Ulmus 'Sapporo Autumn Gold'

RHS Plant Profile

elm 'Sapporo Autumn Gold'

RHS

Synonyms

Ulmus pumila 'Sapporo Autumn Gold'

Trees

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A fast-growing, broadly conical tree with upright branches. Oval, toothed, smooth, glossy, dark green leaves to 8cm long, are red tinged when young and yellow green in autumn. Flowers rarely produced. A hybrid between Japanese and Siberian elms (U. davidiana var. japonica and U. pumila)

Position

Full sun, Partial shade

Soil Types

Clay, Loam, Sand

Max Height

Higher than 12 metres

Max Spread

wider than 8 metres

Size

Time to Maturity: more than 50 years
Max Spread: wider than 8 metres
Max Height: Higher than 12 metres

Growing Conditions

Clay Loam Sand

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

Position

Full sun Partial shade

Aspect: West–facing or East–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): H6

Colour & Scent

Season	Stem	Flower	Foliage	Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family: Ulmaceae
Native to GB/Ireland: No
Foliage: Deciduous
Habit: Bushy
Genus: Ulmus are deciduous trees, often large, with elliptic or ovate leaves often colouring well in autumn; inconspicuous flowers are followed by winged fruits
Name Status: Accepted

How to Grow

Cultivation

Grow in any well-drained soil in full sun or partial shade

Propagation

Propagate by greenwood cuttings in summer

Suggested planting locations and garden types

Cottage and informal garden
Low Maintenance

Pruning

Pruning group 1

Pests

May be susceptible to aphids, bark beetles, horse chestnut scale and elm gall mites

Diseases

May be susceptible to Dutch elm disease (partially resistant), coral spot, honey fungus and phytophthora