Examine the boxwood stems closely and locate one that appears healthy. Cut it off 4 to 6 inches from the tip using hand pruners. Healthy stems have plenty of foliage with no bare spots and no visible signs of mold or mildews.
Fill a 6- to 7-inch-diameter plant pot with course sand. Add water until the sand is damp to the bottom and forms a clump when you squeeze it in your hand.
Smooth out the top of the sand and create a 1-inch-deep hole in the pot with your finger, pencil or stick.
Pull off all of the leaves from the bottom 1 inch of the boxwood branch. Dip that end into rooting hormone powder.
Insert the cut end of the boxwood branch into the hole and press the sand around it using your fingers until the branch stands up by itself.
Place the pot in an indoor location that has bright, but not direct, sunlight. You also can place it outside in a covered area, such as under a patio or under a large tree canopy.
Water the pot daily to keep it constantly moist. When you see new foliage or stems emerge from the pot, the branch has established a root system. Plant it in the ground in a shady area.