Agave bracteosa is the spider agave — a small, graceful, clumping species from the mountains of north-eastern Mexico whose narrow, arching, spineless (or nearly spineless) leaves radiate outward like the legs of a pale green spider. It is one of the few agaves that combines genuine cold hardiness (to −10 to −12 °C in well-drained soil) with a complete absence of dangerous spines, making it an outstanding choice for gardens where both frost tolerance and pedestrian safety matter.
Taxonomy and nomenclature
Family Asparagaceae, subfamily Agavoideae. Placed in Agave subgenus Littaea (the spicate-inflorescence group). POWO: Mexico (Coahuila, Nuevo León). The species grows on limestone cliffs and rocky ledges in the Sierra Madre Oriental, at elevations of 900–1,700 m.
Common names
Spider agave, squid agave, candelabrum agave (English).
Morphological description
Habit
A small, clumping, rosette-forming succulent. Individual rosettes are 30–50 cm tall and 50–60 cm wide. The species offsets freely, forming attractive multi-rosette clumps with age.
Leaves
Narrow, strap-shaped, arching to recurved, pale green to yellow-green, 30–50 cm long, 2–5 cm wide. Margins smooth or bearing tiny, inconsequential teeth — effectively spineless. No terminal spine (or only a soft, flexible tip). The gracefully recurving habit and pale colour are highly ornamental.
Inflorescence and flowering
Monocarpic at the rosette level (but the clump persists through offsets). The inflorescence is an unbranched spike (subgenus Littaea), 1–1.5 m tall, densely packed with creamy white flowers. Attractive and fragrant.
Cultivation guide
| Hardiness | −10 to −12 °C / 10–14 °F (USDA zone 8a) |
| Light | Full sun to partial shade (shade-tolerant for an agave) |
| Soil | Well-drained; limestone/alkaline preferred |
| Water | Low; tolerates more moisture than most agaves |
| Spines | Effectively none — safe for high-traffic areas |
| Size | Small (30–50 cm tall × 50–60 cm wide per rosette) |
Key strengths
The combination of cold hardiness (−10 to −12 °C), spinelessness and shade tolerance makes Agave bracteosa uniquely versatile. It is one of very few agaves that can be safely planted alongside paths in USDA zone 8a gardens. It also tolerates more moisture and shade than most agaves, reflecting its cliff-dwelling, canyon-wall habitat in the Sierra Madre Oriental.
Landscape use
Excellent in rock gardens, along pathways, in containers, as an edging plant, in mixed succulent plantings, and as a groundcover when multiple rosettes are allowed to form a colony. The clumping habit creates a soft, flowing texture unusual for agaves. Works well in shaded or partially shaded positions where most agaves would etiolate.
Cultivars
‘Monterrey Frost’ — variegated form with cream-margined leaves; one of the most attractive variegated agaves for cold climates.
Propagation
Offsets: freely produced. Separate in spring.
Seed: germinates easily at 20–25 °C.
References
Gentry, H.S. (1982). Agaves of Continental North America. University of Arizona Press.
POWO (2026). Agave bracteosa. Plants of the World Online, Kew.