Hi all 1st time at this I planted barnys farm blue cheese 4 weeks ago agter germanation plants only around 5-6 inches tall but wide is this a bormal height ? Also using coco soil and coco a+b fertz says to use 40ml of each for 10l of water this seems like a small amount shout I be using this every time or every other currently fertalizing after 2 times watering thanks in advance