According to the Azaleas Society of America, the best time to prune your azalea is in early spring before it begins to put out new growth. While this means you will be cutting off this year's blooms, it will give your shrub a full growing season to fill out and mature. If you don't want to lose a year's worth of flowers, prune as soon as the azalea finishes blooming.
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Aileen Clarkson has been an award-winning editor and reporter for more than 20 years, earning three awards from the Society of Professional Journalists. She has worked for several newspapers, including "The Washington Post" and "The Charlotte Observer." Clarkson earned a Bachelor of Arts in journalism from the University of Florida.