As a serious grower, you need to recognize that the process of promoting optimal growth of a plant is similar to conducting a symphony orchestra. Your job is to bring all the various instruments (environmental conditions, nutrient levels, lighting variables, pest and disease control, etc.) into perfect harmony. Easier said than done! And to complicate the picture – there is no one right way to do things. You can successfully grow in soil, or soilless mix, or rock wool, or clay pebbles or hydroponically. You can grow “organically” or using conventional water soluble nutrients. You can use HPS lighting or LED or ceramic metal halide. You can grow indoors or outdoors. All can be successful IF – and this is a big IF – you properly choose the supplies that are meant to work together and you properly apply them.