Hi-Yield Manganese Sulfate Granules is specially formulated to protect plants fro Manganese deficiency. Contains two active ingredients that help boost the nutrients of plants, keeping them healthy. Its sulfate helps in providing additional protein to plants while the manganese increases its metabolism. The Hi-Yield Manganese Sulfate Granules is a fast-acting water-soluble that prevents interveinal chlorosis or the yellowing of leaves while the vein remains green. It is proven to control frizzle top on palms wherein new leaves causes weak growth and yellowing. Also effective on shrubs, trees, and other plants and can help hydrangeas to bloom white. For easy application and better results, use as a foliar spray or as a soil treatment. Available in a 4-lb. bag.