Questions similar to this get asked frequently on weight training and bodybuilding forums. And there is no shortage of "experts" and marketers making outrageous claims for wild muscle growth with certain programs and diets. I'm talking about steroid-free training here.
The variables are many -- men, women, young, old, skinny, fat -- you name it; it won't be the same for everyone, naturally. Let me know your best month here.
Full article is here: ---> How Much Muscle in a Month?