This is the time when azalea gall shows up. It’s most common on the azaleas, but occasionally you’ll see it on other Rhododendrons. 

Azalea leaf gall looks thick and fleshy when it first appears. You can cut them off and dispose of them if you like.

This is also the time to pinch or cut the new growth on azaleas to keep them thick and bushy. You can cut these new stems in half using a shearing tool or scissors.