Warburgia salutaris Conservation and Sustainable Cultivation Initiative
The Warburgia salutaris (Pepperbark Tree) is Africa’s most commercially traded medicinal tree. Valued for its powerful antibacterial and antifungal properties in both traditional African and Western medicine, it has been scientifically proven to deliver these benefits.
A Species on the Brink
Overharvested for decades, Warburgia was listed as endangered as early as 1927. By the time it reached the IUCN Red List as “Endangered”, only 952 wild trees remained in South Africa, most inside Kruger National Park under armed protection. Many had already been severely debarked or destroyed.
From Poaching to Propagation
In response to intense poaching pressure during the rhino crisis, Sappi and Kruger National Park launched a cultivation project. In 2014, Sappi’s Shaw Research Centre began propagation trials using cuttings from KNP and existing groves. After years of refinement, they achieved a 77% success rate.
Saplings were grown in the KNP nursery for 12–18 months before being distributed to communities bordering the Park. The key challenge was teaching sustainable harvesting. Research showed that the active medicinal compounds are highly concentrated in the leaves and twigs, allowing trees to be harvested without destruction.
By 2022, 79,000 Warburgia trees had been planted in border communities with an 83% survival rate.
Our Organisation’s Role
We joined the initiative in 2019, initially donating growing bags and medium. We established nurseries in KwaZulu-Natal, partnered with Ezemvelo KZN Wildlife, and collaborated with government agencies to expand distribution.
Despite restrictions under the Threatened or Protected Species (TOPS) Act, we support communities through workshops on sustainable harvesting and have developed training manuals to ensure long-term success.
Real Community Benefits
One mature tree can generate R1,000 per year in medicinal sales after 4–5 years. A village with 2,500 trees could earn R250,000 annually. This economic incentive has led to strong protection of the trees. Over 42,000 trees have been distributed in KwaZulu-Natal alone.
Thanks to this project, Warburgia salutaris has improved from Endangered to Vulnerable (C) status.
A Message for World Biodiversity Day
The Warburgia story proves that combining science, community involvement, and economic incentives can save endangered species. By growing trees instead of just protecting them, we create solutions that benefit both biodiversity and local livelihoods.
Together, we can grow a greener, healthier future for South Africa’s precious medicinal flora.
Happy World Biodiversity Day!
