I am using GH 3 part with the lucas method (0-1-2) and am 25 days into flowering. I was thinking about adding some Kool Bloom, Gravity Hardner, and/or purple maxx. My question is - how does one know how much to add? It seems like the recommended nute strengths are always too strong. Does anyone know a general formula for calculating how much NPK we should be using? I would like to enhance bloom without overferting. Thanks for the help!
