There's a debate over the true eco-friendly nature of artificial grass. On one hand, fake turf saves water and needs very little maintenance over a 15- to 20-year period. On the other hand, it's made from petroleum, is not biodegradable and absorbs heat instead of cooling like real plants and grass can do. The greenest solution? Think ground-cover plants that involve almost zero mowing, watering or fertilizers. Ground covers like blue star creeper, elfin thyme and fleur de lawn love the sun, are drought resistant and are friendly to foot (or paw) traffic.