Simplot Turf and Horticulture

Bring on the green.

The Superior Choice Ferrous Sulfate Heptahydrate.

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Extreme Green® 16

Use Extreme Green® 16 for a deep green and uniform color on golf, sports and landscaped turf

Extreme Green® 16 boasts 16 percent iron and 4 percent manganese for greening that comes quickly and color that's more pronounced.

A true ferrous sulfate heptahydrate, Extreme Green® 16 is not dried down and no anti-caking agents are added to ensure the highest level of freshness and purity.

Combined with manganese sulfate for added deepness of greening.

Readily goes into solution when mixed with water in a spray tank.


  • Iron (Fe) 16.000%
  • Manganese (Mn) 4.000%
  • Sulfur (S) 12.000%
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Data Sheet

Extreme Green® 16 features unique formulation that promotes tremendous solubility.

Download the full data sheet

How to use Extreme Green® 16

Application rates should be based on tissue or petiole analysis. On plants with waxy leaf surfaces, 12 ounces (355 mL) of a non-ionic wetting agent per 100 gallons (380 L) of finished spray; will aid leaf penetration. Add Extreme Green® 16 to half of the water, then agitate while adding remaining water. Add urea or other fertilizers. Add herbicides last while continuing to agitate tank contents.

Apply Extreme Green® 16 at a rate of 0.125 - 0.5 lbs. (2-8 ounces-dry weight) per 1,000 ft2 (5.5 - 22 lbs. / Acre). Apply every 2 - 8 weeks based on desired color response.

Spray solution as soon as possible. Extreme Green® 16 tank mixes are generally stable; however, agitate prior to spraying if mix has been standing for over 24 hours. Use sufficient water for good coverage. For optimum results, do not apply water for at least 4 hours following application. Do not apply to flower buds or blossoms of flowers, shrubs and trees.


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