While I'm sure if someone knew alot about gardening and nutrients there would be much cheaper ways to provide nutes, however I don't know anything more than the cannabis basics. Around my parts General Hydroponics 3 part is the most popular. The 3 part solution is called the Flora Series it comes in 3 colors. There are instructions on the back of the bottles that tell you what proportion of each to use during each stage of growth. GH also offers an organic version of this, never used it, I think it might also be 3 parts.
http://www.generalhydroponics.com/genhydro_US/floraseries.html
If you are using unfiltered tap water don't be afraid to start by using much less than what the instructions say, and would reccomend using it only every other watering or so. I use reverse osmosis water so I also use a suppliment called CaMg or Cal-Mag that puts back some of the good stuff my filter took out. Another benefit of this stuff is it seems to take my water PH down to about 5.8 to 6 so I don't have to PH it for watering. I hear mixed reviews about whether or not Cal-Mag is necessary or not.
http://www.generalhydroponics.com/blog/2009/06/23/general-organics-camg/
This is a link to the feeding schedule and what qtys to use. I personally don't use floralicious Plus, but I do use the Liquid Koolbloom.
http://www.generalhydroponics.com/genhydro_US/feeding_charts/GH_KeepItSimple_DrainToWaste.pdf
I use this stuff called Mykos when transplanting. It's a granule you put in the root zone, supposed to help it root better. I put a little when I initially plant my clone, and a little more when I transplant to a bigger pot. Available at hydro stores and elsewhere:
http://www.sears.com/shc/s/p_10153_12605_SPM4695006201P?sid=IDx20101019x00001a&ci_src=14110944&ci_sku=SPM4695006201
I also use SuperThrive. It might be a gimmick, but I also use this when transplanting. It's supposed to lower stress or something. But it only takes 1 drop per gallon, so a 4 ounce bottle is supposed to be good for like 2000 gallons. Its also super cheap, ive seen it at English Gardens for as low as $6. Also available at the hydro store, probably closer to $10.
http://www.sears.com/shc/s/p_10153_12605_SPM4695004901P?sid=IDx20101019x00001a&ci_src=14110944&ci_sku=SPM4695004901