Any plant used with a chameleon should be thoroughly washed with soapy water and rinsed well, to remove toxic fertilizer and insecticide residues.
See here for more info on adding plants to enclosures: https://www.chameleonforums.com/care/enclosures/
Yeah I had a feeling the Ficus was called a few different things. A lady in a shop turn slightly hostile once I said it was off in my chameleons vivarium. I though I wasn't meant to put them in but I guess she just didn't want her lovely plants to be eaten haha