CBD 1:1 Silver Lime Haze Auto

42 days from planting seed. This week 3 of my 4 plants are now flowering. The runt appears to have stopped growing, not exactly sure what has happened to it, maybe this one got affected by the cold temperatures I was having problems with early on. it is only 12 inch tall compared to 21 inch of the biggest. The other three are looking good, 2 measure at 21 inch and the third is slightly behind at 18 inch. All three look healthy. No changes to my setup this week other than moving my light up a couple of inches. Still have the rhizotonic in my reservoir but will not put any in the next mix but will increase my A & B to 2.5ml per litre.