I can't say 100% that a deer won't eat the stuff, but I wouldn't waste my time with it. Several years ago I gutted a buck and out of curiosity I cut open the stomach to see what he was feeding on. It was probably 75% wild mushrooms. I was surprised, but I didn't run to the local supermarket looking for mushrooms to put out for them. Deer feed on a vast amount of different wild plants,and something like wild onion grass could be one of them, but I wouldn't waste my time puttingit out for the deer.