Variety of small cactus plants with colorful flowers in plastic pots on white loading trays Stock Photo Alamy Cutting of Curly Epiphyllum curly orchid cactus Curly Sue rare plant When do #saguaros grow arms? These slow growing, long lived #cacti may start growing arms when they are between 50 and 100 years old. How many arms have you seen on a Calathea Whitestar kaufen? Laura Plantsome