Beautiful Gardens 2012 Slim Appointment Calendar. This attractive slim format wall calendar is perfect for any potting shed, greenhouse or home, and features some of the most inspiring gardens in the country as well as useful gardening tips that will help everyone make the most of their own garden. This Beautiful Gardens 2012 Calendar has been produced in association with Perennial - the gardeners' royal benevolent society who have been helping horticulturists in need since 1839.