Madagascar jasmine, or stephanotis floribunda, is a climbing vine with shiny, dark green leaves and showy white, star-shaped blooms. Although Madagascar jasmine isn't a true jasmine, the sweet fragrance of the blooms will smell very similar. Start Madagascar jasmine by taking cuttings from a healthy plant in the spring.
Water the Madagascar jasmine the day before you plan to take the cutting so the plant will be well hydrated. Wipe a sharp knife or pruners with rubbing alcohol to prevent spread of bacteria.
Cut the tip of a young, healthy Madagascar jasmine stem just below a set of leaves, and don't take the cutting from older parts of the plant. Make sure the cutting has at least four pairs of leaves.
Fill a planting tray with a mixture of half perlite and half peat moss or sand. Moisten the potting mixture with a spray bottle until it's wet clear through, but not dripping. Poke planting holes in the potting mixture with your finger or the eraser end of a pencil. You can plant several cuttings in the same tray, as long as they aren't touching.
Remove the lower leaves from the cutting, and leave two sets of leaves intact. Dip the tip of the cutting in rooting hormone and plant it in the potting mixture with the leaves above and not touching the soil.
Put the tray in a plastic bag and use small stakes or a wire hoop to keep the plastic from touching the soil or the cuttings. Close the bag securely.
Put the planting tray in a warm place, in indirect but bright sunlight. Don't put it in direct sunlight because the plastic will store heat and burn the cuttings.
Check the trays daily, and mist the potting mixture lightly if it's dry. If you notice condensation building up on the inside of the plastic bag, poke a few holes to allow ventilation.
Tug lightly on the cuttings after they've been in the plastic bag for about two weeks. If you feel resistance, the cuttings have rooted. You may also be able to see the fine, white roots through the drainage holes in the bottom of the planting tray.
Remove the tray from the plastic bag, and move each rooted cutting to a 4-inch pot. Put the young Madagascar jasmine in filtered light and keep the soil moist. As the vine grows, give it a support or small trellis to climb on.