help

So i just flushed my res and im using miracle grow bloom boost only because it has all the secondary nutes.....now though one of my plants has a lot of yellow leaves that are yellow around the edges and green in the middle indicating maybe a potassium deficciency? Or zinc maybe i mean they are 5 weeks in to flower is yellowing normal at this stage my buds arent that big either...what do i do

Could use pics and more info, what's your system, medium,lights etc.?

let it play out. If your not sure, then watch the plant and see what it does. Even if you don't get huge buds right off the bat you have some experience under your belt.
You haven't included enough information for most of the knowledgeable guys on here to respond. you need to tell your Ph, what your growing in, strain, bla bla bla. You also have no pics.

Yeah im doing this from my phone rite now so sorry theres no pics my ph is 5.9 my strain is NL special growing hydro and im using miracle grow bloom boost which i know isnt the best stuff ill put pix on manana

Pictures please.

Heres a picture