Autumn Bravo produces a great show of 3 inch single red blooms spring summer and fall. The colorful red flowers contrast nicely against the dark green foliage. The Encore Bravo is cold hardy down to USDA zone 6b. Encore Azaleas are known for their ability to tolerate full sun better than traditional azaleas. Encore Azaleas preform best when planted in a mix of slightly acidic soil and organic matter. Fertilize in spring with a slow release granular fertilizer.