Question
when do you plant azalia bushes

Answer
Debi,
You can plant an azalea anytime you find it outside in the garden center - spring is probably best in that the plant will have the entire summer to get established. When the nursery stock is on display outdoors at your garden center it is safe to plant the plants in your garden.

 If the azalea you have was given to you from a greenhouse, as many Easter plants are, you'll need to wait until day AND night temperatures are reliably above freezing before you plant it outdoors.  Keep it watered while indoors, and plant it in a part-shade location once the weather is warm enough.

all the best,
C.L.