Indoor Lighting Requirements

Provide as much light as possible if kept indoors. Typically speaking, they need approximately 4-6 hours of light per day to thrive. Choose an east facing window if possible. A south or west facing window will also work. You may need to move the plant around a few times in order to find the perfect spot. You may notice the plant stretching towards the light. This is called etiolation. It happens when the plant does not receive adequate light for prolonged periods of times. This process produces weak growth.
Frost Tolerance
Crassula Tetragona can tolerate mild frost and freezing temperatures as long as they are not for long periods of time. I keep all of mines outdoors all year long and they have been able to deal with mild frost, freezing temperatures, and winter rains.
Soil Requirements
Just like with other succulent plants, Crassula Tetragona needs a well draining soil.
Watering Requirements
Watering largely depends on the climate where you live. Although these plants are highly adapted to dry weather conditions, they do much better when given sufficient but not too much water.

Propagating from stem cuttings:

Obtain a stem cutting and let it dry for a day or so. Since the stems are thin they shouldn’t take that long to dry.
Once the cut has healed and dried, stick the cuttings in a well draining potting mix.
Keep away from direct sunlight. Water the soil every few days or when it feels dry.
After about two weeks or so, you will notice new roots growing.
After about four to six weeks, the cuttings should be fully rooted and you will soon notice new growth developing from the top or the sides along the stem.