Actually TG management's response to customer's concerns about applications being made in the rain would be; "Rain? It's the best thing for it! The product needs to be watered in anyway." I have seen TG's standard RAIN comments on their Service receipts. Here is a sampling: "Today's rain will provide beneficial moisture to the application and will activate today's treatment." "Rain later will not reduce the effectiveness of today's application." "Today's rain will activate the application."