NOVELTY - Preparing organic foliar fertilizer, by boiling peeled potatoes and water, adding e.g. glucose, sterilizing, inoculating Pichia pastoris slant culture in sterilized product, incubating to obtain seed liquid, inoculating seed liquid in fermentation medium, culturing to obtain fermented broth, mixing with water and corn germ, filtering to obtain phosphorylated enzyme solution, boiling corn germ and water, adding neutral protease, filtering to obtain proteolytic solution, and mixing phosphorylated enzyme solution, proteolytic solution and plant ash extract.    USE - The method is useful for preparing organic foliar fertilizer for herbaceous plants (claimed) e.g. watermelon.    ADVANTAGE - The prepared fertilizer increases yield of watermelon.    DETAILED DESCRIPTION - Method for preparing organic foliar fertilizer, involves (a) (i) inoculating Pichia pastoris strain in potato dextrose agar (PDA) slant medium, (ii) taking 200 pts. wt. peeled potatoes and 1000 pts. wt. water, boiling for 30 minutes, filtering the extract using gauze filter, adding 1000 pts. wt. water, 10 pts. wt. glucose, 4 pts. wt. peptone and 1 pt. wt. magnesium sulfate to the filtrate, heating the mixture, sterilizing the heated product at 0.11 MPa for 30 minutes, inoculating P.pastoris culture obtained in step (i) in the sterilized product, and incubating at 28 degrees C and 120 revolutions per minute (rpm) for 45-48 hours to obtain seed liquid, (iii) inoculating the 3-5 wt.% seed liquid in fermentation medium comprising 200 pts. wt. potatoes, 8 pts. wt. dextrose, 1 pt. wt. methanol and 1000 pts. wt. water, and culturing at 30 degrees C for 35-45 hours to obtain fermented broth, and (iv) mixing 1-3 pts. wt. fermented broth, 40-60 pts. wt. water and 10-30 pts. wt. corn germ, stirring the mixture uniformly, maintaining at 45-55 degrees C for 30-60 minutes, stirring the mixture for 1 minute for every 15-20 minutes, and filtering the mixture to obtain phosphorylated enzyme solution, (b) boiling 20-40 pts. wt. corn germ and 40-60 pts. wt. water for 10-20 minutes, adjusting pH of the extract to 6.5-7.5, adding 0.03-0.06 pts. wt. neutral protease to the mixture, stirring the mixture for 2-5 minutes, maintaining at 45-55 degrees C for 2-3 hours, stirring the mixture for 2-3 minutes for every 0.5 hour, and filtering to obtain proteolytic solution, (c) taking 20-40 pts. wt. plant ash and 40-80 pts. wt. water, stirring the mixture, placing the mixture at room temperature for 20-30 minutes, and filtering the mixture to obtain ash extract, and (d) mixing 10-30 pts. wt. phosphorylated enzyme solution obtained in step (a), 20-40 pts. wt. proteolytic solution obtained in step (b) and 40-60 pts. wt. ash extract, adjusting pH of the mixture to 6-6.5, filtering the mixture, and sterilizing the filtrate.