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Trees

+ Laburnocytisus 'Adamii'

Adam's laburnum

A small spring-flowering deciduous tree with some branches bearing foliage and yellow flowers of common laburnum, others those of purple broom, and many intermediate dull yellowish-pink flowers

Synonyms

+ Laburnocytisus adamii

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Ultimate height

4–8 metres

Time to ultimate height

10–20 years

Ultimate spread

2.5–4 metres

Chalk

Clay

Loam

Sand

Moisture

Moist but well–drained

pH

Acid, Alkaline, Neutral

	Stem	Flower	Foliage	Fruit
Spring
Summer
Autumn
Winter

Full sun

Aspect

West–facing or South–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)

Botanical details

Family: Fabaceae
Native to GB / Ireland: No
Foliage: Deciduous
Habit: Bushy
Potentially harmful: Harmful if eaten. Wear gloves and other protective equipment when handling Pets (dogs): Harmful if eaten - see the HTA guide to potentially harmful plants for further information and useful contact numbers
Genus: + Laburnocytisus is a deciduous tree, a graft-hybrid between laburnum and purple broom, bearing flowers of each separately, also intermediate ones
Name status: Accepted

How to grow

Cultivation

Grow in moderately fertile, moist but well-drained soil in full sun

Propagation

Propagate by grafting onto laburnum seedlings in winter

Suggested planting locations and garden types

Cottage and informal garden
City and courtyard gardens
Wall side borders

Pruning

Pruning group 1; remove suckers

Pests

May be susceptible to broom gall mites

Diseases

May be susceptible to honey fungus

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