Well, we've been growing a lot of peanuts for over 80 years, and nodulation is not a problem, as we have built an adequate level of fixation bactieria into our soils.

Occasionally, when we get into some new ground or pasture land, we inoculate. Better yet, I advise soil implant products through granular applicators for peanuts. Why? Well, a hopper box treatment is just harder to make stick to a peanut seed. Additionally, the less stirring and handling of peanuts the better. As good as those things taste, they are so prone to split in half, not very durable, and easily damaged, resulting in poor seed. 

Here is a product that I think will not let you down.