You are buying a beautiful crested San Pedro Cactus (Trichocereus pachanoi cristata). The plant has a height of around 3-6 cm and a width of 4-6 cm. When you receive the cactus (without soil and container) transplant it in regular cactus soil. Start watering in 2 weeks when temperatures are warm. Only water again when the soil is almost dry. Supply direct sunlight when possible. Keep your San Pedro Cactus completely dry in winter with temperatures between 5-10 °C. Maintain as much lighting as possible.