Gardenia plants are perennials with glossy, dark green foliage and fragrant, rose-shaped blooms. They can be planted in containers or outdoors where they can reach heights of up to 6 feet. Gardenia plants are only hardy in zones 8 to 10, so they must be taken inside during winter in cooler regions. These plants are a bit testy to grow, but quite easy to start from cuttings.
Clip off a 4- to 6-inch piece of stem from a gardenia plant directly behind a bud. Strip the lowest leaves from the cutting.
Coat the clipped end of the cutting in rooting hormone, which is available in a powder or gel form. Both types are equally effective, though some gardeners prefer the gel because it is easier to work with.
Fill a planting container 3/4ths of the way with equal parts sand and peat moss. Insert the bottom 2 1/2-inches of the cutting into the mixture. Water just enough to moisten.
Bend a small piece of wire into an arch shape and stick into the soil. Cover the pot and arch with a plastic bag and use a rubber band wrapped around the bottom to hold it in place. This will create the same humid atmosphere as a greenhouse and will speed up the rooting process.
Place the container in a bright location, but not in direct sunlight. Add water whenever the soil feels dry to the touch.
Move the new gardenia plant into a larger pot or outdoors, depending upon your location, once the roots have developed. This usually takes between six and 10 weeks.