Cut the top ends at an angle to make them look different from the bottom ends. This will help you to know which end of the stems go into the soil. If you plant the cuttings upside down, they will not grow.
Cut off the bottom two leaves. Cut off some of the top leaves to stop the cutting from losing too much water. Cut off all flowers from the cutting.
Prepare the place where you will plant the cuttings. It is best to plant cuttings in containers as this stops the roots from being disturbed when you transplant the trees to the place where they will permanently grow. Make holes in the bottom of the container with a nail or a piece of wire. The holes let water drain out of the containers so that the seeds do not rot. Get some good garden soil and fill the container with it. Knock the container gently on the ground to settle the soil. Then add some more soil.
Place the cuttings into the soil so that two nodes are above the soil and two nodes are in the soil. Roots will grow from the part of the cuttings that are in the soil. The buds above the soil will grow into new stems. Place the container in the shade and keep the soil wet until the new plants are growing strongly.