Almost anyone who has started growing on their own, has used or heard of him at one time or another. Ed Rosenthal’s “Marijuana Growers Handbook”. It’s a good starting point.
I’m not sure if it relates to your location, because in some places, outdoor growing is best done in grow bags of media or hydro, but if you live in a place where people grow in the ground, the study of soil management can be a lifelong endeavor.
I absolutely agree. It took me 4-5yrs to be able to grow product I thought was worth a damn. I went the trial and error route. Learning from my own expensive mistakes.
The people I have helped in that department are turning quality crops from the beginning.
Maybe I’m the only one, but I’ve had The Cannabis Grow Bible: The Definitive Guide to Growing Marijuana for Recreational and Medical Use for ten years and still refer back to it. There’s no substitution for experience, but it’s helpful to have a reference guide to thumb through. Then whatever doesn’t add up from the book, use the search bar !