Agave durangensis

Agave durangensis is a species of Mexican origin that grows to a large size. It is highly ornamental with an imposing and remarkably striking silhouette. Perfectly adapted to dry and hot climates and poor soils, it develops a large rosette made up of large and wide, rigid leaves with a slightly undulating appearance. Both sides of the leaves are armed with large dark red spines, and a terminal spine of the same colour, which contrast well with the grey-green or glaucous green foliage. With moderate hardiness, this agave will be happy in a sunny location with well-draining soil.

Agaves belong to the Asparagaceae family (formerly Agavaceae), which includes other ornamental genera such as Yucca or the more obscure Furcraea. There are about 270 species of agaves that grow naturally in Central America and the Caribbean (Mexico, Guatemala, Cuba, Antilles), further south in Colombia, and further north in the United States (California, Arizona).

Agave durangensis is native to two states in central Mexico: Durango, which gave it its species name (locals call it "cenizo"), and the neighbouring state of Zacatecas, where it is used for making mezcal, a traditional spirit. It grows at altitudes between 1700 and 2600m (5578ft and 8530ft), in fairly dry rocky areas, but also near pine or oak forests. It is a perennial plant that forms large rosettes reaching an average height of 1.2m (4ft) with a spread that can reach up to 1.8m (6ft). The large leaves are erect in the centre but spread widely to the horizontal, almost touching the ground, at the periphery. Measuring up to 90cm (36in) in length and 23cm (9in) in width, they widen in their middle part. Although very rigid, they have a certain grace with their undulating shape reminiscent of a cobra snake. They bear large, sharp, dark red spines all around their periphery, which develop on small projections on the leaf blade. These straight or slightly curved spines create a superb contrast with the glaucous colour of the foliage, which ranges from grey-green to more or less bluish green depending on the subjects. The terminal spine is even more formidable. It is very long and slightly undulating, and of the same colour as the lateral teeth. It is so fierce that is capable of piercing through any glove!

A semelparous plant, it flowers after 15 to 25 years on average, signalling the end of the rosette, which then dies... but what a flowering! In this species, the flower spike can reach up to 8m (26ft) in height, branching horizontally to produce from 20 to 30 flattened panicles of light yellow flowers. This swan song lasts several months, usually from June to November, and then the offsets from the base take over from the main rosette, which withers, and the plant's cycle starts again.

In mild climates, Agave durangensis will find its place in a large rock garden, or as the central feature in a dry garden, where its monumental silhouette will stand out against the blue sky. It will also be perfect in a contemporary setting, where it can be paired with other structural plants such as Japanese Sago Palm (Cycas revoluta), a majestic plant with a palm-like appearance, straight out of prehistoric times. Yucca torreyi, a little-known species but interesting for its hardiness, will also be a good companion with its long, slender leaves and abundant flowering. And to enhance the dry garden aspect of your scene, opt for prickly pear cacti (Opuntia) with their characteristic ornamental appearance and ephemeral but beautiful flowers.