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.
Puya dasylirioides
Puya dasylirioides comes from 2300-3300 meter elevation, where the climate is cool all year. It has taken temperatures in the mid-80s (30 °C), but it's possible that it won't thrive in consistently warmer conditions, especially if nights are warm. It is said to have taken winter lows of 19 °F (-7 °C), and might even handle colder temperatures. It grows well in a deep pot in normal cactus soil that contains no lime. Water it deeply occasionally, and avoid letting the soil dry out completely. Some protection from strong afternoon sun might be needed in warmer climates. Over about 40% humidity is recommended.