Intermediate wheatgrass is good forage for cattle, so I'm sure deer will eat rather that go hungry. But I don't know if it is one of their favorite foods. My garden is on the edge of a small town. Deer tend to stay away during spring and summer. In fall, dominant males push other males out of the woods along the rivers. Then they get in my garden and might eat somewheatgrass, but that doesn't hurt it. In winter, deer will eat anything, and they prune my fruit trees, which I don't like. But if they eat the wheatgrass, they don't hurt it. Wheatgrass blooms in spring and produces seeds early summer here. Seed is ripe a little later than wheat seeds.