propagate by rooting softwood cuttings in loam-less potting compost at 16 °C in spring

Suggested planting locations and garden types
  • City and courtyard gardens
  • Cottage and informal garden
  • Patio and container plants
  • Cut flowers
  • Flower borders and beds
Pruning

Pinch out growing tips and disbud as required

Pests

May be susceptible to leaf and bud eelworm, aphids, glasshouse whitefly, glasshouse red spider mite and capsid bug

Diseases

May be susceptible to glasshouse grey moulds, powdery mildews and chrysanthemum white rust

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