I would run the veg nute to the start of week 4 from the flip. Then start the Bloom foods.....You didn't say what bloom food your going to use......I would look out for anything over a P value of 4 till week 6. In synthetic grows I will spike the P&K with a booster of 0-7-5 once at week 6 and again once at week 7. No big blaster numbers like 0-52-34 are worth while for the most part.
I really like the "booster" from Ionic. It seems real clean and low salt. Sometimes I'll run the spike at full strength once and then straight water then spike at 50% and water. Then repeat at the 7th week.....I do water a metered amount everyday so that it's dry and ready for more at lights on the next day, adds plenty of O2 to the roots.