After the establishment of the Heath farm, Fannie Heath focused on finding a way to neutralize the high
alkalinity of the soil by applying vinegar as an acidic countermeasure. It took multiple different attempts and modifications of the soil, but she was eventually able to establish flowerbeds, vegetables and fruit trees. She corresponded with horticulturalists around the country to obtain new seeds and, while many failed to survive in the soil, she kept extensive notes on her experimentation. The flower seeds she was cultivating were sent out to her correspondents and there was a growing demand for her flowers around the world. In 1920, she was involved in establishing the
National Horticultural Society at the request of
Hamilton Traub. The society was officially established in 1922 and Fannie was given the position of vice president. During the November 1923 meeting of the society, the National Botanical Garden and Herbarium was established in Grand Forks and Fannie donated 250 specimens to its creation. She also joined the
Great Plains Horticulture Society in 1925 after she was invited. By 1925, the four acres of the Heath farm had more than 450 different species and over 100 people a week were visiting her garden. This became too much and she ended the public tours. ==Death and legacy==