Join Historic New England at Casey Farm’s kick-off event for the summer season. A variety of organic plants are available for sale, including unusual and old-fashioned varieties of annual and perennial flowers, heirloom vegetables, and culinary herbs.  Free tours of the grounds will continue throughout the day and the festivities extend through Sunday, May 10 (10-4).  Admission free.  Casey Farm, Saunderstown, Rhode Island.  For more information and directions call 401-295-1030, or log on to www.historicnewengland.org.