Bio-stimulant use in turf. Increasingly bio-stimulant use in turf is becoming common as turf managers become aware of the impact of many synthetic fertilizers and pesticides on the environment. However, there is a constant stream of new products coming onto the market all making claims which are often unfounded and with no supporting data. This is an article outlining some of the options available and what they can potentially do for you. What options are there for bio-stimulant use in turf? Despite only being used in minute quantities bio-stimulants give a favourable response with common commercial bio-stimulants being combinations of: Humic substances; Plant hormones; Seaweed extracts; Amino acids and lastly True biological stimulants. Click on the link above for more info