A bio-fertiliser can be broadly defined as preparations containing living or latent cells of microorganisms that, when applied to seed, plant surfaces, or soil, promote growth by several mechanisms such as increasing the supply of nutrients, increasing root biomass or root area and increasing nutrient uptake capacity of the plant. The definition of bio-fertilisers can be close to bio-stimulants; another class of products that help plant growth. They too can be defined as “a substance or microorganism that, when applied to seeds, plants, or on the rhizosphere, stimulates natural processes to enhance or benefit nutrient uptake, nutrient use efficiency, tolerance to abiotic stress, or crop quality and yield.   The main difference is that bio-fertilisers are expected to contain sufficient levels of plant nutrients (e.g. Nitrogen, phosphorus, potassium, calcium, magnesium, etc.)   We label Arktivate as a bio-fertiliser because it carries all the properties of both bio-stimulants and fertilisers, delivering a diverse microbial ecosystem needed for plants to thrive, while also containing the required plant nutrients for growth.