These two are my favorite The Periodic Effects The Cannabis Business and Science Podcast Shaping Fire Shaping Fire
I just caught this one with him and thought it was really great. Episode 32 - Dead Bodies and Poop with guest Tad Hussey
Cannabis Cultivation and Science Podcast ^^^The only one I really listen to so far. Ill check out the others.
Also, anything with Emma Chasen is great. She does a podcast called This Is Cannabis with a guy named Lee Henderson and it's also fantastic.