You can offer them daily, when I use to breed bearded dragons, I offered my babies greens every other day. They are growing and they need a lot of protein. That's why they eat a lot of insects untill they are around 12-18 months old(just about full grown at this stage). You could offer them he might take a few bites of his greens or he may not. Just give him a soak 2-3 times a week, or drop some water on the tip of his mouth to see if he will drink(don't spray him tho, it can go in his nose and cause a RI). This way you know he is still staying hydrated. Just be careful they grow quick(you will be shocked) got mine in November 2011, she was 15 grams, weighted here yesterday she was 473 grams (after she pooped). She is only 14 months old, still loves her dubia more than her greens.