Vitazyme greatly improved the performance of this potato crop in Mexico, as determined by a split-field design. The tubers were larger on average with Vitazyme, the 1 A and 2A classes being increased by 15% above the controls in terms of percentage of the total weight. The total yield of tubers with Vitazyme was 41% greater than for the control, and total income was increased by 83,755.7 pesos/ha ($9,306.19/ha) using this highly effective crop biostimulant.