Dark green turf, stunted with purple colored leaves. The turf appears dark green, with a discoloration of the lower, older leaves. This dark green color of the lower leaves turns to a dull blue-green, followed by a purple discoloration along the entire edge of the blade. It is usually more purple on the underside. On some turf grasses, the purple coloring will change to dull reddish tints that appear on leaf tips first, and then go down the blade.
Dead tissue occurs then on the older leaf tips and progresses towards the base.
Like iron, phosphorous is less available in cold, wet soil conditions. Apply at a rate of 1.0 - 1.25 lbs. Of phosphorous per 1,000 square feet. Blotchy leaf blades, with intermittent leaf yellowing or whitening, withered leaf tips. Yellowing occurs between the veins, but the mid-vein retains its green color.