this was my first time growing, i decided to use k2 seeds i had 7 plants growing in a huge tupperware wrapped in aluminum foil, under a 450watts (hps) i was using mg soil and it seemed like i was burning the dirt i had the light about 12in away, and the plant was in one of those small steyrophone cups i watered it everyday but nothing came of it and the top of the dirt looked burnt ima start over but what did i do wrong please help thanks