If your dog is used to using potty pads we suggest that you take on of the potty pads and place it on the grass area initially. This will send the message that this is also an area where it is ok to do their business. After a short while cut the pad size in half, and then a little later remove the pad completely.
This is a fast and easy way to transition your dog from using messy potty pads, to using the real grass dog potty box.