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Old 08-01-2013, 10:12 PM
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RigglePLC RigglePLC is online now
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Join Date: Jul 2006
Location: Grand Rapids MI
Posts: 9,259
Iron on grass and crabgrass

I tested iron sulfate as an iron supplement for turfgrass using about 6 ounces per half-gallon of water, which covered abut 1000 sqft.

Iron applied to green grass (bluegrass plus fine fescue in light shade), caused very slight darkening of the color. Even when sprayed 8 times over, there was only a slight visible darkening effect. Dandelion appeared to be injured. There was no injury to the grass.

When the solution was applied 6 times over as a 30 inch stripe to crabgrass, near a road, a distinct darkening of the color was visible 8 hours later, probably due to some black staining. After 48 hours some of the crabgrass appeared to be injured or dead.
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