Echinopsis pachanoi
The San Pedro cactus is very easy to grow in most areas. Because it grows naturally in the Peruvian Andes Mountains at high altitude and with high rainfall, it can withstand temperatures far below that of many other cacti. It requires fertile, free-draining soil. They average half a meter per year of new growth. They are susceptible to fungal diseases if over-watered, but are not nearly as sensitive as many other cacti, especially in warm weather. They can be sunburned and display a yellowing chlorotic reaction to overexposure to sunlight.
Pereskiopsis
The shape of "Pereskiopsis" is not that of a typical cactus, it has large green leaves and grows like a bush. Only the presence of areoles, usually with spines and glochids, and the flowers, allow it to be identified as a cactus. Flowers open during the day. "Pereskiopsis" is often used as a grafting stock for other cacti, as it promotes quick growth of the scion. Its small diameter makes it an excellent grafting stock for small seedlings, but many species will outgrow the stock and need to be re-grafted or rooted. "Pereskiopsis" are tropical cactus and can not withstand any frost. Maintain a temperature of approximately 12 °C during winter and be careful with water. The stem tends to rot very easily, especially with low temperatures when the plant is not actively growing.