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BeddingHerbaceous Perennial

Dahlia 'Bishop of Llandaff' (P)
  • RHS AGM
  • RHS Plants for pollinators

dahlia 'Bishop of Llandaff'

'Bishop of Llandaff' is an herbaceous perennial to 1m in height, with deep blackish-red foliage and semi-double brilliant red flowers 6cm in width

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

West–facing or South–facing

Exposure
Sheltered
Hardiness
H3
Botanical details
Family
Asteraceae
Native to the UK
No
Foliage
Deciduous
Habit
Columnar upright
Potentially harmful
All parts may cause severe discomfort if ingested and may irritate skin. Wear gloves and other protective equipment when handling
Genus

Dahlia are tuberous rooted perennials with pinnately divided leaves and showy flowerheads, double in many cultivars, in summer and autumn

Name status

Accepted

How to grow

Cultivation

Grow in fertile, humus-rich, well-drained soil, enriched with organic matter and general purpose fertiliser, in full sun. Pinch out growing tips to encourage bushy plants and stake. Water freely in dry periods. Lift and store tubers in autumn to replant or use as a source of cuttings in spring

Propagation

Propagate by softwood cuttings taken in spring from shoots from stored tubers, or divide the tubers ensuring each division has a viable bud

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

Deadhead to prolong flowering. Cut back to near ground level in the autumn, before lifting and storing for the winter

Pests

Can get aphids, capsid bug, earwigs, caterpillars and glasshouse red spider mite

Diseases

May be affected by a virus, tubers may rot in store

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