MarcXLanswered grow question 5 years ago As you use different nutritions from different manufacturers, it´s hard to tell cause every company has its own schedule for applying nutes.
But normally you can start adding bloom nutrition one week after switching to 12/12. And during that timme keep on adding your grow nutrition till you see first flowers.
Adding P/K is normally recommended from 4th week of flower. Before that your bloom nutrition should provide enough phosphor.