An ultrasonic mixing reactor configured for mixing of plant nutrients for greater absorption using cavitation. The reactor includes a venturi nozzle fluidly connected to a nozzle device having at least one annular shaped plate comprised of a plurality of apertures constructed and arranged to create cavitation. The nozzle device is fluidly coupled to a first ultrasonic reactor having a plurality of variable frequency ultrasonic transducers mounted within the first ultrasonic reactor for generating acoustic cavitation of the bulk mixed plant nutrients. The first ultrasonic transducer is fluidly connected to a second ultrasonic reactor having a plurality of variable frequency ultrasonic transducers mounted within the second ultrasonic reactor for generating acoustic cavitation of the bulk mixed plant nutrients. The second ultrasonic reactor discharge is fluidly coupled to a plate static mixer constructed and arranged to create hydrodynamic mixing.
