Ah, new to forums. Reminds me of myself just a year ago or so. Now I feel good that I can share some experience and lessons taught by fellow RIU members. I myself used miracle grow for my first and I did make the mistake of putting nutrients. (I have advanced nutrients) My plants took a harsh beating from that + the nutrients already in the soil. So a month - two sounds bout right. No nutrients until then. Earthjuice is good if you're into organics. Advanced nutrients... It has a lot of additives so I don't exactly trust it but I use it and it works. Just keep the plants growing under the lights you have and they'll thrive.