Yellow/Brown Crispy Lower Leaves

Old leaves do die off, and you have already given her a feed so I wouldnt worry, just dont go crazy now and over feed her, but she will need light feedings from now on til last few weeks of flower as she is trying to pack on the bud now. As the plant ages the old leaves die off no matter what you do so relax- its normal ok.

Most of the lower leaves die off because they start getting too shaded by the leaves above them and is normal in a system where the light is fixed in one position and quite often not an indicator of anything going wrong, it is just not getting enough light. Picture 3 looks like damage caused by the leaf hitting the wire or edge of the pot when the fan blows on it, most likely at night when the leaves are lowered. I would also be removing the humidifier now that your plant is flowering, the risk of mold is high and plants produce more trichomes in an arid atmosphere. Otherwise your plant looks quite happy and healthy. It is also good to see a plant that hasn't been violated with defoliation, therefore she is producing maximum energy which equals maximum growth! I advise all growers to only ever remove yellow leaves, for by the time they are yellow, they have served their purpose! Hope this helps, Organoman.