Can I deter frogs from coming into my garden?

I agree, why would you want to? They don't hurt the plants, but actually help them by eating harmful bugs. Besides, I think they are cute, and the real ones will save you buying ceramic ones. We have a greenhouse and raise hostas. Every once in a while I will get a resident frog in the greenhouse, and I am quite happy to leave him there to help me get rid of a fly or two!