What are you talking about?
What I mean is using organic matter (like dead cannabis plants) as it does so many wonderful things for a garden, it’s just silly not to take advantage of it. There would be no organic gardening without organic matter. Decaying organic matter is how plants are fed in nature. Unfortunately we’ve become very tidy landscapers and we tend to remove any dead plant material that falls onto our lawns. It would be so much more beneficial to allow the fallen leaves to be buried over time, where they will not only feed the soil, they also prevent erosion and mulch the soil. Organic matter added to garden soil improves the soil structure and feeds the microorganisms and insects. The more beneficial microorganisms your soil can support, the less bad organisms will survive. The good guys feed on harmful microbes like nematodes and certain soil born diseases. They also release their nutrients into the soil when they die. So the more beneficial microorganisms that are in the soil, the more nutrients will be in the soil. And many types of organic matter add still more soil nutrients to the mix.
Organic matter also contains acids that can make plant roots more permeable, improving their uptake of water and nutrients, and can dissolve minerals within the soil, leaving them available for plant roots.
I did not mean you should use your dead cannabis plants as the sole fertilizer, I meant using them as additives to an organic garden because it can be very beneficial if applied properly.