Morning glories can be susceptible to pests like aphids, spider mites, and whiteflies, which feed on their sap and weaken the plants. Additionally, fungal diseases such as powdery mildew and root rot can affect morning glories, especially in conditions with poor air circulation or excessive moisture. To prevent these issues, ensure that your morning glories are planted in well-drained soil and receive adequate sunlight. Regular inspection and timely treatment with appropriate organic or chemical controls can help maintain healthy and vibrant flowers.