The Master Gardeners are a wonderful source of gardening information. The program was begun 30 years ago in Washington State to provide a means of getting horticultural information and advice to the general public. Master Gardeners are volunteers who undergo extensive training and are under the supervision of your county Extension Agent. They provide gardening information to the public through Plant Clinics, Classes, Workshops, etc. that is specific to your area. The following are links to the varous state Master Gardener Programs. All provide information on how to contact your local Master Gardeners and many have gardening information.
State by State Contact Information