Bank Hall Gardens comprise 18 acres (73,000 m²) of curtilage at Bank Hall, in Bretherton, Lancashire, England. The gardens contain specimen trees including a yew thought to be the oldest in Lancashire. Many architectural features, statues, low garden walls, conservatory and greenhouses have gone but there are plans to recreate them. The Bank Hall Action Group has tended the grounds since its formation in 1995. the group has planted specimen trees and identified the flora and fauna. The group opened the gardens to the public in 1999 after building a security fence, erecting scaffolding to secure the building and clearing the overgrowth. New varieties of snowdrops, some of which are unique to the gardens were uncovered.