Genista 'Porlock'

RHS Plant Profile

broom 'Porlock'

Other common names

broom 'Parlock'

Synonyms

Cytisus 'Porlock'

Shrubs

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A semi-evergreen, medium-sized shrub with small leaves and racemes of fragrant, bright yellow flowers appearing in spring

Position

Full sun

Soil Types

Chalk, Clay, Loam, Sand

Max Height

1.5-2.5 metres

Max Spread

1.5-2.5 metres

Size

Time to Maturity: 5–10 years
Max Spread: 1.5-2.5 metres
Max Height: 1.5-2.5 metres

Growing Conditions

Chalk Clay Loam Sand

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

Position

Full sun

Aspect: South–facing or East–facing or North–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): H3
Drought Resistance: Yes

Colour & Scent

Fragrance Flower

Season	Stem	Flower	Foliage	Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family: Fabaceae
Native to GB/Ireland: No
Foliage: Semi evergreen
Habit: Bushy
Genus: Genista are deciduous, sometimes spiny, shrubs or small trees with small, simple or trifoliate leaves and solitary, racemose or clustered, pea-like yellow flowers which are sometimes fragrant
Name Status: Accepted

How to Grow

Cultivation

Grow in poor but well-drained soil in full sun

Propagation

Propagate by seed or semi-hardwood cuttings

Suggested planting locations and garden types

City and courtyard gardens
Cottage and informal garden
Gravel garden
Low Maintenance
Banks and slopes
Ground cover

Pruning

Pruning group 1. Will not tolerate hard pruning. New growth will not rejuvenate from old wood

Pests

May be susceptible to aphids and gall mites

Diseases

May be susceptible to honey fungus in gardens where it is present but insufficient data to determine degree of susceptibility