Azaleas prefer indirect sunlight. The ideal condition is indirect sun exposure during cool mornings. While it can tolerate direct sunlight, it’s best to keep it at one to two hours. At the most, they should be exposed only up to four hours.
Make sure to subject your plant to indirect sunlight at least six hours a day. Doing this is essential to prevent the leaves from yellowing. However, avoid leaving the plant by the window during the night if you live in a colder climate. Temperature drops may cause damage to the plant.