Increase plant vigor and disease resistance! Muriate of potash is an excellent source of potassium which aids healthy plant growth disease resistance. Increase plant vigor and helps stiffen steams and aids in fruit formation. Muriate of Potash is great for your root and tuber crops like carrots, beets and potatoes as it promotes healthy root growth. 5 lb. bag covers 1000 square feet. Guaranteed analysis: 0-0-60.