Agave vilmoriniana (Octopus agave)

Agave vilmoriniana, the octopus agave, grows on canyon cliffs in western and north-western Mexico. A US grower describes long, narrow green leaves that arch back and twist toward the ground, making the plant look like an octopus with outstretched tentacles, about 1.2 m tall and wide. The arching leaves are deeply furrowed and lack obvious teeth, though the margins can have small serrations and be fairly sharp. The plant dies after flowering and produces no offsets, but many bulbils form on the flower stalk, and plants grown from them are said to flower in about 7-10 years. In the wild it grows in canyons at roughly 600-1,700 m in Sonora, Chihuahua, Sinaloa, Jalisco, Durango, Nayarit and Aguascalientes, where colonies on cliffs have been likened to giant spiders on a wall. It was named in 1913 after the French horticulturist Maurice de Vilmorin. The leaves are rich in natural soap-like compounds, and in Mexico the fibres have been beaten into brushes with built-in soap. A variegated form, 'Stained Glass', also exists. In Japan seedlings are sold by garden centres and online shops.

Source: Wikipedia (CC BY-SA 4.0)

The Agave vilmoriniana (Octopus agave) grows to About 1.2 m tall and wide.

Light feeder; a little slow-release fertiliser in the growing season is enough