Critter-Crumbs is perfectly formulated for long-lasting outdoor use. Use Critter-Crumbs in flower/vegetable gardens & landscape areas. Deter rabbits, deer, squirrels, and chipmunks from destroying your valuable plants. Critter-Crumbs is effective and very easy to use. The nice-size bag will treat over 120 linear feet of gardens. It will last 1-3 months rain or shine. Critter Crumbs can also be used indoors to deter mice. Its more concentrated than our regular strength Moen’s Mouse-Mix and highly effective!