I'm going to be using Pro-Mix Ultimate Organic for my future grow: http://www.menards.com/main/lawn-garden/lawn-plant-care/pro-mix-reg-ultimate-organic-mix/p-1509488-c-10116.htm It alone contains: Canadian Sphagnum Peat Moss (65-75% by volume) Sea-based Compost (from composted shrimp shells & seaweed) Limestone (for pH adjustment) Perlite Mycorise® - endomycorrhizae inoculant Does anyone recommend I use any additive nutrients, has anyone used this for a grow?