yellowing leaves

Looking at your plant its recycling the nutrients that it has already processed. Lower canopy leaves that do not get a lot of light will do this as the plant is moving nutrients to a more useful location. If you have lower leaves that DO get light and go yellow then it is a nitrogen deficiency. Be careful on how much nitrogen you add to a flowering plant as it can cause the buds to have more leaf then desired. Once a leaf is fully yellow you should remove it. Rotting(brown) leaves can cause fungus issues and attract unwanted bugs. Happy Growing

I don't think you have anything to worry about. The rest of the plant looks OK. I would pull them off now. If any others start showing problems then re post on questions again.

No reason to worry, thats looking perfectly normal, the plant is just deciding to remove leaves that are not really relevant anymore/not receiving light. Pick them off and throw it out. Happy growing! :)

Ola amigo, Eu normalmente não me preocupo muito com essas folhas. Porque as folhas de baixo que não apanham luz acabam por ser inúteis, e acabam por ficar amarelas e cair. Mas isso não e um problema. Ate podes remover todas as folhas de baixo que não apanham luz. Boa sorte no cultivo e abraço