I read a book, the famous 'Growing Guide' by Ed Rosenthal and Mel Frank ... then, I put potting soil into 8" clay pots, a couple fluorescent tubes, some diluted Miracle-Gro once a week, and grew gorgeous plants ... no problems, no concerns, just by 'reading a book' ... (that's why I lose my patience sometimes with questions posted, when the answers are all over the page, already) ... :smokin: