The genus Haworthia has 80-90 species, originating in southern Africa. The name Haworthia derives from the famous Adrian Hardy Haworth, a specialist in succulent plants. It is, in fact, a perennial succulent consisting of a narrow rosette of fleshy leaves, generally triangular, thick, green, brown or greyish, depending on the species. Some species have white tubercles or light striations, some then have a particular shape, such as H. truncata, which has short spatula leaves. Many species of Haworthia tend to produce numerous basal shoots, making the plant ground cover; in general, each single rosette of leaves remains within a limited size: about 15-20 cm in diameter, for as many of maximum height. In summer, from the center of the leaves, a long, very thin, arched stem develops, on which some campanulate flowers of a pale, lilac or pink color bloom.
This type of plants prefers predominantly sunny exposures, even if, in summer and especially during the hottest hours, it is better to avoid direct exposure to sunlight. The Haworthia does not bear very low temperatures, for this reason in the coldest periods of the year it is good to withdraw the plant in very bright rooms and maintain a temperature that does not go below 8-10 C °.
Watering: from March to October water regularly, wetting the soil well, and waiting for it to dry perfectly between one watering and another; from the middle of July to the middle of August these plants generally have a period of vegetative rest, during which it is good to water sporadically, to prevent the development of root rots; from October until the following spring it is watered sparingly, keeping the soil mainly dry.
The methods for propagating this plant are different: by division, by sowing and by cutting; for pollen species, propagation by division is preferred, removing the suckers from the mother plant to repot them individually. Often the breakage of the stem bearing the flowers causes the development of a small rosette of leaves, from which a new plant will originate.
It has erect stems, which can reach up to 10-12 cm, very thick bluish-green leaves, which face upwards and have white streaks on the back.
Plant that reaches large dimensions, formed by a multitude of rosettes.
The rosettes are made of very lanceolate and pointed leaves, they are not very intense green, with a fairly regular fairing on the back.
Plant that presents groups of convex leaves (like barchette), very sharp, bluish green, not very long, 4 cm, with darker streaks.
Very similar to the previous one, but with longer and thicker leaves.
Haworthia arachnoidea: Haworthia Fasciata
Leaves even 10 to 12 cm long, tapered; the apex of the leaves is pointed. On the back of the leaf there are transversal white lines.