Ya thats about the age they start to munch. Feel free to give almost half his food as plants.
Accepted plants vary with individual preference and you should experiment to find your chameleon's favorites, but many veiled chameleons with eat the Ficus, Pothos and, more rarely, Schefflera plants decorating their cages. Chopped dark greens (e.g., romaine, mustard, kale, endive) and other plants your chameleons prefer should be offered once or twice a week in an elevated dish. Flowers to try include dandelion (and its greens) and hibiscus. Fruits and vegetables that are relished by many veiled chameleons include apple, strawberries and raspberries, mango, papaya, carrot and squash.
Mine's top favorites were:
blueberries
hibiscus flowers
cantaloupe
dandelion leaves
I wouldn't suggest that much for a young one. It is fine for them to eat some, but their main diet at a young age should be well-gutloaded insects. If you have live plants that are considered safe, they will sometimes eat leaves to supplement their water intake. (they do this in the wild during the drier months) My boy does enjoy kale, collard greens and some others.