Potassium thiosulfate, which contains 25% water-soluble potassium (K2O) and 42% water-soluble sulfur (SO3), is a liquid potassium fertilizer that can be applied to the soil in the middle of the growth season with drip and sprinkler irrigation and to the leaves with a sprayer, since it does not contain chlorine. It is an ideal fertilizer solution that can be used from soil and leaves to feed all kinds of plants that need potassium and sulfur. It is marketed in plastic cans and bottles of various sizes.