If you are going to take the effort time and possible risk if illegal then you should KNOW WHAT YOUR GROWING. A seed bank will have photos and info about yeld and flowering time. With that information you can make the choice of the best strain of plant to use. Buying hemp seeds from the back of some pet/animal/plant store you dont have any idea at all what your going to get and how good. Those may not even get you a buzz at all, you would be better off to plant seeds out a crapy bag of comerical swag atleast you know it will get you a bit of a buzz then. Still your better choice is a seed bank or a fellow grower that can get you clones..