The plants should be on about 1.4 at week 4,honest cut back on there full range it is not needed,unless you come across a problem,the shops selling you this stuff will advice you use there full range,because your spending more money ,but trust me it is not needed,your next grow use a/b,and big bud from advanced and pk 13/14 that's it and I send you a feeding schedule that is so simple ,but you get great yields .rhizatonic is worth having around just for the first couple of weeks after rooting .
They should be getting ready to hit them with the pk 13/14,this will make them swell big time,it's the best stuff I have ever used,well that and overdrive,for making the plants fatten up.I have done a grow kinda competion with a friend ,he said he would beat me using the full line of canna nutrients,we both stick to the same ec through out the grow,I beat him by 4 oz,