A 15-foot-tall Agave plant is blooming and drawing crowds to the Dallas Arboretum. The Arboretum says the Agave victoriae-reginae is 20 years old and this will be the only time it blooms in its lifetime. Once it finishes blooming, the plant will die, but not before sowing seeds for the next generation. The plant just started opening up and will bloom in the Garden's Rory Meyers Children's Adventure Garden for two to four weeks. Agave victoriae-reginae plant is endangered in its native Sierra Madre mountain range of Chihuahua, Mexico.