I've done both. But there several things to take note on such as - everytime you trim it shocks the plant slightly and stops growth and takes about 24-72 hours to recover. That stunts plant growth slightly. But you will be able to grow a few more plants in the same area. Letting the plant grow without trimming grows a fuller plant and budz. If you are going to clone then take them a week before the start of flowering. You can take clones 2-3 weeks after flowering but you will want to extend your flowering period about 1 1/2 weeks. The best thing to do is what you want to do or try. That way you see what works best in your garden. Also, I find it very helpful to keep notes every day every crop on feeding and things done and tried. When 1st starting out its good you ask questions , it gives you a basis to work from but it's bottom line is trial and error and your decisions.