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The purpose of this paper is to examine knowledge sharing on traditional vegetables for supporting food security among farmers and other communities in Kilosa district, Tanzania.

A case study design was employed. Semi-structured questionnaires with both open- and closed-ended questions were used to collect quantitative data in three wards of Kilosa District in Tanzania. Interviews were used to collect qualitative data from three heads of farmer groups, and direct observation was used to validate findings obtained from questionnaires.

The results showed that farmers used a socialisation approach to share indigenous knowledge about traditional vegetables on production, consumption and preservation.

The study necessitates a need to conduct regular studies on sharing knowledge of traditional vegetables among different communities for supporting food security.

The paper provides a framework for agricultural development planners on how to improve the management of indigenous knowledge on traditional vegetables with scientific knowledge in local communities for improving food security in Tanzania.

The paper has an implication for improving knowledge-sharing strategies on traditional vegetables in supporting food security in Tanzania, and other parts of Africa and developed countries. There is a need for knowledge intermediaries to develop knowledge database on production, consumption and preservation of traditional vegetable to increase the dissemination of this knowledge and, hence, improve nutrition and food security.

The paper provides appropriate knowledge-sharing strategies which are needed to improve sharing of indigenous knowledge about traditional vegetables in Tanzania and other developed and developing countries.