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Cytisus × boskoopii 'Boskoop Ruby' AGM

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© RHS

Characteristics

Plant type

Shrub

Habit

Bushy

Toxicity

All parts, especially the seeds, may cause mild stomach upset if ingested

Resilience

Hardiness

H5 (hardy - cold winter)

Colour

Flower

Red in Spring and Summer

Foliage

Green in Autumn, Spring and Summer

Size

Ultimate height

1-1.5 metres

Ultimate spread

1-1.5 metres

Time to ultimate height

5-10 years


Preferred common name

broom 'Boskoop Ruby'

Family

Papilionaceae


Cytisus can be deciduous or evergreen shrubs, ranging from prostrate to erect and almost tree-like, with small, simple or 3-parted leaves and pea-like flowers spring or summer

'Boskoop Ruby' is a small deciduous shrub of rounded habit with abundant, deep crimson flowers on upright shoots in late spring and early summer

Synonym(s)

  • Cytisus 'Boskoop Ruby'

How to grow

Sunlight

  • Full sun

Aspect

  • South-facing or West-facing
  • Exposed or Sheltered

Cultivation

Best grown in well-drained poor acid soils in full sun. Tolerant of lime but may become chlorotic on shallow chalk soils. Plant when small, brooms resent transplanting

Soil

  • Well-drained
  • Acid, Alkaline or Neutral
  • Sand, Loam or Chalk

Propagation

Semi-ripe cuttings in late summer or early autumn and hardwood cuttings in midwinter

Suggested planting locations and garden types

Coastal, Cottage/Informal Garden, Flower borders and beds, Drought Resistant or Gravel Garden


How to care

Pruning

Pruning group 1 or pruning group 3 but do not cut into old wood

Pests

Broom gall mites may be a problem

Diseases

May be affected by honey fungus and waterlogging