Dahlia Blue Book for 1947

This is the February 1947 dahlia catalog from Rocky River Dahlia Gardens near Cleveland, Ohio. The issue contains cultivation and ordering information, an explanation of American Dahlia Society classification abbreviations for size, flower type, and color, and detailed information about the nursery's propagation methods for green plants and rooted cuttings. A significant section discusses red spider mite control using DDT, Dowspray-17, DN-269, and NNOR insecticides, recommending precise application techniques to minimize foliage damage. The catalog features three new Rocky River dahlia introductions: Windlassie (white informal decorative), Clara Hook (golden yellow straight cactus), and Major Viers (buff yellow formal decorative), each with award records and specifications.