A thorny plant called trifoliate orange—nicknamed the Rambo bush—is sold as a low-cost living barrier. It is marketed under the name Living Fence. Trifoliate orange is so dense and fast-growing that it can stop speeding vehicles; it is used by the U.S. military to help secure the perimeters of missile silos and armories; and its razor-sharp thorns make it a great fit for domestic security needs.
