Even cannabis products which are lab tested and sold in dispensaries can develop mold. Temperature, light, humidity and air circulation all play a role in the development of mold. It is harmful to ingest moldy cannabis. That is why it is crucial for all medical cannabis patients to be able to identify mold on their cannabis products. In this article I will define mold, give examples of mold common to cannabis, explain why it is dangerous, how to identify it and give tips on how to keep your cannabis mold free.