Yes, slow-release fertilizers are suitable for Plumeria and provide a steady supply of nutrients over an extended period. They release nutrients gradually in response to temperature and moisture, reducing the risk of over-fertilization and preventing nutrient leaching. Slow-release granules can be incorporated into the soil during planting or applied to the soil surface and lightly covered. Follow the manufacturer’s recommendations for the specific product, as the release rates may vary among different formulations. Supplementing with additional liquid fertilizers or micronutrient supplements may be necessary in combination with slow-release fertilizers.