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Description

The Mexican grass tree is the largest growing species of Dasylirion in cultivation. It is a natural specimen and focal accent plant due to its very long and cylindrical foliage and tall flowers spikes. A stout trunk can develop over many years and eventually reach 8-10 ft. in height; some specimens will develop branched trunks.

Mexican grass tree is native to dry hillsides and seasonal stream habitats in northeastern Mexico where it is adapted to heat, drought and winter temperatures to 15°F. It has increasingly become a popular feature and specimen plant in Inland Empire gardens. Sometimes it is planted in large containers and displayed in courtyards; other times it is part of a cacti and succulent display in southwestern and Mediterranean style gardens.

Water Needs

The Mexican grass tree is well adapted throughout the Inland Empire where it thrives in sun and with normal winter rainfall and low amounts of summer water. It is a dramatic foliage accent shrubs that will produce annual flower spikes when mature. Monthly deep watering from spring through fall will enhance its flowering and help maintain good foliage character. It should be noted there are several winter months marked by an asterisk (*) when rains can provide sufficient moisture and irrigation is not needed. The high and low range of moisture indicates it can grow with varying amounts of water depending upon exposure conditions and size.

Irrigation Schedule and Graph

Low Water Use Plants

Irrigation Schedule 1

  Jan* Feb* Mar* Apr May Jun Jul Aug Sep Oct Nov* Dec*
Runs per Month 0x to 2x 0x to 2x 0x to 2x 1x 1x 1x 1x 1x 1x 1x 0x to 2x 0x to 2x
Inches per Run 1" 1" 1" 1" 1" 1" 1" 1" 1" 1" 1" 1"
 
Inches per Month 0" to 2" 0" to 2" 0" to 2" 1" 1" 1" 1" 1" 1" 1" 0" to 2" 0" to 2"

Range of supplemental summer water: 7"
Range of supplemental winter water: 0"-10"

 
0"-2"
0"-2"
0"-2"
1"
1"
1"
1"
1"
1"
1"
0"-2"
0"-2"
  Jan* Feb* Mar* Apr May Jun Jul Aug Sep Oct Nov* Dec*
For more information on how to use this Irrigation Schedule and Graph, follow this link.

For information how to calculate your irrigation system’s schedule and precipitation rate, please follow this link.

Plant Properties

Plant Type: Yucca
Foliage Character: Evergreen
Habit: Symmetrical, Solitary, Rigid, Dense
Growth Rate: Slow
Height: 8 ft. - 10 ft.
Width: 6 ft. - 12 ft.
Water Needs: Low 1
Foliage Color: Dark green
Flower Color: Cream
Flower Season: Summer, Spring
Soil Adaptations: Well-draining soil
Exposure Adaptations: Heat, Frost, Aridity, All day sun
Function: Specimen, Flowering accent plant, Container plant

Maintenance

Remove dried spent flowers as necessary. Prune out dried or yellow lower leaves anytime of the year (D).

References

Associations

Plant Lists