Believe me, there is a chapter in your neighborhood, as there are over 3000 members in Indiana alone located in 132 clubs. Approximately 244,000 members nationwide, but no at-large membership. You need to join through the club in your neighborhood. Contact them for information on the garden club nearest you. 16,000 plus members in the State of Indiana.
Most counties have one or more projects in action.
Known as nature's real estate agent. Just across the river from Southern Indiana. No chapters in this State as yet. Quite active, with both indoor and outdoor activities. Excellent resource handbook comes with membership.