Betula utilis subsp. jacquemontii 'Trinity College'

RHS Plant Profile

Himalayan birch 'Trinity College'

Synonyms

Betula utilis 'Trinity College'
Betula utilis var. jacquemontii 'Trinity College'

Trees

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A relatively upright and medium sized deciduous birch to a height of up to 6m. Dark green leaves with serrated edges appear in the spring, turning to a buttery yellow colour in the autumn. Bright white bark shows at an earlier stage than other birches. The catkins are yellow brown and borne in spring

Position

Full sun, Partial shade

Soil Types

Loam, Clay, Chalk, Sand

Max Height

4-8 metres

Max Spread

2.5-4 metres

Size

Time to Maturity: 10–20 years
Max Spread: 2.5-4 metres
Max Height: 4-8 metres

Growing Conditions

Loam Clay Chalk Sand

Moisture: Moist but well–drained or Well–drained
pH: Neutral or Alkaline or Acid

Position

Full sun Partial shade

Aspect: West–facing or North–facing or South–facing or East–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): H7

Colour & Scent

Season	Stem	Flower	Foliage	Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family: Betulaceae
Native to GB/Ireland: No
Foliage: Deciduous
Habit: Spreading branched, Bushy
Genus: Betula can be deciduous trees or shrubs, usually colouring well in autumn and often with striking white, pink, or peeling brown bark; separate male and female catkins open before or with the leaves in spring
Name Status: Accepted

How to Grow

Cultivation

Will grow in a wide range of situations, including alklaline soil in sun or part-shade, but grows best in acid or neutral soil. See tree cultivation for further advice

Propagation

Propagate by softwood cuttings or grafting

Suggested planting locations and garden types

Cottage and informal garden
Wildlife gardens
Low Maintenance
Flower borders and beds

Pruning

Pruning group 1

Pests

May be susceptible to birch borers, leaf-mining sawflies and aphids

Diseases

May be susceptible to honey fungus, a tree rust and powdery mildews