So I would recommend doing a bunch of research rather than trusting a single source. The guy that founded ILGM (who has his name right on the site) is a chemist with no background in horticulture. His youtube channel is full of short videos that are either strain reviews, quick overview of how medical cannabis can alleviate certain medical issues, or "grow journals" which are just picture compilations of some plants growing. He uploads incredibly often, suggesting he doesn't put time into the videos. There is almost nothing on his channel about growing weed. To me this guy seems like your typical asshole trying to cash in on the cannabis industry while having no experience in the matter. No wonder this guy says to use miraclegro, he has no idea what real horticulture is.