Potassium chloride is highly water-soluble.
At excessive rates, muriate of potash can cause salt damage to plants. Other potassium materials used in specialty fertilizers are also listed in Table 1. Description of common fertilizer materials. Must be injected 6 to 8 inches deep on friable, moist soil. N loss by volatilization can occur if not properly injected or if soil is too wet or too dry at application.