Mexican Grass Tree
Dasylirion longissimum
Mexican Grass Tree
Dasylirion longissimum
- Dasylirion longissimum, commonly known as Mexican Grass Tree, is a highly architectural plant that brings a clean, sculptural presence into the landscape. It’s often used as a focal point where strong form and symmetry are the main design drivers.
- The foliage forms a perfectly rounded sphere of long, narrow, grass like leaves that radiate outward in all directions. Unlike other Dasylirion species, the leaves are smooth and lack serrated edges, giving it a softer, more refined appearance.
- As it matures, it develops a tall, slender trunk that elevates the spherical canopy, creating a striking, almost geometric form. This makes it especially effective in modern and minimalist landscapes.
- It grows slowly but steadily, becoming more visually impactful over time. It works best when given space to stand on its own or when used in repetition for a strong, rhythmic effect.
- Dasylirion longissimum grows best in full sun and requires well drained soil. Once established, it is highly drought tolerant and thrives in hot, dry conditions.
- It can eventually reach 10 to 15 feet tall or more with a narrow trunk and a symmetrical crown. It is well suited for USDA zones 8 through 11. The foliage is evergreen.
- This plant has low toxicity and is generally safe for gardens with pets and children, though the leaf tips can be slightly pointed.
- The flowers may attract pollinators such as bees, though flowering is infrequent and typically occurs on mature plants.
- It is generally deer and rabbit resistant.
- Dasylirion longissimum fits especially well into modern, desert, and Mediterranean garden designs, where its form can be used as a focal point or repeated for strong visual structure.
- It pairs well with plants like Agave vilmoriniana to contrast its softer, flowing form, Creeping Thyme to create a low, silvery base layer, and Aeonium ‘Zwartkop’ to introduce a dark, contrasting element that highlights the clean green foliage.
- Expert Tip:
- Place this where it has room to be viewed from multiple angles, because its symmetry is one of its strongest features. Giving it space allows the full shape to read clearly and makes it much more impactful in the design.
- — Nick from Rooted Theory
Foliage:
Evergreen
Sun Exposure:
Full Sun (6+ Hours Of Direct Sunlight)
Water Needs:
Low,
Low to Moderate
Form:
Upright And Columnar
Mature Width:
5-6'
Bloom Season:
Infrequent
Mature Height:
11-15'
Proper planting technique will help your plants thrive! Follow these simple steps to help your plants establish quickly, develop a strong root system, and live longer:
- Properly dig the hole
- Amend the soil to suit each particular plant
- Place the plant and backfill the soil
- Provide ample water for each particular plant
- Review our how to plant guide!
For detailed information, please download our planting guides: