Using only natural ingredients, it works by both taste and smell aversion, and it can be applied in almost any climate. It won't wash off in a heavy rain, it dries clear, and it's harmless to all wildlife, pets, aquatic life, and humans. Bobbex can be used on all ornamentals, trees, and shrubs, so you can start growing a beautiful worry-free garden! Concentrated Spray. 1-quart Bottle.