bud booster

how well do bud boosters work,are they worth the money, and could u use them in week 6 of flowering. Any info welcome

I've never not used one so I can't say. week 6 would be ideal to fatten up your buds, a little late for increasing flowering though.
I use Alaska Mor Bloom BTW (0-10-10)

i use canna boost the whole way though flowering you could use it now but i dont think you will get the full potential i have seen a clear difference when using it, now when it comes to how it works i have no clue but i know that it does work so i dont care

Also depends on how long your flowering cycle is for the particular strain you are growing, when I grow indica's I am starting my flush at around week 6-7. When used properly I do believe they work.