Former Hollywood madam Heidi Fleiss has been charged with drug possession after police found nearly 400 marijuana plants at her Nevada home.

Authorities were looking for another woman when they turned up at Fleiss' property on 7 August (13) and stumbled upon the massive pot farm.

Tom Sizemore's ex-girlfriend allowed officers to search the house and she allegedly admitted to owning the plants, claiming she was growing the drug for a "cooperative in Las Vegas".

However, Fleiss had failed to obtain a licence to grow the pot for medical purposes and now she is facing multiple charges, including possession of marijuana with intent to sell, possession of drug paraphernalia and maintaining a home where drugs are sold and/or used.

Fleiss, who was "very co-operative throughout the investigation", was not arrested during the incident, reports