CustomGrow420 is a YouTuber who vlogs about cannabis. He himself says he harvests it for medical purposes, and in exchange, teaches and entertains his viewers by smoking it, usually with his plethora of water pipes. Outside of YouTube, he lives with his wife and three children; he is a stay-at-home father.
He made some cameos in the Filthy Frank Show, most notably in one of Frank's songs. His cannabis-influenced yell is usually seen paired with a picture of Jon Favreau. Unlike many of the characters on the Filthy Frank Show, CustomGrow420 has not had any outside influence on the Filthy Frank Universe. Indeed, his only physical appearance has been in a song during LOSER READS HATER COMMENTS 3. Because of this, it can be argued that he is not even a character. However, he is technically still categorised as a character, as Frank is seemingly aware of him, and must exist in the Filthy Frank Universe, as his voice has been heard multiple times.