Hello DR. We&#39;re sorry to read about your disappointment with Roundup Weed &amp; Grass Killer4 Ready-to-Use and appreciate your feedback. <br /><br />To get the best results while using Roundup Weed &amp; Grass Killer4 Ready-to-Use, you want to be sure the weed(s) you are aiming to control are listed as this product will only control listed weeds.; even though this is a non-selective weed control, some weeds, like weeds with a waxy surface, are more difficult to control. It can also take up to 2 weeks for complete control of the weeds, and a reapplication may be needed after 28 days. You also want to ensure that the air temperatures are above 60 degrees, the weeds are actively growing, and the weed leaves are thoroughly and uniformly covered with spray solution to get the best results.<br /><br />We want you to be confident in our products. For this reason, we offer a product guarantee. If for any reason you, the consumer, are not satisfied with the results after using this product, you are entitled to get your money back. Limitations apply. At your earliest convenience, please reach out to us at 866-324-2647 if we can further assist.

Hi GW. We're sorry to read about your disappointment with Roundup Weed & Grass Killer4 with Concentrate Refill and appreciate your feedback. To get the best results when making an application of Roundup Weed & Grass Killer4 Concentrate Refill, we suggest doing so when the weeds are actively growing and your air temperatures are between 60 and 85 degrees. It can take up to 2 weeks for complete control. Also, to get the best results, the plant leaves must be thoroughly and uniformly covered with the spray solution.We want you to be confident in our products. For this reason, we offer a product guarantee. If for any reason you, the consumer, are not satisfied with the results after using this product, you are entitled to get your money back. Limitations apply. At your earliest convenience, please reach out to us at 866-324-2647 if we can further assist.