As a number of plant protection products become ever more constrained, biostimulants are seeing much more interest. Biostimulants seek to increase the turf plants resistance to abiotic stress and pathogens. They may also supply or support symbiotic species, again benefitting the turf plant.

A wide array of different materials, fungi, and microbes may function as biostimulants. Examples are seaweeds, humic and fulvic acids, amino acids, molasses, chitosan, soil oxidants, Geomyces and Trichoderma fungi, and a range of different bacteria species.