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BeddingHerbaceous PerennialSynonym

Dendranthema 'Pennine Calypso'
  • RHS Plants for pollinators

chrysanthemum 'Pennine Calypso'

'Pennine Calypso' is a half-hardy perennial to 1m in height, with lobed leaves and flowers to 7.5cm in width, bright yellow, with a slight bronze tinge, lighter reverse and deep yellow disk

Synonyms
Dendranthema 'Pennine Calypso'
Size
Ultimate height
0.5–1 metres
Time to ultimate height
1–2 years
Ultimate spread
0.1–0.5 metres
Growing conditions
Chalk
Sand
Clay
Moisture
Moist but well–drained
pH
Acid, Alkaline, Neutral
Colour & scent
StemFlowerFoliageFruit
Spring Green
Summer Bronze Yellow Green
Autumn Bronze 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
Potentially harmful
Skin allergen. Wear gloves and other protective equipment when handling
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
Pompon-flowered, Early flowering Outdoor Spray chrysanthemums are compact plants with sprays of small, spherical flowerheads with tubular florets in early autumn

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

May be susceptible to aphids and leaf miners which 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

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

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