Mexican Grass Tree

Binomial name

Dasylirion longissimum

Common names

Texas Sotol, Long-Leaf Sotol

Description

Dasylirion longissimum, commonly known as Texas Sotol or Long-Leaf Sotol, is an impressive, hardy succulent that thrives in arid conditions. Native to the southwestern United States and northern Mexico, this plant is known for its tall, spiky rosette of long, narrow leaves that radiate outwards in a dramatic, architectural fashion. Over time, it develops a stout, woody trunk, adding an element of structure to desert or xeriscape gardens. In late spring or early summer, Dasylirion longissimum produces a tall flower spike, covered with small, creamy white blooms, adding a touch of beauty to its rugged, sculptural form.

Light requirements

This plant thrives in full sun, where it can develop its signature spiky, upright form. It’s well-suited to areas with plenty of direct sunlight, though it can tolerate some light shade. However, in shadier spots, it may not flower as prolifically and can become leggy.

Soil preferences, including pH and drainage

Dasylirion longissimum prefers well-draining, sandy or gravelly soil with a neutral to slightly alkaline pH (6.0 to 7.5). It is particularly suited to dry, rocky landscapes or desert gardens. Well-draining soil is crucial to avoid waterlogging, as this plant is highly drought-tolerant and can suffer from root rot if kept in consistently wet soil.

Water needs

Water sparingly, allowing the soil to dry out completely between waterings. This plant is highly drought-tolerant once established and prefers to be on the dry side, particularly in cooler months. During the growing season, provide occasional deep watering, but avoid overwatering, especially in areas with heavy rainfall or high humidity.