A composition for promoting plant growth includes sulfur, soybean oil, and an emulsifier of a fatty acid and a saponifying aqueous base together forming an emulsion, or a soap or a detergent acting as an emulsifier. Regardless of the form of the emulsifier, a composition as applied to vegetation which has a basic pH of between 7.5 and 11 appears to improve efficacy. Specific aqueous compositions as applied for promoting plant growth include 0.05 to 2 total weight percent sulfur, 0.05 to 2 total weight percent soybean oil, 0.05 to 2 total weight percent fatty acid and an aqueous base present to provide a basic pH of between 7.5 and 11. A concentrate for the composition which upon dilution with water is well suited for spraying and promotion of plant growth is provided. Another specific composition for promoting plant growth consists of 0.05 to 2 total weight percent sulfur, 0.05 to 2 total weight percent soybean oil, an aqueous base present to yield an as applied pH of 7.5 to 11, and optionally at least one of a biostatic, an oxidizer, a soap, a detergent, a natural oil, or combination thereof.
