Jay Gurney’s agave grew quickly, about a foot in 36 hours, he said. During this time the stalk exuded a sticky substance and tiny bracts appeared along the stalk. The stalk nearly reached the top of the greenhouse in which it grew. See the story at:http://www.yankton.net/river_city/article_3adb923a-e508-11e2-b979-001a4bcf887a.html
Plant Exchange Blog 
That is spectacular!