Nitraria retusaSalt Tree

The Nitraria retusa, commonly known as the Salt Tree or Ghardaq, is a spiny, densely branched halophyte shrub of coastal sabkha and saline depressions across north Africa and Arabia. It carries small, thick, wedge-shaped fleshy leaves in clusters along rigid spiny branches, with small white flowers followed by juicy red berries.

It traps windblown sand around its base and builds low natural hummocks, which makes it an effective self-organising stabiliser on open saline coast. It is used for coastal sabkha restoration, sand trapping and native saline shrub mass.

Specifications

• Height1 to 2 metres, sometimes taller where it has built a sand hummock beneath itself
• Width1.5 to 3 metres
• Native toNorth Africa, the Arabian Peninsula and the Levant, on coastal sabkha and saline depressions
• FoliageSmall, thick, wedge-shaped fleshy grey-green leaves clustered along spiny branches; evergreen
• Growth rateModerate

Conditions

• SoilAccepts strongly saline, alkaline, sandy and silty soils; grows on ground that crusts with salt
• LightFull sun
• WaterVery low; strongly drought-tolerant and able to use saline groundwater
• ClimateThrives in hot arid coastal and inland saline regions and is fully adapted to Gulf conditions

Additional Features

• FormLow spiny mound that traps windblown sand and builds a natural hummock over time
• FlowersSmall white to cream flowers in loose clusters, followed by fruit
• FruitJuicy red berries, edible and taken heavily by birds and desert mammals
• UsesCoastal sabkha restoration, sand trapping and stabilisation, native saline shrub mass, boundary planting
• SpacingPlant 2 to 3 metres apart for a continuous stabilising stand
• Low MaintenanceRequires no routine care once established
• Pest ResistanceFree of significant pest and disease problems
• Salt ToleranceVery high, one of the defining shrubs of Gulf and Red Sea sabkha
• Drought ToleranceVery high, holding evergreen foliage on saline groundwater through the dry season
• Wildlife AttractionThe red berries are taken heavily by coastal birds and desert mammals through the fruiting season
• Erosion ControlActively traps windblown sand and builds hummocks that stabilise open saline ground

The Salt Tree does not simply survive on sabkha, it builds the ground it stands on, which is exactly what a coastal restoration scheme needs.