Food plot question

[geno]

I pick up a dozen or so seeds off the seed loading dock the other day. I think they were some kind of pea. I put them in a pot and three days later they started to sprout. its been a week and a half and they are 6" tall and looking good. Does anyone use these for there plot. If they are pea how tall do they usually get and will they re-sow them selves.I have heard of winter pea. If they are not the winter version will they die with first frost? Thanks
Gene