Why do putting green grasses turn red, blue or purple in the fall? The cold temperatures causes the turf to reveal a different color in the leaves. During the day sugar production in the grass blades is stimulated. When nights are cold and frosty the sugars do not completely move out of the leaves. The sugar then attaches to a pigment which causes the turf to look another color. The turf is still very healthy and plays well but is simply a physiological process that the greens go through. Interesting.
