Deer do eat hostas, according to the University of Vermont Extension Department of Plant and Soil Science. Deer will generally eat any plant. Although there are some that have a lower chance of being consumed.
Deer seek out plants that have a high moisture content since they get a third of their water needs from plants, according to the University of Vermont Extension. They also choose plants that contain protein and avoid plants that are poisonous or have made them sick in the past. They also avoid plants with a bad aroma and those that are fuzzy or prickly. Planting aromatic plants can keep the garden safer.