what brand are you using in veg? you dont want to cross venders to much. and what type of strain you growing. i ask cause my blueberry has diff needs than another strain. you want less n. here is a guide to show you from fox farm. you dont have to use there's but you use as a guide and go check out what is in there's and adjust to yours. and be careful start at 1/2 strength. and flush it every few weeks to clean it out.
Peace and Love