Canna nutes autoflower advice

Hey, i don't know that type of nutrients, what i can say is you need to search what are the nutrients for, vegetation or flowering, then if it is to vegetation you can already start using by low doses and then go increasing as they get higher because they will need more nutrients then when it's getting to flower you reduce the nutrients and if you want you can flush them (only with water) in the transition between vegetation and flower and then it's the same process to that phase. I normally start at the 2 week of vegetation with low doses.