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Biostimulants are « fertilizers that stimulate the nutritional process of plants, regardless of the nutrients they contain, for the sole purpose of improving one or more of the following characteristics of plants or their rhizosphere:

  • the efficiency of nutrient use,
  • tolerance to abiotic stress,
  • qualitative characteristics,
  • the availability of nutrients confined to the soil or rhizosphere”

Source: European Commission definition (from the European Regulation 2019/1009 published in the OJ in June 2019 and which will apply in July 2022).