Bio Flores

I have noticed a pattern of deficiency of nitrogen when only using this line of nutrients. In Canna coco coir and black gold perlite. I love the line. I found that adding a supplement with more nitrogen fixed the plants, I wanted to be sure, so this was repeated with 3 grows so far. I can only conclude that there is a slight imbalance with either BioFlora (most likely) but i use all the available BioCanna products. It could be my fault of course. anyone experience this?