A protection device segregates burrowing animals from plants. The protection device comprises a thread knitted into a boundary layer that is sealed with a staple. A user can insert a plant in a root ball earth into the protection device and insert the protection device into a hole in earth. The thread is flexible and does not release iron into the earth. The boundary layer prevents a burrowing animal from entering into the root ball earth and consuming roots of the plant. In some embodiments, the thread is a tubular non-woven stainless steel thread which is knitted in order to prevent existence of a seam. The thread allows the roots of the plant to grow out of the protection device allowing the plant to continue to grow, notwithstanding the boundary layer created by the thread.