PROBLEM TO BE SOLVED: To provide a hydroponics method which can promote the growth of a specific vegetable, and a bacterial strain for use in hydroponics.SOLUTION: This invention provides a hydroponics method in which at least one of Bacillus amyloliquefaciens, Pantoea agglomerans, and Pseudomonas fluorescens, each of which promotes the growth of a vegetable, is added to a culture medium to grow the vegetable.