A problem that's getting on my nervs

Guys I'm new in growing and I'm trying to grow some in my room I have 5 plants and all of them have the exact same problem.Their bottom leaves turn yellow and after time they dry up....I don't have and have and use any other accessoryes then pots for light I use sun light my soil has some fertilizer in it and that's all.

Lower leaves yellowing is nitrogen deficency.

sunlight thru a window sill wont cut it...if u cant get lights i say plant them outside...good luck

I'd be very glad if u can tell me how to "fix" this nitrogen deficency ? (I'm very new in planting I need some serious help and it's allot harder than smoking god damn it... :] )

thank you so very much :]

hey man listen
for this stage of growing u need nothing but water and sun light or other kind of light
if u r using sun light u need at least 5 hours of direct sun light.
i am growing out side and i didnt have this prob cause i gave them at least 5 hours in not more.
and dont use fret at this moment use it in a couple of weeks
i hope that have helped u
have a puff puff day