I am new to owning beardies but I have two adults. They like collards greens, cucumbers (poor nutrition), and raspberries/blackberries the most. I use dubias as a staple diet, although I know it's not ideal. A variety is best; I'm not a fan of crickets though.
I'v had Spike, the adult dragon since I was 9 (seven years) and I've only recently been finding out that we havn't given him the best food. So collards greens good or bad? The site said the greens are a good staple but I want to double check.
Collards are good. I feed mine kale and endive with superworms right now, with cucumber, banana, and hornworms on occasion. I'm trying to get him more varied foods, but he's a picky eater! He actually stopped eating crickets a while back.
The best diet is one that's as varied as possible. Any kind of live prey like roaches, superworms, phoenix worms, butterworms, hornworms, etc but try to make sure that the prey item isn't any larger than the space between the beardie's eyes or there could be an impaction risk.
Any kind of greens are also good: collared, mustard, turnip, dandelion, etc. Squash is also really good; I put it through a blender to turn it into a mush that's easier to eat
Supposedly they slow down on insects and transition to veges as the age, but I've not found thid to be true. Lettuce is a big no no as stated above it has no nutritional value. Adults become obese very easily when they are fed nothing but insects. Seedless Grapes, kale, seedless strawberrys, and celery are all viable options.
Both of our beardies show little interest when shown a variety of veggies. They might eat a couple of bites. I'm going by the store today to pick up some collard greens, mustard greens and a couple other things to see how they like it.