Map Groeb Farms, Inc. 10464 Bryan Highway, Onsted, MI 49265 Add To Trip EmailPhone: (517) 467-2065Fax: (517) 467-2840 Description We are the world's largest processor of honey. We offer other food service and industrial products such as molasses, peanut butter and mustard. Our plants are located in Michigan, Florida, Texas and California. Videos TripAdvisor® Traveler Reviews More To Explore Categories: Tours Attractions City: Onsted Region: Southeast Although the MEDC uses reasonable efforts to maintain the accuracy of the website content, it is not represented to be error free. Read legal information.