Method of using a plant growth stimulating composition

A method of preparing a microbial culture comprising:

• i) obtaining a starting microbial culture from the gastrointestinal track of a mammal;
• ii) culturing said starting microbial in a culture medium comprising sodium, potassium, calcium, magnesium, inorganic phosphorus and chlorine or salts thereof;
• iii) culturing the microbial culture resulting from step (ii) in the presence of a food source comprising a grain or a grass;
• and
• iv) separating the microbial culture resulting from step (iii) from said food source.