Swamp mahogany

Eucalyptus robustaMyrtaceaeTree

A coastal eastern Australian eucalypt of swampy ground that flowers in the middle of winter, and one of the most important winter nectar sources on the New South Wales coast — for bees, and for the flying foxes and honeyeaters that depend on it.

Value to bees

Nectar
Very high
Pollen
High
As a honey crop
Major honey crop — yields a surplus in good years
Which bees, and why
Large brush flowers holding a great deal of exposed nectar, worked by honey bees by day and by flying foxes and gliders at night. Coastal swamp forest loss has made the remaining stands disproportionately important.
Worth knowing
A keystone winter nectar source for the whole east coast fauna, and a substantial commercial honey flow alongside that.

Flowering

In flower
May to August (southern hemisphere)

Mid-winter flowering, which makes it a keystone resource on the Australian east coast.

When nectar flows
Very heavy. The flowers are large and produce copious nectar at a season when almost nothing else does.

What it does to the honey

Gives a dark amber honey with a strong malty body, a resinous edge and a lingering slightly bitter finish.

Growing it

Conditions
Wet, poorly drained coastal soil, and it tolerates brackish conditions.
Size
20-30 m.
Native range
Coastal eastern Australia from southern Queensland to southern New South Wales, on swampy and estuarine ground.
Suits
Large gardens, Farm scale
  • One of the few large eucalypts that thrives in permanently wet ground.
  • Coastal swamp forest is a much-reduced habitat, and planting for it is a genuine conservation contribution in eastern Australia.

What it looks like

A solid tree with thick reddish-brown spongy fibrous bark, broad glossy dark leaves and large clusters of substantial cream stamen-brush flowers.

Sources

  • HoneyHQ editorial synthesisHEKNO Ltd · HoneyHQ synthesis

How sources are selected and weighted is set out in the sources and evidence policy.

Guides covering this plant

Tools for planning planting

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