To the reviewer that states that the product did not work. Read the instructions. You said that you did an application and then it rained for 4-6 hours in watering in the granular. You were not supposed to use the product when it is supposed to rain. The instructions say to apply in calm non rainy weather. That is why it did not work. The product washed away.
This product worked for me after following the instructions. Hooray!