A silly sign of spring

I heard an ad on TV this morning for grass seed, extolling the virtues of this particular seed in filling in bare patches in a lawn.  I automatically glanced out the window toward the bare patch in my front yard only to realize that it was still completely blanketed with snow, sob!  However, when I came home this afternoon snow was melting and large patches of lawn (including the bare spot) were showing through, so hooray! spring is on the way.  Now if I could only remember what kind of grass seed that was.