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Eucalyptus grandis - Flooded Gum

About Your New Eucalyptus grandis - Flooded Gum

Eucalyptus grandis, the Flooded Gum or Rose Gum, is a tall straight trunked Australian native and one of the largest hardwoods of the east coast. Smooth powdery white bark sheds each year to reveal grey and pink undertones, with a short rough skirt of bark at the base. Long lance shaped leaves form a high open crown.

It wants full sun and deep fertile soil with reliable moisture, and grows naturally along creek flats and moist gullies. Growth is quick at roughly 0.8 to 1.2 metres a year. Coastal and near coastal districts from northern New South Wales to Queensland suit it. Young trees are cut by hard frost, so avoid cold inland sites.

Its scale limits it to large properties, farm forestry, parkland, wide road reserves, creek line revegetation and erosion control. The white flowers through late autumn and winter feed bees and nectar birds. On a big block where fast canopy and vertical presence matter more than anything else, few trees can match it.

Frequently Asked Questions

About Flooded Gum

What is a Flooded Gum?

Flooded Gum is Eucalyptus grandis, a very tall forest tree from the east coast of Australia, also called Rose Gum for the pink tone of its timber. It has a long straight trunk, smooth white bark that sheds annually and a high open crown. It is grown for timber, revegetation and large scale landscape planting.

How big does Eucalyptus grandis grow?

It reaches 30 to 50 metres tall in good conditions, with a canopy spreading roughly 15 to 25 metres. The trunk stays straight and clean for much of that height before the crown starts. This is not a tree for a suburban backyard. It needs open ground and distance from buildings, services and boundaries.

How fast does it grow?

About 0.8 to 1.2 metres a year, and faster again on deep moist soil, which puts it among the quicker eucalypts available. That speed is why it is used for plantation timber and rapid revegetation. Growth slows on dry or shallow ground, where the tree also fails to reach anything like its full height.

Where does it grow best in Australia?

Its natural range runs the coast and ranges from around Newcastle north through New South Wales into central and north Queensland, and that is where it performs. It wants a warm humid climate, deep fertile soil and reliable rainfall or a moist creek flat. It does poorly in dry inland conditions or on thin sandy ground.

Is it frost tolerant?

Only lightly, and less than its subtropical reputation suggests. Young trees are damaged or killed by heavy frost, and established trees are marked by severe cold. It is best treated as a species for frost free or light frost districts near the coast. For cold tableland sites choose a snow gum or a mountain species instead.

Does it have invasive roots?

It develops a large vigorous root system that actively seeks moisture, so keep it well away from house footings, septic systems, drains and paving. A minimum of 20 metres from any structure is a sensible starting point. In an open paddock, park or riparian setting this same root capacity is exactly what stabilises the soil.

How do I care for a Flooded Gum?

Water through the first two summers to get the roots down, and mulch widely without piling it against the trunk. Formative pruning in the first few years builds a single straight leader. After that it needs almost nothing beyond an occasional inspection for deadwood, which is worth doing on any tree of this size near access.

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Uses in my Garden

  • Shade Tree
  • Council or Civic Landscapes
  • Avenue Planting
  • Rural Property Planting
  • Revegetation or Regeneration

Eucalyptus grandis - Flooded Gum works in an:

  • Australian Native Garden – celebrates local plants with natural character.
  • Woodland Garden – layered, naturalistic design under dappled light.
  • Heritage / Traditional Garden – timeless, classic plantings for period homes.

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