Albuca SETOSA

Albuca SETOSA - Bristly albuca, Albuca setosa.

A very unusual plant!

Albuca is a genus of monocotyledonous plants in the Asparagus family (Asparagaceae), with 100-120 species distributed predominantly in South Africa, where they have the local name 'temaraka'; a small number of species occur in tropical Africa and on the Arabian Peninsula.

In many species, the white flowers with a green stripe or margin closely resemble the flowers of star-of-Bethlehem (Ornithogalum), to which albuca was long assigned, placing it first in the lily family (Liliaceae) and then in the hyacinth family (Hyacinthaceae). The size of the genus was estimated at various times between 30 and 100 species; according to recent data, there are more than 150.

These are bulbous plants with succulent leaves from 8 cm (3.1 in) to 1.2 m (3.9 ft) long, flat or with keeled projections. The curly spiral-twisted leaves possess great ornamental value. The degree of leaf curling depends on heat, amount of light, and the plant clone. The sap is sticky.

Flowering occurs in spring - a thick, fleshy, glaucous peduncle up to 60 cm (24 in) tall emerges, bearing a loose raceme comprising up to 10-20 nodding flowers 3 cm (1.2 in) in diameter, arranged on pedicels up to 4 cm (1.6 in) long with small pointed bracts. The corolla is bell-shaped, with 6 petal-like lobes arranged in two whorls - three flaring lobes bent almost horizontally, and three drooping downward, covering 3 long stamens and the pistil. The flowers are self-pollinating.

The coloration of the corolla ranges from pale yellow to greenish, with a broad green stripe along the center of the petals and yellow edges. The flowers have a faint creamy-vanilla scent reminiscent of sweet butter cookies. Interestingly, fragrances in albucas are complex, difficult to describe, and exclusive to species with yellow-green flowers; white-flowered species are odorless.

After flowering, fruits form - small capsules containing shiny black seeds.

Albuca setosa is a perennial bulbous plant. During the hot period of the African summer, it enters dormancy, shedding its foliage and preserving its round, flattened, whitish bulbs in the ground. With the onset of cool, dry winter weather, fibrous white roots grow out, and by spring the plant revives, forming a basal rosette of twisted leaves.

Seeds are sown on the surface of a succulent potting mix, moistened with a spray bottle, covered with film, and germinated in light, but not in direct sun, at a temperature of 26-28 °C (79-82 °F). Sprouts require ventilation. It is necessary to avoid waterlogging and drying out of the sowings.

Seedling emergence takes from 2 weeks to several months. Seedlings are watered very carefully, avoiding waterlogging. Initially, the leaves emerge straight and begin to twist only after several months, provided bright lighting is present. A small bulb forms in the very first year. Flowering occurs in the 3rd year.

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Albuca cannot tolerate temperatures below 5 °C (41 °F), so in northern latitudes it is suitable only for a windowsill or, more likely, a cool greenhouse.

Growing conditions must imitate the natural environment and life cycle. The main challenge is creating cool conditions during the growing period. To achieve flowering in April, the following conditions must be provided starting in late November or early December: during the day, the temperature should not exceed 10-15 °C (50-59 °F); at night, a drop to 6-10 °C (43-50 °F) is permissible. An essential aspect is sufficient light, with optimal illuminance in the range of 2,500 to 3,500 lux.

The substrate must be light, permeable, and well-drained, containing coarse sand. A mix for succulents is well-suited. Watering must be limited (as this is a desert plant), becoming more generous only during active growth. Overwatering is strictly impermissible. Fertilizing is carried out using specialized fertilizers for succulents containing low concentrations of minerals.

Flowering begins 5 months after planting the bulb and occurs in April-May. It is long-lasting, about 10 weeks. At the end of flowering, one last fertilizing is given and watering is reduced. Once the foliage withers away, watering is suspended until late autumn; during this time, the pot with the bulb can be stored at room temperature. In late autumn, the plant is repotted into fresh substrate, watering is gradually resumed, and it is moved to a well-lit cool windowsill.