First Grow

Being bag seed I would keep a close eye on the sex when they start to show, last thing you will want it some boy messing things up. It will be awhile before they show and you have a alright amount of summer left. I would try and get them into their final container once they get to 4th or 5th node, if it was earlier in the year you could step them up but every transplant is a few days lost of growth. I would stay away from slower release N because they are only going to get around 6 weeks of veg before they transition and you will not have as much time as compared to a full summer to burn through your N supply. If your going organic with ammendments mixed in ahead of time make the soil ASAP so it can atleast cook for awhile before you transplant. If you use bottled nutes this is less of a concern organic or synth. I would also use this time while they are getting bigger to iron out where you will place them taking into consideration the path of light, security (if needed), and how to protect them if weather is an issue in your local.

 

They do not need much right at the beginning, eventually some N for fresh growth and some K for root development. I would not burn to much of your funds on over priced food something simple like basic Earth Juice grow/bloom or even the Hi Brix part A/B (which sometimes is cheaper than basic and better IMHO). Or if you want to go synth running general hydroponics "2 part Lucas Formula" is a cheap tried and true method although will require monitoring pH where as it is less important with organic based EJ lines. Another option if your confined to big box store products would be some organic dry mix a bag of something along the line of Dr Earth Tomato, Vegetable, Herb (4:6:3) to start with and then top dress with some like their Bud and Bloom (3:9:4). The stuff is pretty cheap, omri and can usually be found locally. I use stuff like that for overwintering plants (all sorts) when it is hard to cook up a batch of ammendments because of temperature. I also use it for mother's or any clones I am holding for later use. Really depends on which route you wish to go. I personally mix my soils up to contain everything they need in advance to save myself time so I can concentrate it in other aspects of my garden, although I will use mixes and bottle based stuff as touch up or to encourage transition.
Something like this is arround $10-$12 for 4lbs at most hardware stores.
Organic Fertilizers | Doctor Earth
The second portion would be soil, containers, and accessories. This is an area in which you really do not want be caught short, it sucks to have girls ready to move over and not having a batch of dirt ready (in my case) or money to pick up premade soil to fill your bags. Also depending on your local not having the stuff on hand to protect your girls if the weather shifts and not having what you need immediately either because of funds or maybe simply you can not find something locally. These can make a bigger difference then the food you use if a cold snap, or a storm takes out your girls.
Personally I am in a situation where I need more irrigation parts for my vegitables, if I could set up 200 more emitters I could save myself 1.5 to 2 hours a day on just watering. Probably won't happen until the end of the month and I have exhausted all the stuff I had on hand. I sometimes run out of ready soil in the spring but I am reaching the point now it is becoming less of issue and usually have a stack of basic components on hand. I guess what I'm trying to express is that alot of the little things can be much more important than getting some 8 part super food which the grow stores will tell you that you have to use to get excellent results and this is amplified if you find yourself in a position like me where you wish you had more funds to spend month to month.