Plant Biostimulant Regulatory Framework: Prospects in Europe and Current Situation at International Level

Abstract

This review analyses the current regulatory procedures for plant biostimulants, both at an EU level and beyond the EU, and explores the future regulation of these substances in the EU. Plant biostimulants are defined as products that stimulate plant nutritional processes regardless of the product’s nutrient content, with the sole aim of improving one or more of the following characteristics of the plant and the plant rhizosphere or phyllosphere: the efficiency of nutrient use, tolerance to abiotic stresses, crop quality traits, availability of confined nutrients in the soil and rhizosphere, humification and degradation of organic compounds in the soil. This definition is reported in the proposals for new rules to regulate making CE-marked fertiliser products available on the market. This regulation, which includes a plant biostimulants category, will repeal the existing Fertilisers Regulation (EC) No. 2003/2003. This category of compounds is also used in non-European countries. Currently, as there are different market conditions and different national regulation requirements for plant biostimulants in different countries, the non-harmonised regulatory processes can lead to unfair competition between operators. The assessment of plant biostimulants should be harmonised as far as possible, to avoid fragmentation and ensure a level, reliable playing field. It is essential that a common market is created for these substances.