How can I propagate plumeria in water effectively?

To propagate plumeria in water effectively, you can start by taking a cutting from a healthy plumeria plant. Make sure the cutting is about 12 inches long and has at least two nodes. Place the cutting in a container filled with water, making sure that at least one node is submerged. Change the water every few days to prevent rotting and place the container in a warm, sunny spot. Roots should start to grow in a few weeks, at which point you can transfer the cutting to soil.