Dasylirion longissimum Lem.
Mexican Grass Tree
Dasylirion longissimum var. longissimum
Dasylirion longissimum is a large succulent plant with grass-like leaves that radiate symmetrically out of a large woody trunk. Leaves are stiff, unarmed, glaucous green, and up to 6 feet (1.8 m) long. The trunk can slowly but eventually grow up to 15 feet (4.5 m) tall. In the summer, a 9 foot (2.7 m) tall spike with small white flowers emerges from reddish buds.
USDA hardiness zone 8b to 10b: from 15 °F (−9.4 °C) to 40 °F (+4.4 °C).
How to Grow and Care
Dasylirions are slow-growing, carefree, and durable, drought-tolerant plants. However, they grow faster if watered well (don't water the crown, though they rot easily). They should be placed in a sunny, well-drained area with additional summer water in dry climates in the garden.
These make great specimen plants for xeriscape gardens and blend well in either tropical or arid gardens. Small plants are relatively inexpensive, but larger ones are a fortune. These make excellent potted specimens, and their symmetrical form provides a striking focal point.
They thrive best in full sun but can be grown with some shade and humidity. Plant in very fast-draining soil and provide little or no water in winter. Treat like a succulent. Best where winter temperatures stay above 50°F (10°C) but can take some periods of frost. Plants in containers can be moved inside during longer cold spells.
See more at How to Grow and Care for Dasylirion.
Native to the Chihuahuan Desert and other xeric habitats in Northeastern Mexico.
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