When Mike and Margrete Stevens first came to Fauquier County eighteen years ago, as the new owners of Bonny Brook Farm, near Warrenton, they made friends with their neighbors Julian and Sue Scheer and Hilary and Rich Gerhardt (the Scheers’ daughter and son-in-law). This friendship with a family of dedicated conservationists led the Stevens to start hosting a wildflower walk on their land each April, as a sky-colored carpet of Virginia Bluebells blossoms along Cedar Run.