Get some roots organic. Even if you have to order it (ordering soil is expensive) it will pay off for you in the end. I started in roots organic and for veg, all I needed to do was add water. No nutes, no ph adjusting, just set the water out for RO and pour it in the next day. I just switched to flower and my girls love it. I did 1/3 of the pot supersoil, and then I made a small buffer layer where I mixed the roots organic and supersoil, with another small layer of pure roots organic on the top. I then transplanted my plant on top of that and filled the sides with just roots organic. I've continued to use only RO water and she hasn't showed any deficiencies that I can tell.