The dynamics of warmth, light and nutrients in lakes cause a fairly predictable pattern in seasonal algal species, but there may be surprises at any time. Westerly breezes blow plantlife into coves; and obstructions such as docks commonly catch plants in some locations.
The shoreline zone is the last defense against pollutants coming off the land. How you design and maintain your lakefront area can determine whether significant impacts to the water will occur. You may be causing the algae hovering at your shoreline! Prior to using fertilizer get your soil tested to determine what nutrients your lawn or garden needs.
Use landscape plants that minimize the need for fertilizer and chemical pest control. Reduce the use of fertilizers and pesticides near the shore. Establish a buffer of plants near the shore. Low-maintenance (preferably native) grasses, wildflowers, perennials, shrubs and trees may be planted. Low-growing species should extend into and be closest to the water. Trees and larger plants should be farther from the shore. The deep root systems of native grasses, wildflowers and shrubs will protect the shoreline from erosion, minimizing the need for hard armoring with rock riprap or seawalls. The perfect buffer strip is a wide, continuous and dense; but even a 10-foot-wide strip of unmowed grass along the shoreline will slow runoff and pollutants