Yes it is The vet said it looks like a papiloma but he wont look at the bump yet as he said it was still small instead he said my chameleon looks dehydrated so he told me i have to rehydrate my chameleon and gave me a syringe and liquid vitamins and hydration salt and he told me to rehydrate him...
You would also have to worry about the when the vegtables start falling off the vine and start rotting unless your planning on constantly taking out the vegtables and throwing them away unless your enclosure is bioactive and will eat the vegtables
It would be hard to grow vegtables like lettuce or kale because they grow in a very different climate to a chameleons enclosure so if you were to grow a vegtable you would have to find one that are non toxic and suits the chameleons climate and humidity levels