Squirrel attack

Caught a squirrel red-handed this morning crushing my tiny cantaloupe seedling while munching on the petunias I planted in the container for color.  Upon inspecting other areas of the garden for further damage, I discovered that he had also snipped off nearly every strawberry on the upper deck and had made a mess of several containers.

This squirrel views any open patch of dirt as a sign that buried treasure lies just beneath.  Short of covering every container with a wire cage, I'm not sure what I can do to keep him out. He touches my tomatoes, though, and he's dead.