Umm, 30min isnt that bad of a drive if you want to grow good pot. If you are going to invest about 3 months of your time and money into this shouldnt you do it the very best you can? Why would you want to go to walmart and buy something that simply "works". Dude, suck it up and drive 30min. When you get there dont say you're growing weed (im sure you know that) But its kinda an unspoken rule in hydro stores that they know what you are growing. Just asking them for something for veg phase and flowering phase. They will give you what you need. And if you are growing soil a must buy is CalMag Plus by Bontanicare (ask for it) This prevents calcium, magnesium, iron, and alot of other defiencies which are almost always present in soil. As far was brands i use Earth Juice and Botanicare Pureblend series cause they are organic and work very well. Just ask the person at the store for help. It will get you started then you can buy other stuff as you need it. Like microblast, superthrive, tiger bloom, etc. (Stuff thats not necessary but help tremedously) Dont get stuff at lowes and homedepot, its not for growing weed. Stuff at those places are almost always chemical fertilizers. I dont want to smoke that stuff, do you? And you will almost for sure burn your plant up being so new. Its almost impossible to overfert with organics. Just go get good stuff dude, you wont regret it.