If you want to experiment with the living fence concept before making the arduous effort of planting and nurturing a long line of closely planted perennials—shrubs, brambles, trees, and vines—try growing a temporary one of tall, fast-growing annuals, such as this screening hedge of sunflowers, amaranth, and sorghum. It provides many of the ecological benefits of a permanent hedgerow: increase in insect diversity and support of pollinators; food and shelter for birds, small mammals, and amphibians; and feed for poultry or pigs. Actually, the mature seeds of all three are good people food as well. And you can make beer from sorghum!