This year (2021) was especially hard on my cool-season lawn. After a humid but relatively rain-less August, I had multiple brown patches and a few small patches of clover. I put Anderson's fertilizer down and sprayed the clover with Tenacity, but the fertilizer won out and the clover greened up and spread like wildfire. I've since put another application of tenacity on the clover and power raked the lawn in preparation for aeration and over-seeding, but the lesson I learned, was to kill the weeds first, then fertilize. I'll probably buy this again once my lawn has stabilized and the new seedlings are mature.