Biostimulants are products that stimulate plant growth independently of the product’s nutrient content. Efficacy testing is crucial given that many commercial products on the market have been shown to be ineffective.
Biostimulants are products that stimulate plant growth independently of the product’s nutrient content. Efficacy testing is crucial given that many commercial products on the market have been shown to be ineffective.
In the European Union, biostimulants fall under the Fertilizer Products Regulation, which stipulates that “the plant biostimulant shall have the effects that are claimed on the label for the plants specified therein.” We suggest that this definition of product efficacy is inadequate, and should be expanded to include both the mode of action and the quality of the product.