The Cleistocactus Straussi is also commonly known as the silver torch or woolly torch due to its upright growing stems. Native to the Bolivia and Argentina, it can produce some stunning pink flowers and can tolerate more cold than other cacti. Light: Bright indirect to full sun. Water: Generally cacti need only be watered very sparingly. Ensure the soil throughout the whole pot has dried out between waterings. Toxic Pot size: 5.5cm