Ferrous Sulfate (Iron Sulfate)

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SKU-131-1 Pound - Free 2-Day Delivery

As one of the 17 essential plant elements, iron is commonly applied in a various lawn, turf and landscape settings. Often, Ferrous Sulfate fertilizer is used to correct Chlorosis (yellowing of the leaves). In the plant, iron plays a role in photosynthetic electron transport, respiration, chlorophyll formation, and numerous enzymatic reactions. Due to its use in chlorophyll formation and photosynthesis, Iron (Fe) is often applied to enhance greening without increasing plant growth.


Some features include:

  • It is Water Soluble Powder
  • Essential for chlorophyll production
  • Promotes energy transfers
  • Required in photosynthesis
  • Part of the enzyme system needed for plant respiration
  • Required for the formation of some proteins
  • Promotes healthy growth in plants


Application Rate:

Foliar Application: Mix at the rate of 1-2 Tablespoons per gallon of water or 5-8 Pounds per 100 Gallons of water.

Flowers & Vegetables: Apply at the rate of 1/4 to 1/2 Pound. (1/2 to 1 cup) per 100 square feet.

Trees & Shrubs: Apply at the rate of 1/2 Pound to 1 Pound. (1 to 2 cups) per 100 square feet.

Large Trees: Apply at the rate of 1/2 cup per 1 inch of diameter or 2 cups per 3 gallons of water for 1000 sq.ft.


How to Kill Moss with Ferrous (Iron) Sulfate:

1. Mix 1/4 to 1/2 Pounds of Greenway Biotech, Inc. Ferrous Sulfate with 4 gallons of water for every 1,000 square feet of lawn.

2. Spray the solution you made on your entire lawn and concentrate on area with existing moss. (Note: you need to spray your entire lawn even the areas without moss to prevent future growth).

3. Do NOT water the lawn after apply the Ferrous Sulfate treatment and allow several days to kill the moss.

4. Get rid of the dead moss patches on your lawn. (Note: you could simply pick them out by hand.)

5. Spread 5-10 Pounds of Greenway Biotech, Inc. Calcium Carbonate (Limestone) per 1,000 square feet of lawn to neutralize the acidifying effects of Ferrous Sulfate.

Note: Make sure your lawn is not covered in excessive shade, which is suitable for growth of moss.


  Pounds of Ferrous Sulfate Required to Lower pH level per 1000 sq.ft.      
 Current Soil pH Level Desired Soil pH Level   Soil Type  
    Sand Loam Clay
8.5 6.5-6.8 230 285 345
8 6.5-6.8 140 170 230
7.5 6.5-6.8 55 90 115
7 6.5-6.8 10 20 35