A little Nutrient help please?

Ok so my plant is about 6 weeks old now and i have only been adding a very lil bit of a basic plant food that i bought from home depot that was something like 20-08-08(forget the exact #'s). My plant has been doing pretty well off of that but i wanna use a better nutrient for the flowering stage to get the best results. After doing some research i found out that the N and K are the most important nutes for the flowering stage. So I was thinking of buying this High Tech Garden Supply but i wanna get some opinions before i put something into my baby.
So would that product be good for my plant. Why or why not, and if not could u reccommend a better product that is around the same price range.(under $30. yeah im broke)

Thanks to any help.

it will do fine

I like the Botanicare Pure Blend Pro for SOIL myself, make sure you don't get the wrong one. Also, i've used the PBP grow for veg. too and it works great as well.. High Tech Garden Supply .. it's the 5th one down. I also usually feed them some Cal-Mag nutes every feeding from veg. through flower.