I'm glad I looked into this rather old thread, but I found a lot of great tips for growing good cannabis in my greenhouse in Maryland. In my opinion, the quality of cannabis seeds, as well as the variety chosen for a given climate, play a very important role. I used to have experience growing cannabis and now I want to buy some of the best strains for the local climate from this online shop https://herbiesheadshop.com/cannabis-seeds-usa/cannabis-seeds-maryland. By the way, I plan to use dried cow dung as a fertilizer and plant the seed directly in the same hole.