How big of a plat are you thinking of?

I ordered a sample pack from Whitetail institute that came with a ton on info and a video on their products. Their whitetail imperial clover is blended to provider roughly 30%-35% protine through out the 200+ days of antler growth. It wasn't particuarly cheap $144 for a 25lb. bag but I think that will plant in excess of 5 acres. They also have smaller bags 4lb that cost $36 and cover about an acre. the good thing about the clover is it is a peranuial and will last for up to 5 years.

They got other products as well. The sample pack I got was free but I had to pay for shipping.(not really free) But it came with lots of info on food plots.

http://www.whitetailinstitute.com/products/samples/