An aqueous adjuvant concentrate can be prepared using a formulation including: a. from about 15 to about 45% by weight of a potassium salt chosen among di-potassium phosphate, potassium sulfate, potassium nitrate, tri-potassium citrate, potassium salts of ethylenediaminetetraacetic acid and mixture thereof; b. from about 0.5 to about 6% by weight of at least one surfactant and c. from about 3 to about 9% by weight of a hydroxypropyl tamarind gum; wherein a, b, and c are dissolved into the aqueous adjuvant. The aqueous adjuvant can include other compounds such as ah herbicide.