The National Botanical Conservatory of the Pyrenees is a mixed union of communities dedicated to the knowledge, conservation, evaluation and valorisation of the plant heritage in all its diversity. As the National Botanical Conservatory approved by the Ministry of Ecology, it has the following tasks: — Knowledge of the state and evolution, assessed according to scientific methods, wild flora and natural and semi-natural habitats. — Identification and conservation of rare and threatened elements of wild flora and natural and semi-natural habitats. — Information and education of the public on the knowledge and reservation of plant diversity. In this context, the National Botanical Conservatory of the Pyrenees has set up two programmes with the aim of better revegetalisation practices in the Pyrenees massif: The Ecovars + programme (2008-2013) has developed support for project managers and space managers in the implementation of ecological revegetation techniques. The Ecovars 3D programme (2014-2019), the last few years of which is the subject of this dossier, aims to generalise revegetalisation techniques with seeds of Pyrenean origin. The support for the actions carried out by the partners is carried out by the staff of the conservatory (botanist, phytosooliogue, agronomists, gardeners, ethnologist, mycologist)