Organic pest control for Plumeria can be achieved by using natural remedies like neem oil, insecticidal soap, or horticultural oils. These substances are effective against common pests like mealybugs, aphids, and spider mites without harming beneficial insects. Regularly inspect your plants for pests and treat them early to prevent infestations from spreading. Encouraging natural predators, such as ladybugs or lacewings, can also help keep pest populations in check.