Bag shows 99.5% pure Lab Analysis is 99.88% pure Used for keeping foliage of plants nice and green. Apply a small amount monthly. Ideal citrus trees and similar. Note it takes about 3 months for yellow foliage to become green again. Ideal as a relaxing bath salt. bathing in Magnesium sulphate for about 15 minutes gives your body the magnesium’s requirements. Relaxing muscles and boosting energy.

Even a foot bath with the salts added is very beneficial. Excellent product , excellent price. See our other listings for smaller amounts.