Which Canna Coco nutes do I need?

Hello guys, about to start my first Coco grow Hempy Style, and Im wondering what Nutrients I need From CANNA?
Right now, I have Canna Coco A and B, and Rhizotonic.. What else should I consider getting? I also have Cal-mag if needed..

Also, Should I feed 1/4 strength nutes right when the seedlings pop out of the ground, since the coco has no nutes for the seedling to feed on? or do I wait for a while? If I do need to start feeding when they pop up, what should I give them?

thanks alot