Step 1: Choose a thick branch from a healthy tree. Thin branches tend to not root successfully. Cut the branch. Do not cut at an angle. Make a straight cut.
Step 2: If you would like to plant the cutting after it has been cut, use a rooting gel such as Clonex. If you would like to take a more natural approach, store the cutting in a cool, dry location for two weeks before planting. After two weeks coat the bottom of the cutting with a powder rooting hormone such as Root Boost. Do not use Clonex or any rooting gel. Gel rooting hormones are only effective if used on a freshly cut Plumeria.
Step 3: Fill a growing container with potting soil, in particular one with perlite so water drains easily through the container. Plumerias do not like soil that hold allot of moisture. This could make the cutting rot and die. Once the container is filled with potting soil. Water the potting soil thoroughly until water comes out of the holes at the bottom of the growing container.
Step 4: Plant your Plumeria with the rooting hormone of your choice coated on the bottom of the cutting in the growing container. Pack the soil down on all sides so the cutting does not move easily in the container. Depending on the size of the cutting and growing container, you may need to use a bamboo steak to prevent the cutting from falling out of the container.
Step 5: Place your potted Plumeria cutting in a warm, sunny location. Preferably an area that gets full sun all day. Monitor your cutting weekly. Do not water your cutting like a regular plant. This can make a cutting rot and die. Check the soil regularly, if it becomes completely dry, water the cutting. Do not drench the growing container with water. Add a small amount of water. I recommend using your index finger and inserting it as deep as you can in your growing container. If you feel moist soil. Do not water.
Step 6: Cuttings can take up to six weeks to root successfully. When leafs begin to grow from your cutting, that's the indication it has rooted and you can begin watering on a regular basis.
Although the methods discussed on this page have worked for me, they may not work for you. Growing Plumerias successfully is all up to you, the grower. I'm not responsible for any damages that may occur as a result of following my methods.