Spanish Bayonette

Yucca aloifolia
 

5 to 20 feet

Fast rate of growth.

Full sun to Partial Shade

Excellent drought and salt tolerance

Zones 8 to 11

An erect trunk becomes heavy and topples over;
then the tip turns up and keeps growing.  2’ tall long spike

of flowers will form in the summer months; stalk will stop growing

after blooming.  One or more lateral buds will form then do the same

producing a thicket.. Great background or security plant “where its

fiercely pointed leaves will prevent passage of all

interlopers human and otherwise.”

http://florida.plantatlas.usf.edu/Plant.aspx?id=1735