As you finally get back out on the course after this long winter, you may notice some white dots on the perimeter of the greens. "What are these for?" you ask.
These dots are a guide for the mowers, differentiating the collar from the green. Over time, collars can widen or narrow, based on mowing habits. With the current cool weather, and the greens still recovering from November's aerification, now is the best time to get the collars back to a uniform width. Trying to reclaim any lost putting surface in-season typically doesn't work well.
