Back in May I purchased 10 bags of Vigoro 29-3-4. The material in the bags varied in predominant color from bag to bag - some were mostly white, some green, and some were a blend of 4 colors. I applied the fertilizer hoping the colors were just cosmetic. Soon afterwards, the lawn started to show bands that seemed to coincide with the different bags of fertilizer. Vigoro advertised a money back warranty if not satisfied, so I sent a letter along with proof of purchase and the bar code from each bag. To make a long story short, Vigoro has not honored their stated warranty. Every time I call I get a promise that the check will soon be arriving. I even wrote to the President- Taylor Pursell and didn't get any response from him. The lawn finally did come back, but I'll never forget the poor performance of Vigoro and the lack of customer support.