If you are running the canna nutrients, which it sounds like you are, follow the feeding instructions found on the company's website. It's meant to be run as a complete nutrients system.
The only other thing I would say you can boost them with is a little molasses, about a tablespoon per gallon, which won't interfere significantly with your normal feeding schedule.
stinkyattic Reviewed by stinkyattic on . extra boost i feed my plants with some normal feed and pk13/14 them a week before flushing them but can some one tell me whether i could boost them with something else whilst they are in bloom Rating: 5