Looks like you had a bit of a phosphorus deficiency that later cleared up when you started using nutes. If that is actually the case I would question your soil as the plants were way to small to be having that problem at that time
This to me looks more like over-fertilizing. For me the best is 1 fertilizer 1 water. Much water and a revive/root solution after water or with the water i think it would be great. Anyway as i see them is no reason to worry. It looks like you will have a great harvest!