i have mg 15 30 15 fert which i used in vegatation and now i am starting flowering. I also have mg bloom boosting fertilizer which is 10 52 10. Is this a good flowering formula or should i mix both fertilizers together to get more nitrogen and pottasium

DONT MIX. It could cause a toxic salt buildup. Just stick with the flower for the most of the flowering phase. Then at the end use the booster, then flush.

So shoud i stick with the 15 30 15 or the 10 52 10??

15-30-15, but start off 1/4 of what they recommend, and work your way up. Also dont fertilize every watering, do it every other at most. At 2 weeks before harvest feed with the 10-52-10 at close to full strength, this high P will encourage your buds to ripen evenly and faster. Lamp