genus that brings together about twenty columnar cacti originating in South America. In the ring they reach dimensions greater than 2-3 m in height, while in pots they remain below the meter. They are fairly slow-growing plants, the stem is green, with numerous ribs, usually erect, solitary, sometimes it produces some branches that tend to grow parallel to the main stem; the areolas are very thorny, with a particularly developed central spine, and are covered by a thick whitish hair. The plants of several years of age in spring produce a pseudocephalio in the apical zone, from which numerous flowers bloom, of medium dimensions, almost hidden from the down, that bloom at night. In summer, small roundish fruits, fleshy, edible, which contain numerous dark seeds, occur.
Display and Watering
Exhibition: the exposed ones need very sunny positions; in winter the minimum temperature must be kept around 10-12 ° C, therefore the plants must be brought indoors or in a temperate greenhouse.
Watering: during the winter, these plants should not be watered, especially if they are not in a place that is too thick. With the arrival of heat the watering must instead be regular, leaving the soil to dry very well between one watering and another. From March to October, provide specific fertilizer for succulent plants dissolved in the water used for watering every 15-20 days.
They prefer very well-drained soils, consisting of balanced soil mixed with sand and lapillus. These plants tend to produce a fairly large root system, so it is advisable to repot them every spring, placing them in quite large pots.
Hairy cacto - Espostoa lanata: Multiplication and Pests and diseases
Multiplication: takes place by seed, in February in a seedbed in a sheltered place, or in spring-summer. It is also possible to practice cuttings, using the side branches, which must be rooted in a mixture of peat and sand in equal parts
Pests and diseases: pay close attention to cochineal, which lurks in the hair, becoming very difficult to spot.