Azaleas are native to a wide range of places, including Asia, Europe, and North America. They are about 3 feet tall and 3 to 4 feet wide. Depending on the variety, flower petals can be triangular, very narrow, or overlapping. The flowers might look very different depending on the petal shape of the different varieties, but all azalea flowers have the same signature funnel-shape. Leaves and nectar are toxic. A long time ago, receiving a bouquet of azaleas in a black vase was a well-known death threat.