Canna Nutrients and additives.Please Help :(

Hello Rollitup!!
I am growing 5Auto strains in 53day with a real mind confusion with my schedule..
Here my nutrients schedule:

Canna Boost 40ml per 10L
Rhizotonic 5ml per 10L
Cannazym 20ml per 10L
Canna Bio Flores 30ml per 10L
Canna pk 13-14 15ml per 10L

Girls growing very slowly so i'm thinking maybe doing something wrong?
I need your help.!?

auto strains do stay smaller than the normal version. If it's a 8 or 9 week version it should be ending its life cycle soon. Perhaps flushing till harvest will help.