Seems like old soil, poor feeding and PH imbalance have causes some lower leaves to die.
I belive they will be ready in another 5 weeks altough i am concerned about size, specifically what to do with the difference in height required to keep the light at 30cm/1 foot from the tops on the right and left side
@Mr_Juice, yes i think its a combo of ph imbalance and nutrient deficiency, only started giving them nutrients last week because i mixed worm casting in the soil