Eucalyptus aggregata

RHS Plant Profile

black gum

Trees

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An elegant, moderately fast growing evergreen tree, producing about 1-1.5m of new growth per year when established. Bark is deeply furrowed and brown or mid-grey. Long willow-like leaves are produced on branches that form an open, airy canopy. It is a useful subject for growing in boggy or dry soil conditions and reaches a mature height of 18m

Position

Full sun

Soil Types

Loam, Sand, Clay

Max Height

Higher than 12 metres

Max Spread

wider than 8 metres

Size

Time to Maturity: 10–20 years
Max Spread: wider than 8 metres
Max Height: Higher than 12 metres

Growing Conditions

Loam Sand Clay

Moisture: Poorly–drained or Well–drained
pH: Acid 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

Colour & Scent

Fragrance Foliage

Season	Stem	Flower	Foliage	Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family: Myrtaceae
Native to GB/Ireland: No
Foliage: Evergreen
Habit: Spreading branched
Genus: Eucalyptus are evergreen trees or large shrubs, often fast-growing, some with attractive bark, most with aromatic foliage, and clusters of small, white, yellow or red flowers
Name Status: Correct

How to Grow

Cultivation

Grow in fertile, well-drained, neutral to slightly acid soil, in full sun and sheltered from cold, drying winds. See eucalyptus cultivation

Propagation

Propagate by seed at 13-18°C in spring and summer

Suggested planting locations and garden types

Mediterranean climate plants
Architectural
Coastal
Cottage and informal garden
Hedging and screens

Pruning

Pruning group 1 or, for best juvenile foliage, pruning group 7 For more information see Eucalyptus: pruning

Pests

May be susceptible to eucalyptus gall wasp and eucalyptus sucker

Diseases

May be susceptible to silver leaf, oedema and honey fungus