Cross-border projects are developed with for example, the INTERREG France / Wallonia / Flanders project with the Memorial Museum Passchendaele 1917. The aim is to create a Belgian Peace Garden in France (Le Quesnoy) and a French Garden of Peace in Belgium (Passchendaele), with professional actions of networking and cross-mediations. A second cross-border project is under consideration with British institutions such as the National Trust. A very ambitious project is taking shape which will be divided into three common themes: artistic gardens, food producing gardens and mining areas.
International partnerships have also been forged with, for example, the Municipality of Teheran for a Filter Garden Festival (qanats) in the heart of the Iranian capital. In March 2019, a partnership agreement was signed with the National School of Architecture of Marrakesh in two parts: one for the establishment of a Garden Festival in Marrakesh as part of Marrakesh, African Capital of Culture 2020, and the other for the accompaniment of the launch of a «Landscaping» section, with the National School of Architecture and Landscaping in Lille.