There are many varieties of drought-tolerant plants that are available for a garden. These include agaves, aloes, yuccas, ephedra, creosote, cacti, hens and chicks, stonecrop, portulaca, coneflower, agastache, crescent milkvetch, desert dandelion, desert rosemallow, birdcage evening primrose and lantana.
Aloes are succulents, which means they store water in their fleshy leaves and don't need a lot of watering. Indeed, too much watering can damage them. Though many are grown for their leaves, some also produce beautiful flowers. Aloes are good for rock gardens and as ground cover.
Agaves resemble aloes and are also known as century plants. This is because they're supposed to bloom only once a century. However, most agaves don't take a century to bloom, though it might take at least 6 years before they produce a flower stalk. The flowers are fragrant and can last up to two months.
Sedum or stonecrop are not only grown for their succulent leaves, but also their clusters of flowers, which are star-shaped and have rose-colored or pink petals that turn bronze as they age. Sedum is good for sites that are dry and infertile. It spreads slowly, and it can be many years before it needs to be divided.
Yuccas are members of the lily family. They send up flower stalks from basal rosettes of rigid, spiny leaves. The flowers are numerous, cream or white colored, and bell-shaped.