Dasylirion longissimum
Mexican Grass Tree

A grassy-looking evergreen shrub that forms clumps of stiff, arching, olive green leaves. Develops a stout trunk over time. Eventually bears large spikes of creamy white flowers.

USDA zones: 8 - 11
Sunset zones: 12 - 24
Mature size: 6 - 10 feet high and 4 - 6 feet wide
Light needs: partial to full sun
Water needs: little to moderate water