Nutrient advice!

I will be in my 2nd week of flowering tomorrow, the nutrients I'm using are gh micro, grow, and bloom, calmag, super b+ and sm90. The hydroponic store guy told me that when I start my second week of flowering I need to come get this stuff called bud start? This chart he gave me you only use it once for one week. My question is should I def go buy this since I would need it tomorrow before I change my hydro solution, or does it not help very much, I will def be using ton o bud, and the heavies just didn't know if anyone in here used it just need some advice cause the hydro store is like 30 mins away and I don't have much gas money haha
 
Top