My girls are 4 weeks old and getting yellow tips. I started LST 2 days ago and one of the lower branches wants break at the base ...not sure if plant is healthy or not. all looks good but her stalk seems thin and fragile. Usually veg is smooth sailing. I have my lights at 22"now they were at16". I just started feeding them with terp tea, only 1 dose at half strength . hard to see in photo but tips are yellowing should she be pointing up so much ?