Y'all have any ideas what this could be? The leaves on this auto are the only ones curling and have brown dried areas. I did notice on 2 of the photos that the inside of stems have a dark streaks. I have a couple of thoughts on what it may be but wanted some advice. I do think that my ph water level was way low at around 4.7 about 10 days ago.I corrected it with the last feeding last Sunday. Another thought is that the auto is now flowering and didnt use the correct nutrients, Super thrive foliage pro which has hight nitrogen. I corrected that by using Groteck monster bloom on just the auto. All the brown leaves were mostly at bottom of plant and on th bigger leaves.