Inside Sweetfern Geometer, the seasonally driven restaurant that opens Saturday on Washington Avenue. (Courtesy of Sweetfern Geometer)Farm-to-table restaurant Sweetfern Geometer opens Saturday on Washington Avenue in the former Bake Maine space. Sweetfern Geometer is a casual fine dining concept. Mourning Cloak and Sweetfern Geometer are named for native Maine butterflies and moths. Sweetfern will be open Wednesday to Sunday from 5 p.m.-9 p.m. Reservations can be made by email at [email protected].