Hunting Corn Fields

I hunt 40 acres of a 2,000+ acre swamp. My hunting land is on the edge of this swamp, and it borders a corn field. During the hunting season this corn field is hit very hard by the deer in the area. My question is this, right now the corn is still short and green. Will the deer still graze in the corn field this time of year, or do they typcially wait until fall when the cobbs start to form? Thanks!