Cut a trunk growing at the side of a yucca tree in late spring or summer using a pruning saw. Remove the thatch and leaves from the lower 12 inches of the cutting.
Season the cutting by placing it in a cool, shady place for about a week.
Dig a hole about a foot deep. Cut 1/4 inch from the bottom of the cutting and place it cut side down in the hole. Fill in around the stem with the dirt you removed from the hole. Press down with your hands as you go to remove trapped air.
Water slowly, allowing the soil to absorb as much water as possible. Stop when the water begins to run off rather than sink in. The cutting doesn't need additional water after the first week or two.