Biostimulants are products that stimulate and enhance processes in the turf such as respiration, photosynthesis, root development, nucleaic acid synthesis and ion uptake.

Biostimulants are different from nutritional fertilisers because they may also contain a mixture of things such as micro-organisms, trace elements, enzymes, plant hormones, and seaweed extracts that enhance the performance of the plant. Examples include improved nutrient availability, better water-holding capacity, increased antioxidants, enhanced metabolism and increased chlorophyll production.