Lake Owasso hosts a variety of aquatic plants, both native and non-native invasive species. The two primary invasive species on Lake Owasso – curly leaf pondweed, and eurasian water milfoil – are primary targets for annual treatment applications. Experts maintain a healthy lake hosts a diversity of plant species – ideally mostly natives. An overabundance of invasive species have at least two negative effects 1) native species tend to get drown out, and 2) the resulting plant base becomes less diverse. Eurasian milfoil was first discovered on Lake Owasso in June of 2000. There is no known record of the introduction date of curly leaf pondweed on Lake Owasso; however, it is known that curly leaf pond weed was first found in North America in the 1880’s where it is native to Eurasia, Africa, and Australia. While fully eradicating a particular plant is not feasible, eurasian water milfoil (per the annual treatment program) has been largely held in check since June of 2000.