Disclosed is an aqueous composition comprising about 10 weight % of (S)-(+)-abscisic acid as the ammonium salt about 0.25 weight % potassium sorbate about 0.10 weight % Tween 20, about 0.25 weight % sodium sulfite, about 0.50 weight % sodium citrate, and about 86.4 weight % water. Further disclosed is a method of preparing the compositions as described comprising combining (S)-(+)-abscisic acid with water and Tween 20, adding concentrated ammonia hydroxide, stirring the mixture, diluting the mixture with additional water, adding potassium sorbate, and adding sodium sulfite and sodium citrate.
