Prepare a small pot for planting your cuttings by filling with well-draining potting soil. Pour about an inch of the rooting hormone in a plastic cup.
Cut 6- to 8-inch-long sections of recently bloomed branches, using a sharp scissors. Measure from the stem tips, and make the lower cut at a 45-degree angle.
Remove all spent flowers down to healthy leaves on the cutting. Remove all leaves from the lower half of the stem. Although you can take cuttings at any time of the year, the recommended time is between November and February.
Insert a pencil at a depth of about 3 to 4 inches in the rooting medium to create planting holes for the cuttings. Dip the base of each cutting in the rooting hormone. Plant immediately in individual planting holes, inserting each cutting to half its length.
Firm the soil around the cuttings. Water well. Place the pot in a large, clear plastic bag. Insert a chopstick in the soil to help keep the bag up. Close the top with a rubber band to create a greenhouse effect.
Place in a bright, warm spot but out of direct sunlight. Open the bag every three to four days and water enough to keep the soil moist. It will take a couple of months for the cuttings to root.
Grow the plants in the pot through the first summer, as this is important for developing a strong root system. Transplant to a permanent spot in the garden in late fall or winter.