Leaves are Yellow!

Ok So im in the 2nd week of flowering and just wanted to know if I should do anything. Some of leaves at the bottom are turning yellow. Actually they were already yellow and some are turning more yellow. The new leaves are looking good. What does it mean when the bottom of the plant the leaves are turning yellow and falling off. Someone told me don't worrry as long as your new leaves are good. Is this true? Any input


thanxs

if it is just the bottom leaves that are doing it and top leaves are fine then it is most likely that the dieing leaves are do to the light not penetrating through the canopy. should not be much of an issue but what kind of setup do you have? mainly light and such