Check with your county's USDA extension office or the Ag school in the state in which you. These are great sources of usually free info.

You cano optimize your $$$ by purchasing a food plot crop that is ideal for your area ..... for example, alfalfa is a poor choice for as far south as I hunt, while some of the warmer weather clovers that work great here are a waste of $$$ way up north.

The best blend that we have found for here in SE Alabama costs us about $35 - $40/100# at a local farmer's co-operative. The varieties are all recommended by Auburn Univ. for planting game plots in SE Alabama. It contains 30# wheat, 40# forage oats, 20# grain rye, and 10# clover to which we add 1# of turnip. We plant late September.