Yellowing leaves HELP!!!

[Budman10]

ok i have a problem but i have no camera. i will try my best and explain the issue. my oldest leaves have turned yellow and dying what could this be??? my newer leaves are great just the older ones.thanks

 

[apasunee]

we need a LOT more info about your grow,,, and how old is your plant among lots of other missing info......;.......

 

[Budman10]

i have an aluminum foil setup the grow box is an aluminum foil setup and stays aroun the 90's consistantly. im using miracle grow all purpose nutes. and im growing with a CFL.

 

[itrustme]

ok i have a problem but i have no camera. i will try my best and explain the issue. my oldest leaves have turned yellow and dying what could this be??? my newer leaves are great just the older ones.thanks

when did this start happening.