Encore Azaleas And Knockout Roses . You can mix encore azalea varieties that grow the same size or mix heights for more dimension. White, salmon, mauve, pink, purple, and all variations of red, orange, and yellow. Shrubs fresh from the grower! knockoutrosen Depicted Azalea, Crape from www.pinterest.com The grow in completely different conditions. What plants i can use to replace the roses? Drift roses also bloom nonstop and don’t need to be sprayed for the disease.