Tabebuia impetiginosa Pink Trumpet Tree Pau D Arco Seeds Container or Standard 10 seeds USDA Hardiness Zone (F): 9 Stunning bouquets of bright pink, lavish blossoms give a striking contrast against bare, dark brown branches. Every year, the Black Jacobin and Black throated Mango hummingbirds visit the tree, attracted by the aromatic flowers. After flowering season has come to an end, small light green leaves crowd the thin branches filling the tree with beautiful foliage. Tabebuia loves warm weather, but has been known to survive conditions of 18 degrees F.