Yellow Spots On leaves whats goin on?????

just check my closet no to long ago and started to notice these yellow brownish spot on my plant. View attachment 2142783View attachment 2142784View attachment 2142785. could someone anyone please tell me whats going on and what i can do to fix the problem. im a rookie with no clue what to do. help!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

p.s. does this mean its time to start adding nutes???

What are u growing mate (strain) and what are u growing in ???