Azalea Flower Wilting. Azaleas especially recently planted or young plants require a consistently damp to moist but well-drained soil in order to establish a root system. With special care your plants may make it.
This is a fungal disease that affects flowers within a day of contraction which is why flowers may be healthy one day and brown the next. If soil is dry to the touch give the azaleas more water. These guys use so much water when they are flowering that they get watered almost every 36 hours on really hot days like the past few.
Petal blight is a serious fungal problem.
If the azalea flower itself is the only part of the plant that appears to be suffering and turning brown the azalea has Ovulinia azaleae or petal blight. Azaleas especially recently planted or young plants require a consistently damp to moist but well-drained soil in order to establish a root system. Azaleas that suffer from drought will have a wilted appearance flowers and leaves that curl up and potentially turn brown. Wet weather in spring often results in serious damage from the petal blight fungus.