Very simply you could buy miracle grow or something 20-20-20 or 5-5-5 (as long as all 3 numbers are the same) for grow and 10-20-30 or 20-20-50(or similar ratios, more the last number than the first two) for bloom, but I really recomend looking into some grow guides, the good ones will really help explain what to look for. There are some higher grade fertilizers and feed more preferred for cannabis and looking into those after reading up may sound like a good idea. If you do buy from a store remember the bottle recommends way too much for the plant and will burn or kill it, so dont feed too much to begin with(1/5 recommended), build her up to recommended levels. Hope everything gos well with your grow.
