Can I use this on my grass? Will my sprinklers dilute this product’s efficacy? How often do I need to apply this to my lawn?

Yes, you can use it on your grass.... too much water can cause a run-off issue on side hills and unlevel areas.. I would plan on applying 20 days apart the first to applications, then 30 day later should work. Put a band around the perimeter where they are entering the yard too. be sure not to trap them inside... check for nesting areas before applying. Thanks for contacting us.