Ferocactus stainesii var. pilosus - Mexican fire barrel cactus

Ferocactus stainesii var. pilosus is a cactus native to the semi-desert regions of Mexico. This variety is recognisable by its long, bright red thorns and its hairy appearance, due to an abundance of fine white bristles. Becoming columnar with age, it can reach several metres in height when planted in the ground. Well-suited to dry gardens and exotic rockeries, this Ferocactus can also be grown in pots on a terrace or in a greenhouse. Moderately hardy (-6°C), it requires protection against moisture in winter.

Ferocactus stainesii var. pilosus belongs to the Cactaceae family. Native to northern Mexico, the species is found in the states of Coahuila, Durango, Nuevo León, San Luis Potosí, Tamaulipas and Zacatecas, where it thrives on semi-desert limestone rocky hills. This cactus has a globular habit, eventually becoming columnar, reaching 2 to 3 m in height when planted in the ground, with a diameter of 30 to 50 cm. In pots, its size remains more modest, generally around 1 m in height. The growth of this species is slow. The fleshy stems are dark green, composed of 13 to 20 well-defined, slightly wavy ribs. The areoles, located on these ribs, are close together and almost touching in older specimens. The six to twelve central thorns are robust, slightly curved and measure up to 5 cm long. They are initially bright red or purple, then become yellowish with age. The radial thorns are often reduced to long whitish hairs, giving the plant its characteristic "furry" appearance. The flowering, which occurs in summer, takes the form of bell-shaped, orange flowers, measuring up to 4 cm long and 2.5 cm in diameter, arranged in a circle around the top of the plant. If conditions are right, yellow, ovoid, 3 to 4 cm long edible fruits will form. This cactus flowers quite easily outdoors if planted in full sun in well-drained soil that remains fairly dry in winter. Indoors, place it in a cool room near a south-facing window in winter and reduce watering to respect its dormancy period. A temperature difference between day and night stimulates flowering, as does slight water stress in spring before resuming watering.
This species is used by some local populations as a source of water and food for livestock, particularly goats, in the semi-desert regions of Mexico.

Ferocactus stainesii var. pilosus can be grown in the ground in a true Mediterranean climate, where frosts are rare and mild. It can also be planted in a pot that is wider than it is deep, taken outside during summer and brought back indoors in autumn to a bright, unheated room. This "ferocious cactus" makes a striking focal point in an arid garden. Planted on a bed of light gravel, it evokes the ruggedness of Mexican landscapes. Pair it with Agave 'Kikijokan' , which resembles a large spiny artichoke, and with Dasylirion longissimum, whose fine cascading leaves soften its rigid habit. To add a floral touch to the scene, choose Echinocereus rigidissimus ‘Rubrispinus’, for example, with its pearly pink flowers.