Decades ago in Connecticut I planted sunchokes in the gravelly corner where the driveway curved around. Visualize a rectangle with an oval inside. One corner "triangle" was where they were grown. Any that tried to wander out got run over and that seemed to keep them in check. Judy in New jersey where the sky is blue, sun is shining, and I'm waiting for it to warm up just a little more before I head out into the garden