Ahh need help with my indoors

Hi I am a beginner at growing, my plant leaves are turning colors and crunchy dry. heres some pics. can anyone tell me what is wrong with this plant?

i'm using miracle gro soil. and its inside a ventilated closet

go to the general marijuana grow section . . there is a sticky post on top that tells u all of the deficiency problems depending on the color of the leaves. . that should help ya.