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BeddingHerbaceous Perennial

Chrysanthemum 'Susan's Bonnet' (29a)
  • RHS Plants for pollinators

chrysanthemum 'Susan's Bonnet'

'Susan's Bonnet' is an upright perennial with flowers 9cm across, the outer florets light lemon-yellow, speckled coral pink, the inner florets deeper lemon yellow tipped red

Size
Ultimate height
0.5–1 metres
Time to ultimate height
1–2 years
Ultimate spread
0.1–0.5 metres
Growing conditions
Clay
Loam
Sand
Moisture
Moist but well–drained
pH
Acid, Alkaline, Neutral
Colour & scent
StemFlowerFoliageFruit
Spring Green
Summer Red Yellow Green
Autumn Red Yellow Green
Winter
Position
  • Full sun
Aspect

South–facing or East–facing

Exposure
Sheltered
Hardiness
H3
Botanical details
Family
Asteraceae
Native to the UK
No
Foliage
Deciduous
Habit
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

Accepted

Horticultural Group
Anemone-flowered, early flowering Outdoor Spray chrysanthemums are upright perennials with branched stems each bearing several flowerheads with a central boss of short florets, surrounded by larger outer florets

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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 to encourage 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
  • Cottage and informal garden
  • Cut flowers
  • Flower borders and beds
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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