Jay Gurney of Yankton Nurseries discovered that a Victoria Regina agave that had been out of the way in a greenhouse suddenly produced a 4 inch or so diameter stalk. His agave is about 35 years old. Succulent leaves produce the energy for a spectacular bloom that lasts months. See the story and comment if you wish: http://www.yankton.net/river_city/article_3adb923a-e508-11e2-b979-001a4bcf887a.html
Plant Exchange Blog 
Lovely…..