Fertilizer N-P-K

While I was doing research on how to grow I read up on a couple of fertilizers that some sites mentioned on their grow guides. This is going to be my second grow the first one not being succesful. On my first grow when I was doing research I read up somewhere that 20-20-20 is good for the plant during vegetative growth. Now on my second grow while I was doing research on grow guides I read on greenmanpage.com that GROW MORE 20-20-20 is good for the plant during vegetative growth so I bought two 2.5 LBS packs on a site I found. Today I was doing more research and read up on a couple of sites that during vegetative growth the fertilizer should have roughly twice as much N as it does P and K. Is this true? Should I dispose of the nutes I have now and Buy some new nutes with twice as much N than P and K or is 20-20-20 good for vegetative growth?