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Dahlia 'David Howard' (D) AGM

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© RHS 1995

Characteristics

Plant type

Bedding or Herbaceous Perennial

Habit

Columnar/Upright

Toxicity

All parts may cause severe discomfort if ingested and may irritate skin

Resilience

Hardiness

H3 (half hardy - unheated greenhouse/mild winter)

Colour

Flower

Bronze and Orange in Autumn and Summer

Foliage

Dark Bronze and Dark Green in Autumn, Spring and Summer

Size

Ultimate height

0.5-1 metres

Ultimate spread

0.1-0.5 metres

Time to ultimate height

1-2 years


Preferred common name

dahlia 'David Howard'

Family

Asteraceae


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

'David Howard' is a half-hardy herbaceous perennial to 75cm in height, with dark, bronze-tinged foliage and bronze-orange, double flowers to 10cm across

How to grow

Sunlight

  • Full sun

Aspect

  • South-facing or West-facing
  • Sheltered

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

Soil

  • Moist but well-drained
  • Acid, Neutral or Alkaline
  • Loam, Clay, Sand or Chalk

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

City/Courtyard Gardens, Cottage/Informal Garden, Flower borders and beds or Cut Flowers


How to care

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