When watering plants, it’s best to avoid overhead watering as it can lead to leaf spot diseases. Instead, use drip irrigation or soaker hoses to water the base of the plant. If you water in the morning, the leaves will have time to dry during the day, which reduces the risk of leaf spot diseases. To further decrease humidity, improve air circulation around the plant. Regularly check your Plumeria for signs of leaf spot diseases and take necessary steps to protect the foliage from issues related to overhead watering.