Business Directory Go back to directory. Montana Woolgrowers Montana Woolgrowers Work P.O. Box 1693 Helena MT 59624 work Work Phone: 406-442-1330work Website: Montana Woolgrowers NotesMontana Wool Growers was established in 1883, making it the states oldest agriculture organization in Montana. Montana Wool Growers Association advocates for, and works on behalf of, Montana’s farm and ranch interests, namely Montana’s sheep industry. Montana Wool Growers Association also seeks to promote the economic health of Montana and Montana’s agriculture industry and the Montana communities, businesses and people supported by agriculture.