EXCLUSIVE

CNN not updating Pringles' profits? MSNBC missed the latest ganja crop report? The National Marijuana News is launching to fill that void, and capitalize on the expanding marijuana culture ... TMZ has learned.

The honchos behind the NMN tell us they plan to be the first legitimate news source covering medical and recreational marijuana ... including new laws and advocacy movements across the country.

We're told radio legend Bruce Kelly will host the hour-long program -- and Tommy Chong and Adrienne Curry will have some involvement (expert testimony?) ... and producers have reached out to Whoopi Goldberg and Snoop Dogg too.

We're told the NMN will be syndicated over multiple online platforms -- including "Live365" internet radio and USTREAM.