The thing is its not a properly controlled grow room, the plants are about 2 and a half inches....about 1 week old.....only got one set of leaves after the seedling leaves.......the ph is fine and the tempertures are 75f -80f.......mixture is 1 pat sand, 1 pat vermulite, 2 pats organic oil mixture......the plants look healthy enough but it is turnin a slightly lighter green towards the tips of the leaves......