Any Idea What's Wrong?

These leaves are from the bottom of the plant . I ws thinking maybe just the new growth takes nutes ect from the plant or is it lack of Nutes ? I really dont use nutes only thing i give my plant is the dreaded MG 8-7-6 and some Superthrive . Im afraid to nute burn nd overwater the plant so i do it in moderation . Plz any advice is great Thx .. !!! Its a outdoor plant , was not a planned grow . Prolly prolly bag seed . joint:

well if its from the bottom thats normal bottom leafs always fall off