I'm thinking about starting my first grow, i'll be buying 3 feminized white widow seeds next april or so and i want as prepared as i can by then. I have a few questions. 1What kind of potting mix should i buy? 2. When i prepare the soil, what season and how do i do it? Do i just dig a hole and put the potting soil in? 3. How often should i fertilize? 4. How often do i need it water? I see videos on youtube about feeding their plants 1 gallon on the first day, no water, then another gallon and they do that twice a week?