Hardy azaleas take your garden design to a new level. Azaleas are available in an array of vibrant flower colors, and their fragrant blooms perfume the air when they burst open in late spring to early summer. Hummingbirds and butterflies often visit the flowers and sip its nectar. Growing 4-6 ft. tall, hardy azaleas are a manageable size and ideal for planting as a flowering hedge, a foundation planting or as an accent plant. They can also handle winter temperatures, even when it drops below 0 degrees Fahrenheit. These versatile shrubs perform best when planted in full sun to partial shade.