Photo: Sandino GuerreroCC BY 4.0via iNaturalistresized / cropped
Mexican Grass Tree Plant Care
Dasylirion longissimum Lem.
Updated · Sources · How we source care data
Dasylirion longissimum, common name the Mexican grass tree, is a species of flowering plant native to the Chihuahuan Desert and other xeric habitats in Northeastern Mexico.
Every 14–21 days
Full sun to partial shade
50–90°F
10–60%
At a glance
How do you care for Mexican Grass Tree?
Water Mexican Grass Tree every 14–21 days, letting the top layer of soil dry out between waterings, and give it full sun to partial shade. It prefers temperatures of 50–90°F (10–32°C) and 10–60% humidity. Fertilize it every 8 months during the growing season.
Where Is the Mexican Grass Tree Native To?
What Is the Mexican Grass Tree?
Mexican Grass Tree (Dasylirion longissimum) belongs to the Asparagaceae family within the Dasylirion genus. Mexican Grass Tree is native to the Chihuahuan Desert and other xeric habitats in Northeastern Mexico. Mexican Grass Tree is also known as Longleaf Sotol.
Mexican Grass Tree displays a slow-growing, drought-tolerant succulent growth habit, reaching up to 5 ft tall with a spread of approximately 3 ft. Mexican Grass Tree produces tall spike with small white or greenish flowers.
Leaf size: approximately 36 inches.
How Often Should You Water a Mexican Grass Tree?
Dasylirion longissimum requires watering every 14–21 days. Allow the top layer of soil to dry between waterings to prevent root rot. Reduce watering frequency during winter when growth slows.
Watering Frequency
Every 14–21 days
Let soil partially dry between waterings
What Light Does the Mexican Grass Tree Need?
Mexican Grass Tree thrives in full sun to partial shade.
Light Requirement
Full sun to partial shade
What Temperature and Humidity Does the Mexican Grass Tree Prefer?
Dasylirion longissimum grows best at temperatures of 50–90°F. Mexican Grass Tree prefers humidity levels of 10–60%.
Temperature
50–90°F
Humidity
10–60%
What Soil Mix Works Best for a Mexican Grass Tree?
Sandy, well-draining soil mix with added perlite and gravel for good drainage. Good drainage is essential for Mexican Grass Tree to prevent waterlogging, which leads to root rot and fungal issues.
How Often Should You Fertilize a Mexican Grass Tree?
Feed Mexican Grass Tree every 8 months during the growing season (spring and summer) with a balanced fertilizer diluted to the strength on the label.
Pause feeding in autumn and winter, when growth slows, and never fertilize dry soil — water first.
Fertilizing
Every 8 months
During the growing season
The PlantoScan app can remind you when to water and when to fertilize each plant.
How Do You Repot a Mexican Grass Tree?
Repot every 3-4 years in spring. Choose a pot one size larger than the current container, and ensure it has drainage holes to allow excess water to escape.
How Do You Propagate a Mexican Grass Tree?
Mexican Grass Tree can be propagated through seeds, offsets (pups).
Is the Mexican Grass Tree Toxic to Pets and Children?
Pet safety not verified
The ASPCA does not list Mexican Grass Tree, so we can't confirm whether it is safe for cats and dogs. Keep pets from chewing it as a precaution.
This is a general caution, not veterinary or medical advice. If your pet ate a plant, contact your vet or animal poison control.
See all plants toxic to cats and plants toxic to dogs.
What Pests and Diseases Affect the Mexican Grass Tree?
Mexican Grass Tree is susceptible to mealybugs, spider mites. Inspect the foliage regularly, especially along leaf undersides and stems. Treat infestations promptly with insecticidal soap or neem oil to prevent spread.
Yellow leaves, brown tips or drooping? See common plant problems and how to fix them.
What USDA Hardiness Zone Does the Mexican Grass Tree Need?
Mexican Grass Tree grows outdoors in USDA Zone 8a – 11b. It survives winters down to planting zone 8a. Mexican Grass Tree is native to the Chihuahuan Desert and other xeric habitats in Northeastern Mexico.
Hardiness Zone
Zone 8a – 11b
Keep exploring plants
Mexican Grass Tree is one of many species covered in the complete plant care and identification guide, which groups plants by genus, attribute, and popularity.
It belongs to the Dasylirion genus — compare its care with other Dasylirion species on PlantoScan.
Dasylirion is part of the Asparagaceae plant family — browse all Asparagaceae genera and species.
Mexican Grass Tree thrives in bright light and direct sun — see other bright-light plants.
Related Plant Care Guides
Closely related plants with similar care requirements:
Sources
- Scientific name & taxonomy: Dasylirion longissimum Lem., family Asparagaceae (first published in Ill. Hort. 3(Misc.): 91 (1856)) — World Flora Online record, IPNI name record, Wikidata.
- Pet toxicity: Pet safety not verified: the ASPCA does not list Mexican Grass Tree, so we can't confirm whether it is safe for cats and dogs. Checked against the ASPCA plant list; any other toxicity note on this page comes from PlantoScan's plant database.
- Photo: Sandino Guerrero, CC BY 4.0, iNaturalist — original.
- Hardiness zone: USDA Zone 8a – 11b, estimated from the plant's typical growing conditions.
- Care values(watering, light, temperature, humidity, soil, fertilizing): PlantoScan's plant database, filtered by automatic plausibility checks — values that fail them are hidden. How we source and check plant data.
Spotted a mistake? Email info@upvision.media with the page link — we check and correct reported errors.
Identify Plants Like the
Mexican Grass Tree Instantly
Scan any plant with your phone camera and get instant ID, care tips, water and fertilizer reminders, and health checks — all in one app.
Free
to download
iOS & Android
platforms
Light & dark
mode
100,000+
species