To improve pollination success in Plumeria, create a pollinator-friendly garden by planting a variety of flowering plants to attract bees and butterflies. Provide ample sunlight for healthy flower production and strong fragrance to lure pollinators. Avoid using insecticides or pesticides that may harm pollinators. Hand pollination can also be used to ensure successful pollination and desired breeding outcomes. Regularly monitor the plant for signs of pollination success, such as seed pod formation, and take appropriate measures to support pollination if necessary.