I plant brassica food plots every year. Radishes, rape, turnips, kale several different varieties. There is a new variety of kale I really like. I have seen deer totally ignore the plots, I have seen deer devour them before they ever matured but what I usually see is after the first really solid freeze, the bitterness in the brassicas goes away and they become sweet and then the deer go nuts. My deer up in PA are so used to them now they'll even paw up the bulbs and eat them late into the winter. I've had a lot of luck just over seeding them into a white clover plot.