Auto blueberry Nutes NPK ????

I bought all the stuff to get ready for growing the (auto Blueberry) but...still i didnt found the correct nutes (grow+bloom) i went to several stores to buy these but when i check to the NPK still complicated for me i dunno wut to buy cuz im worry i dont wanna ruin my plants ..so plz tell me guys do i really need the nutes? If sadly i do which kind NPK i choose? :/