Opuntia leucotricha - Prickly pear cactus

Opuntia leucotricha is a cactus which is recognisable by its large, elongated prickly pears covered in white down. This species originates from Mexico, is fast-growing, decorative, produces edible fruits and is relatively hardy in dry soil. It can be grown in the ground on a slope or in a large rockery in regions that are not too humid or too cold in winter. Elsewhere, it should be grown in a pot and stored indoors during winter.

Opuntia leucotricha, commonly known as the hairy prickly pear or white-haired prickly pear, belongs to the Cactaceae family. This species is endemic to Mexico, primarily found in the states of Coahuila, Durango, Jalisco, San Luis Potosí, Guanajuato, Tamaulipas, Zacatecas, Querétaro and Hidalgo. It thrives in xerophilous scrubland areas, characterised by an arid to very arid climate with annual rainfall below 400 mm, and is typically found at altitudes between 1,600 and 2,300 m. Opuntia leucotricha can tolerate temperatures as low as -10°C in dry soil. However, it struggles with prolonged wet and cold periods. This tree-like cactus has an open branching pattern and develops a slightly spreading crown with a well-defined, narrow and scaly, greyish-brown trunk. At maturity, it typically reaches a height of 3 to 5 m when grown in the ground. In cultivation, particularly in pots, its size is more modest, ranging between 1.5 and 2 m tall and 80 cm to 1.20 m wide, depending on growth conditions and available space. Its growth is rapid, with the plant capable of reaching 1 m in two years under optimal conditions. The cladodes, or prickly pears, are ovate to obovate, measuring between 18 and 28 cm long and 11 to 17 cm wide. Their colour is light green to greyish-green. The epidermis is downy, covered in fine granulations. The numerous, closely spaced areoles feature yellow glochidia on the upper part and flexible, flattened, waxy thorns, which can grow up to 3 cm long. In young specimens, the trunk is entirely covered in long yellowish-white hairs. Opuntia leucotricha flowers in spring or early summer, depending on the climate. The flowers are 4 to 5 cm long and similarly wide, pale pink with greenish and yellowish hues. The ovoid fruits measure between 4 and 6 cm in diameter. Their colour ranges from peachy pink to yellowish-green. They feature circular areoles, devoid of cilia or hairs, but with a greyish-white felt-like texture and yellow glochidia. These fruits are aromatic and edible, often sold in Mexican markets.

This species has traditional uses in Mexico. The fragrant fruits, known as "duraznillo blanco" or "duraznillo colorado" depending on their colour, are prized for their flavour. Additionally, Opuntia leucotricha is often cultivated as a local source of fuel.

Opuntia are "cacti" with a sharp silhouette, emblematic of the desolate and arid expanses of North America. They thrive in dry, southern gardens, in a large rockery or on a very dry slope. This white-haired prickly pear can also be used in front of a defensive hedge, making it extremely deterrent! They can be paired with rockroses, lavenders, rosemary, Teucrium, stonecrops and Mediterranean spurge. This plant should be kept away from pathways and children, due to its formidable thorns, and one should also be wary of the tiny, transparent, almost invisible ones that can easily penetrate the epidermis and are difficult to remove.