Anything high in nitrogen which corn needs in fairly large amounts (corn is related to grass). The brand isn't particularly relevant. In fact you could just work a bunch of cow manure into the planting area instead of buying an actual fertilizer if you are so inclined.

There are also organic and synthetic granular type fertilizers that will last awhile and these are usually mixed into the planting area and then a top dressing a month or so later.

when u say cow manure do u mean fresh or store bought stuff that comes in bags??

Either way although right from the farm is going to be higher in nitrogen. If getting it from a farmer it is best to let it sit a couple weeks if it hasn't sat awhile on the farm otherwise it can be too 'hot'.

Steve -- last year, I bought some bags of Bayer Advanced timed-release (3 month feeding) fertilizer on clearance for $1 for a 14 pound bag. I actually had several formulas -- a tree and shrub, an all purpose, and an azalea/camelia/evergreen formula.

I used some of the tree and shrub, which was 21-3-12 (or something along those lines, it was 21% N) and some of the all purpose, which was more balanced. I made three applications by broadcasting on top of my black plastic and then watering in heavily. Mid-July, early July, and mid-late July.

I had faboulous, fantastic corn with great big, well-filled ears. It really liked all of the nitrogen and the fact that it was time-release and gave continual feeding.

Corn isn't that fussy, as long as it has higher nitrogen and some P and K, along with some minors and trace elements if your soil is lacking. Really, ANY fertilizer that fits this profile will work, the key is just to get it on there at the appropriate time -- when it's about 6 to 12 inches tall, about 2-3 feet tall, and again just before tasselling.