baby diamondback & greens

Hi Guys, I wrote a couple of weeks ago and I did not get an answer. This is the first time I have a babby diamondback. I own an adult but never a baby. When and what greens do u start a baby with. My adult won’t touch them and I want the baby to start off on a good diet. I feed him now baby reptomin and blood worms, sometime guppies I tried live brime shrimp but he did not eat them. He is about 6 months old give or take a month. Chun or Jon any suggestions. Thanks Maryann