National Botanical Conservatory of Bailleul, National Botanical Garden in Bailleul, France.

The National Botanical Conservatory of Bailleul occupies a former Flemish farm at Haendries, northwest of Bailleul, where the resource centre founded in 1975 became the Centre régional de Phytosociologie in 1987. Its Jardin des Plantes Sauvages, opened in 2003 on one hectare, holds over 850 local plant species. Inside, a tall honey-brown wooden card catalogue cabinet with rows of small labelled drawers stands beside a table covered with printed materials.

The conservatory was established as one of 12 nationally recognized botanical gardens in France and plays a role in plant preservation. It houses a specialized library holding a substantial collection of botanical works.

The garden opened in 2003 to preserve endangered and protected plants of northwestern France and to teach the public why they matter. It is named after the Haendries hamlet, northwest of Bailleul, where the conservatory has occupied an old Flemish farm since the 1970s. Its herbarium and specialised library draw botanists from across the French-speaking world.

The site opens Monday through Friday and offers guided tours for groups along with educational workshops. A botanical laboratory with microscopes is available for closer examination of plant specimens.

The garden maintains plant species that no longer exist in the wild, making them scientifically valuable to researchers. This preservation work supports biodiversity conservation and provides resources for ongoing scientific study.