Deer-Off is a biodegradable deer deterrent EPA-approved for use on all plants, including food crops. Use Deer-Off at least once a season for best results. Each weatherproof application lasts three months. Available in a ready-to-use spray bottle. Also effective against rabbits, voles, moles and squirrels. Discontinue use two weeks before harvest. A combination of egg solids, garlic oil and hot peppers makes this an effective deterrent.