Vigor is a Potassium-buffered Mauget tree injection Phosphorous Acid material, providing additional potassium nutrition in addition to phosphite technology. Vigor 53 works well in a total PHC program that emphasizes natural plant health defense systems. The additional potassium aids in leaf thickening, better stem and root development, and stimulated frost or cold damage recovery. University research has extensively demonstrated the ability of potassium to aid in the recovery of leaf and stem diseases as well as other stress agents involved in drought avoidance.