I have 4 Nirvana Northern Light plants growing 2 are 12 days old and the other 2 are only 5 days old. For now they are vegging under 2 CFLs and the temperature is kept around 70. I have not started to use any nutrients but i am using the miracle grow soil with 3 months of nutrients in it which i know is not a good choice of soil. But my plants are starting to show problems. The leaves are gettin yellow and brown spots and some of the leave edges are curling uppwards. Is this nute burn from just the nutrients in the soil? If anyone could tell me what the problem is and explain how to fix it thatd be great