Hey there JP, can't say for sure because there's no info on which ferts you're using , but what I can say for sure is that , no, usually with autos I don't use any ferts until flowering , using veg ferts throughout will mess up the NPK ratios in the soil and hinder the flowering because of too much N. However with some if not most bloom fertiliser it's ok to mix and match with a 1/4 to 1/2 dose of veg ferts to give it that extra N or "balance" the NPK ratio. What you don't want to do is end up with a 6-2-2 ratio when you should be at 2-4-4 npk . Does that make sense ? Hope this helps ! š