Online Seed and Plant Catalogs for Container Gardening
White Flower Farms
Great site, great plants!
Johnny's Selected Seeds
Johnny's Seeds has a great variety of organics and unusual seeds, as well as the classics.
Annies Annuals and Perennials
Annies offers rare and unusual annuals and perennials.
Thompson & Morgan
The Thompson & Morgan site sells seeds and more, including "Flower Pouches."
A great site for information and photos. You can also order online or find a local nursery that carries "Proven Winners," brand plants.
Huge selection of perennials, bulbs, vines and climbers.
Five Tips for Buying Plants Online
5 tips for buying plants online.