The plant can be placed outside for the summer in a semi-shady area. Subjected to high temperature, lack of fertilizer, bud drop due to very low humidity. Right after blooming, remove seed pots. Azaleas generally need little pruning except for exceptionally vigorous shoots which destroy the shape of the plant. High temperatures, plant too dry, soil has lost proper acid level, feed with acid fertilizer or chelated iron solution.
Commercial florist treat their plants so that most of the buds develop at once.
In the home it is natural for the buds to develop at different stages. Yes, but forcing azaleas is not recommended for home growers. Plants usually weaken and may fail to bloom again or even die. It is best to let them come into bloom naturally.