It is okay if your succulent remains in the small plastic pot. Small pots have a higher evaporation and are able to hold less water. The plant's thick stems will grow taller before the soil pressure causes it to bend. Plant in a well-draining soil with a tall planter. Popular potted cacti is the Old Man Cactus. This cactus is tall and cylindrical. It has modified spines covering it from top to base that look like hair. These spines become long and look like the long hair of an older man. The "hairs" or white spines of Old Man Cactus offer shade from the harsh sun while keeping the plant cool.