Agave americana medio-picta 'Alba'
Agave americana medio-picta 'Alba' (White-Striped Century Plant) - A medium sized century plant to 3 to 4 feet tall by 4 to 6 feet wide with a bold greenish cream central stripe and blue green margins. As with the species there are recurved spines on the margins and a long terminal spine. Yellow-green flowers attract hummingbirds, however the Century Plant doesn't bloom until it is a decade or so old (not a century!) and the plant dies after flowering. Plant in full sun. Irrigate occasionally to not at all. Cold hardy to 15 degrees F. This is a large dramatic plant but care must be exercised when choosing to plant. Give it plenty of room and situate it away from traffic. Good on a hillside. This is a very pretty Agave. Use extreme care when working around or trimming any Agave. Not only are the spines wicked and cause a painful swelling if one is poked, but the sap of many species is caustic.
From AGAVES & YUCCAS