Northern Lights Auto First Grow

There has been some good growth from the plants this week. I started low stress training on Day 30 and the plants have all responded well to the training. I fed the plants once this week at 1/2 strength that Professor Nutrients recommends for week 4 plants. I have not been able to be as attentive towards these plants as much as I would have liked which has resulted in me not being able to read my plants carefully. There appears to be some discolouration on the leaves and leaf tips which may be a sign that the plants are not doing so well. I will need to do some research on why this is occurring and closely monitor my plants over the next week to ensure that these symptoms do not progress throughout the whole plant.