J from Cincinnati, Oh writes
How often should I apply Hi - Yield Manganese Sulfate Granules on blue spruce trees with a magnesium deficiency?
Answer:
Hi-Yield Manganese Sulfate Granules
 can be used on trees. Per the label: For Large Shrubs and Trees: use ½ lb. per tree. If symptoms are severe, apply every two to three months
Answer last updated on: 09/14/2020
