Nasty smells and fake snakes do the trick
Solutions to the perpetual problem of protecting your favorite plants from deer, rabbits, groundhogs and squirrels are on the shelves of your local garden center or farm supply. There are two materials on the market that I have tested and found effective, providing you follow directions carefully. They are Liquid Fence and Repels-All by Shot Gun. Both contain some of the same ingredients, with the exception that Repels-All adds dried blood.