Steve Dobbs. Oklahoma Gardener’s Guide. Cool Springs Press 2005-01-01. Opened in 1989, Online Since 1995.
Book, MN Gardener’s Guide, Paperback, M. Myers, Cool Springs Press, 2001
448 pages, includes: Introduction with explanation of symbols, chapter introductions with hints & tips , small illustration for each chapter, 14 pages of full color photos, a few quotes about gardening, 15 pages of resources, a hardiness map, a precipitation map, 10 pages for notetaking, 11 page index. Prepared and presented with input and editing by the Minnesota State Horticultural Society.