you can also grow balrey grass which looks identical and has similar nutrient content. but barley is much less sweet, it has a little more bitter taste to it. for some people the wheatgrass is just too intensely sweat and the taste turns them off, so they might do better with the barley grass. some say the barley grass is actually superior in nutrient quantity.
you can try both and see which one suits you better.
you can also just chew the grass, and then spit out the fiber. i do that, its fun. it great for teeth health. you'll be like a cow chewing it cud!