Agave letonae Trel.
El Salvador Sisal Agave
Agave letonae, known as El Salvador sisal agave, is a domesticated variety of Agave angustifolia (currently classified as Agave angustifolia var. letonae) cultivated for centuries in El Salvador, Guatemala and Honduras for its exceptionally fibre-rich leaves. Its holotype was collected in El Salvador in 1923 by F. W. Taylor. The plant forms robust rosettes of rigid, linear leaves in white-green to grey-green colour, whose high-quality fibre was commercially exploited as an alternative to sisal (A. sisalana) in Central America during the 20th century. The letonae variety is distinguished from other forms of A. angustifolia by its longer, near-white leaves and by developing a visible woody trunk over time as lower leaves are removed for fibre extraction. It is a monocarpic plant that flowers only once at the end of its long life, producing a 3–5 m floral scape.
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Overview
| Category | Classification |
|---|---|
| Family | Asparagaceae |
| Genus | Agave |
| Growth Habit | Medium to large rosette, acaulescent or developing a short trunk over time. Diameter 1–2 m. Monocarpic, produces basal offsets and bulbils on the scape. |
| Conservation Status | Not evaluated (NE) independently by the IUCN. As a cultivated variety of A. angustifolia, domesticated populations persist in El Salvador and Guatemala, though commercial cultivation has declined. |
| pH Target | 6.0–7.5 |
| Type | Sandy-loam to clay-sand, well-drained; tolerates marginal soils |
Origin & Habitat
Morphology
Linear to narrowly lanceolate, rigid and very fibrous, 80–130 cm long and 4–8 cm wide, white-green to pale grey-green — notably paler than other varieties of A. angustifolia. Margins with small dark-brown corneous teeth spaced 1–3 cm apart; terminal spine brown to black, 2–4 cm long. The extractable fibre per leaf is long, silky and of high tenacity.
ecoYellowish-green, tubular, 5–7 cm long, grouped in panicles on a scape 3–5 m tall. Flowers only once at the end of the plant's life. Bulbils that form on the scape branches after anthesis are the main route of vegetative propagation.
ecoInitially acaulescent; over time and with repeated removal of lower leaves for fibre, it develops a short, robust woody trunk up to 60 cm tall. This visible trunk is characteristic of individuals managed in fibre plantations.
ecoShallow and fibrous root system, well adapted to seasonally dry tropical soils. Roots reach 2–3 m radially and contribute to slope and degraded soil stabilisation.
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Requirements
Soil & Substrate
Type
Sandy-loam to clay-sand, well-drained; tolerates marginal soils
groups Beneficial Associations
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Propagation Strategy
I
S
Does not require frequent repotting when grown in the ground. In containers, repot every 3–5 years.
Apply a balanced fertilizer (10-10-10) once a year in spring for ornamental cultivation. Fibre plantations apply urea in small doses to stimulate leaf growth.
Uses & Applications
Precautions / Toxicity
Mild to moderate. The terminal spine can cause puncture wounds. The small lacerating marginal teeth require gloves during handling. Sap may cause mild skin irritation.
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Plant Health
Root rot (Phytophthora spp., Pythium spp.)
Mealybugs (Pseudococcus spp.)
Agave snout weevil (Scyphophorus acupunctatus)
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"Agave letonae is one of the few agave varieties domesticated specifically in Central America for industrial fibre, differing from the base species A. angustifolia by its paler, longer leaves adapted to maximise fibre yield. Its cultivation in El Salvador was promoted in the first half of the 20th century as an alternative to African sisal. The marginata variety (A. letonae var. marginata) is an ornamental form with yellow-margined leaves grown in gardens."
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Scientific Integrity
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Sources
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Discussion
Disclaimer
This species record is provided for educational and informational purposes only. Jardín Roca Negra does not guarantee the accuracy or completeness of the data. Content is community-curated and may be subject to revision; it should not replace advice from a qualified botanist. This species may be toxic, invasive, or subject to legal restrictions — verify before handling or cultivating. Jardín Roca Negra accepts no liability for any harm arising from reliance on this information. Images are reproduced under Creative Commons or equivalent free licenses; credits are noted below each image.