The present invention provides novel bioreactor systems, adapted to provide continuous batch incubation of microbes, especially bacteria. The bioreactor bags are preloaded with dry, inert microbes prior to being shipped to the user. Multiple sterile, preloaded, disposable bioreactor bags are used in a self-contained housing. The bags are automatically incubated in the housing and dispensed, preferably into an irrigation system. The system will provide serial batch production of useful microbes for a week or more, without further supervision or intervention.Methods of manufacture, methods of use, methods of sales, and methods of farming are also provided.