greens should be offered everyday, but since he is just a baby he should be getting a lot more bugs than greens, i would say offer him as many greens as he can eat after feeding him as many bugs as he can eat because that is the most important at this stage in their life. it’s good to just introduce it to him, don’t worry too much if he doesn’t eat it this early in his life, right now just focus on beefing him up with gut loaded and calcium dusted crickets