Cytisus × boskoopii 'Boskoop Ruby'

RHS Plant Profile

broom 'Boskoop Ruby'

Synonyms

Cytisus × beanii 'Boskoop Ruby'
Cytisus 'Boskoop Ruby'

Shrubs

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A compact, bushy deciduous shrub with a rounded habit and small, oval shaped green foliage. Masses of dark, crimson-red flowers appear on upright shoots in late spring and early summer

Position

Full sun

Soil Types

Chalk, Loam, Sand

Max Height

1-1.5 metres

Max Spread

1-1.5 metres

Size

Time to Maturity: 5–10 years
Max Spread: 1-1.5 metres
Max Height: 1-1.5 metres

Growing Conditions

Chalk Loam Sand

Moisture: Well–drained
pH: Acid or Alkaline or Neutral

Position

Full sun

Aspect: South–facing or West–facing
Exposure: Exposed or Sheltered
Hardiness

Hardiness Ratings

All ratings refer to the UK growing conditions unless otherwise stated. Minimum temperature ranges (in degrees C) are shown in brackets

H1A: under glass all year (>15C)
H1B: can be grown outside in the summer (10 - 15)
H1C: can be grown outside in the summer (5 - 10)
H2: tolerant of low temperatures, but not surviving being frozen (1 to 5)
H3: hardy in coastal and relatively mild parts of the UK (-5 to 1)
H4: hardy through most of the UK (-10 to -5)
H5: hardy in most places throughout the UK even in severe winters (-15 to -10)
H6: hardy in all of UK and northern Europe (-20 to -15)
H7: hardy in the severest European continental climates (< -20): H5
Drought Resistance: Yes

Colour & Scent

Season	Stem	Flower	Foliage	Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family: Fabaceae
Native to GB/Ireland: No
Foliage: Deciduous
Habit: Bushy
Potentially harmful: Humans/Pets (dogs): Harmful if eaten. Wear gloves and other protective equipment when handling. For further information and contact numbers regarding pets, see the HTA guide to potentially harmful plants
Genus: 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
Name Status: Accepted

How to Grow

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

Propagation

Propagate by semi-ripe cuttings in late summer or early autumn and hardwood cuttings in midwinter

Suggested planting locations and garden types

Coastal
Cottage and informal garden
Gravel garden
Flower borders and beds

Pruning

Pruning group 3 but do not cut into old wood

Pests

May be susceptible to broom gall mites

Diseases

May be susceptible to honey fungus