Clean a healthy jade tree with a soft cloth dipped in rubbing alcohol. This eliminates any pest infestation and cleans dust off the branches. Sterilize a sharp knife in a mixture of 1 part bleach and 9 parts water.
Cut a 3 to 6 inch new-growth branch off the tree with the knife. Remove the leaves on the stem’s lower half. Lay the cutting on a paper towel and place in a warm area out of direct sunlight. Let a callous form on the jade branch’s cut area. It may take several days for the cut to heal.
Wash a small container in soapy water and rinse it in the bleach mixture. Allow the container to air dry. Fill the container with equal parts of potting soil and sand or commercially available cactus soil mix. Poke a hole in the soil’s center. Dip the jade branch’s cut edge in rooting hormone, and then slide it into the hole. Firm the soil around the stem to hold the cutting in place.
Mist the soil around the cutting with room-temperature water with a spray bottle. Keep the soil moist but not wet while the cutting develops roots. Covering the container with a clear-plastic bag increases humidity around the branch cutting.
Place the container in a warm area with bright, indirect light. After two to three weeks, test the branch cutting for roots. Brush a little soil away from the stem and look for the rootlets. If no roots are present after six weeks, try again with a new branch cutting.