Grass is not the only option when short ornamental plants are desirable. Creepers are also a good option, like creeping thyme. From a distance, creeping thyme sort of looks like dwarf grass or moss. It's green but when it blooms, it has beautiful purple flowers. It looks gorgeous and is one of the best things to plant in flower beds or rock gardens. Some people even use it as filler for cracks in patios, etc.