Vachellia sieberiana (Acacia sieberiana)Paperbark Thorn

The Vachellia sieberiana, commonly known as the Paperbark Thorn and listed as Acacia sieberiana in Gulf tender documents, is a broad, flat-crowned African thorn tree with corky, flaking, pale yellow-brown bark. It carries fine bipinnate foliage on a wide horizontal frame, long straight white spines, and creamy white flowerheads in spring.

The wide crown on a clean trunk makes it one of the best true shade trees among the African acacias, and the thick corky bark gives it more fire and drought resilience than most. It is used for park shade, open avenue work and large-scale native-character planting.

Specifications

• Height10 to 17 metres
• Width10 to 15 metres
• Native toSub-Saharan Africa, from Senegal and Sudan south through east Africa to South Africa
• FoliageFine, feathery bipinnate leaves in soft green; deciduous in the dry or cool season
• Growth rateModerate

Conditions

• SoilPrefers deep, well-drained sandy or loamy soils; tolerates poor and alkaline ground once established
• LightFull sun
• WaterLow to moderate; drought-tolerant once established, with better canopy density where water is available
• ClimateThrives in warm arid, semi-arid and subtropical regions and handles Gulf summer heat

Additional Features

• FormBroad, flat to umbrella-shaped crown carried on a clean trunk, giving genuine usable shade
• BarkThick, corky, flaking pale yellow-brown bark that gives the species its common name
• FlowersCreamy white globular flowerheads, lightly scented, in spring
• UsesPark and picnic shade, open avenue planting, large-scale native-character landscapes, livestock shade
• SpacingPlant 10 to 15 metres apart so the flat crown can develop to its full width
• Low MaintenanceNeeds only formative pruning to establish a clear trunk; no routine intervention thereafter
• Pest ResistanceGenerally robust in dry climates; stressed stems can attract borers
• Drought ToleranceDeeply drought-tolerant once rooted, dropping foliage rather than dying back in extended dry spells
• Wildlife AttractionFlowers carry nectar for bees and the open crown is used for nesting
• LongevityLong-lived, holding structure for decades in the right soil

The Paperbark Thorn is the African acacia to choose where the brief is real shade over a wide area rather than a narrow street form.