TALLHEDA is a Horizon Widera project that aims to build a new long-term Alliance for Digital Agriculture between agricultural Higher Education Institutes from two Widening countries Greece and Serbia with leading non-widening agricultural universities, and local and international stakeholders from Belgium. TALLHEDA Alliance will contribute to raising the critical mass of highly skilled scientists and to establishing liaisons with surrounding ecosystems, in order to foster the Quadruple Helix of innovation in Widening countries.