Many other bromeliads are popular ornamental plants, grown as both garden and houseplants. These plants are cultivated as ornamental houseplants and rock or succulent garden plants. Succulents are very adaptable houseplants and will thrive in a range of indoor conditions. Some species are commonly grown indoors as ornamental houseplants in cooler climates. Succulents are favored as houseplants for their attractiveness and ease of care. Ornamental plants are used for decorative purposes, such as gardens and houseplants. They are commonly grown indoors as houseplants. Young plants are occasionally used as houseplants. Cacti are also grown as houseplants, many being tolerant of the often dry atmosphere. Some of these ferns are popular in cultivation as houseplants. As with most houseplants, wilted leaves indicate either lack of water or overwatering. "Alocasia" are tropical plants that are increasingly becoming popular as houseplants. This plant must be grown as tender bulbs or houseplants in cooler areas. They are hardy in USDA zones 9-12 and are also grown as ornamental houseplants. Different species of houseplants require different soil moisture levels.