American Institute of Floral Arts

Features design courses in creating wedding arrangements, home decor, and topiaries using fresh and silk flowers.
http://www.floralclasses.com/

Floral Communications Group, Inc.

Comprehensive courses for hobbyists and professionals from instructor Ardith Beveridge. Includes image samples of featured projects.
http://www.floralcommunications.com/

Fun With Flowers

Features a Victorian, formal and contemporary design taught by Margaret Van Faussien.
http://www.fun-with-flowers.com/

How to Arrange Flowers

Features step-by-step instructions to create eighteen designs with over one hundred photos and online support. Created by professional florists.
http://howtoarrangeflowers.com/