Bubba kush feminized from Seedsman. It's in it's third week since seed. I am using main-lining combined with LST this time. Some of the new growth leaves are looking fully dried. I first noticed it during my 2nd topping, I went ahead and topped anyways and defoliated the dried up leaves. Again saw another leaf that's kinda shrivelled up. It's the new leaf that's showing this symptom, the older fan leave are looking healthy. Need your suggestion please.