Put on gardening or work gloves, especially if the cactus is very spiny.
Cut a section off the parent cactus. The longer this section is, the better. Try to take a cutting at least 3 inches long, and cut where you see a natural joint.
Dip the end of the cutting in garden sulfur to help prevent rot. This is a natural substance suitable for organic gardeners.
Leave the cutting to dry for up to two weeks in a warm, dry place. When the cut end hardens, the cutting is ready to plant.
Fill a plant pot with a mixture of 50 percent potting compost and 50 percent sand. Press lightly down to firm. Don't water this mixture; it should be relatively dry.
Push the cutting a couple of inches into the compost, and place the pot somewhere warm, such as on a windowsill.
Dampen the soil after four to seven days. Thereafter, water when the soil dries out nearly completely.