Yellow withering leaves with brown edges

Hey there! Your Afghan Pearl, CBD automatic looks to be experiencing a nitrogen deficiency. Coco coir doesn’t provide nutrients, and the soil is likely depleted by now. Since it’s an automatic strain, the damage is probably already done. Slowly adding fertilizer might help increase bud production a bit, but there’s not much else to do at this point. I recommend fertilizing your plants every time you water them. This makes a huge difference in maintaining nutrient levels and overall plant health. Safe bet is always to take a nutrient plan for your week and half it. Good luck with your grow!