Cup plant is a tall and aggressive making it the perfect fit for establishing a living fence. Other species that grow well with Cup Plant are Yarrow, Blue Hyssop, Common Milkweed, Fireweed, Wild Strawberry, Stiff Sunflower, False Sunflower, Maximillian Sunflower, Bee Balm, Yellow Coneflower, Canada Goldenrod, Stiff Goldenrod, Big Bluestem and Switch Grass.