HoneyHQ

Sweet thorn

Vachellia karrooFabaceaeTree

The most widespread thorn tree in southern Africa and one of its most important honey plants. It flowers after the first summer rains in a burst of golden balls, and the honey it yields is a staple of South African, Zimbabwean and Namibian beekeeping.

Where not to plant it

Encroaches heavily on southern African grassland where grazing management has broken down, thickening into scrub that reduces both grazing capacity and grassland biodiversity.

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
Worked hard by the African honey bee and the Cape honey bee, both of which respond quickly to a rain-triggered flow in a way a European colony on a fixed calendar would not.
Worth knowing
A major southern African honey crop and, in many districts, the single most important source there is.

Flowering

In flower
November to February (southern hemisphere)

Flowering follows the first substantial summer rains and can be triggered more than once in a wet season.

When nectar flows
Generous and heavily scented, and a stand in flower is one of the more conspicuous events of the southern African bee year.
Year-to-year variation
Rain-triggered and therefore unpredictable in timing. A late rainy season delays the flow rather than removing it.

What it does to the honey

Gives a light amber honey with a soft floral sweetness, a faint almond note from the flower's own scent, and a clean finish.

Growing it

Conditions
Full sun on almost any soil, tolerating drought, frost, seasonal waterlogging and salinity — the range breadth is the species' defining feature.
Size
5-12 m.
Native range
Southern Africa from Angola and Zambia south through Zimbabwe, Botswana, Namibia and South Africa, across a wider range of habitats than any other African acacia.
Suits
Large gardens, Farm scale
  • Widely used in southern Africa for shade, fodder, firewood and hedging.
  • Where grazing pressure is heavy, it is an encroachment problem rather than an asset.

What it looks like

A rounded thorn tree with long paired white spines, fine bipinnate foliage and dense bright yellow flower balls smelling strongly of sweet almond. Amber gum weeps from wounds in the bark.

Sources

  • HoneyHQ editorial synthesis — HEKNO Ltd · HoneyHQ synthesis

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

Tools for planning planting

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