Conserving critically endangered species may involve translocation, assisted migration, introduction, or reintroduction to suitable sites. The African Black Walnut faces extinction in Benin, because of the small size of its population and the habitat degradation from agriculture, forest fires, and logging. Our solution has focused on seed germination, seedling growth, and introduction into protected forest ecosystems. One of the foremost challenges in this solution lies in identifying appropriate microsites that can support the species restoration. Thus, we have introduced seedlings into three protected forest ecosystems, with significant differences in terms of soil properties. One of the three sites, the Lama Forest Reserve (LFR), exhibits the highest nutrient levels and optimal conditions for plant growth. These favorable conditions led to the impressive growth of the species at the LFR. Furthermore, the species was fruited within five years, demonstrating the potential for its reproduction and dispersal in these forests.