Missouri Wildflowers-Missouri Wildflower Guide

            Annual Flower Seed Germination Guide-Iowa State University

            Flower Growing Guide-Cornell University

            Missouri Flora Webpage

            Perennials-Nebraska Extension

            Gardening with Annuals-University of Illinois Extension

            All America Selections

            Landscaping Plants of the Upper Midwest-University of Wisconsin Extension

            Landscaping with Rhododendrons and Azaleas

            Spring Flowering Trees-North Carolina State University

            Grow Native

            Ground Cover, Rock Garden Plants and Ornamental Grasses-Kansas State University

            Trees Are Good-International Society of Arboriculture

            UI Plants Database-University of Illinois Urbana-Champaign

            Sustainable Urban Landscape Information Series-University of Minnesota

            ID It! Leaf and Twig Keys-Dendrology at Virginia Tech

   Perennials for Season-Long Bloom - Minnesota Extension

   Perennials by Bloom Time - Bordine Nursery

   A Perennial Flower Bed Design - Kansas State University

   Perennials: Culture, Maintenance, and Propagation - Virginia Extension