Dudleya ALBIFLORA

Dudleya ALBIFLORA - White-flowered dudleya, Dudleya albiflora.

Dudleya is a genus of succulent plants in the Stonecrop family (Crassulaceae), numbering about 45 species native to southwestern North America, predominantly in California, the Baja California peninsula, and Mexico. Most species occur on rocky slopes, cliffs, and in coastal zones, where they form rosettes of fleshy leaves adapted to survival in arid conditions.

The leaves of dudleya are usually gathered into dense basal rosettes, which can be solitary or branching, forming clumps. The leaf shape varies from linear and lanceolate to spatulate and nearly cylindrical. The surface of the leaves is often covered with a white farinose or waxy coating that protects the plant from intense solar radiation and reduces moisture evaporation. This coating gives the plants a characteristic silvery or bluish-gray hue.

Flowering of dudleya occurs predominantly in spring and early summer. From the center of the rosette or from leaf axils, flower stalks rise, bearing corymbose or paniculate inflorescences. The flowers are bell-shaped or star-shaped, with five petals colored in white, yellow, pink, or red tones. After flowering, fruits form - many-seeded follicles.

In cultivation, dudleyas are valued for the ornamental quality of their rosettes and drought resistance. They are suitable for growing in rockeries, succulent gardens, and as indoor plants on brightly lit windowsills.

White-flowered dudleya is a small succulent plant only 15 cm (6 in) high. The stem is fleshy, becoming woody. The leaves are small, fleshy, with a silvery coloration. It blooms in spring and summer with medium-small white flowers.

Seeds are premixed with the top layer of planting mixture, then sown into sandy soil, moistened from a spray bottle, covered with film, and germinated under moderate humidity in light, but not in direct sun, at a temperature of 16-21 °C (61-70 °F). Seedlings need ventilation. It is necessary to avoid waterlogging and drying out of the sowings.

Seeds are very (!) small.

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Care for Dudleya under home conditions is not particularly difficult; in nature, it grows even on rocks and in desert zones. To maintain good form and a dense white farinose coating, the plant needs bright diffused sunlight. Exposure to direct sunlight is also permissible. In shade, the plant will not develop, stopping growth and beginning to languish. An excess of direct sunlight can be recognized by shriveled leaves, and a lack of lighting by drying out and bluishness.

During summer months, maintenance at room temperature is preferable, although the plant tolerates heat well and can comfortably exist at temperatures up to 35-37 °C (95-99 °F). It is important to provide an influx of fresh air. In winter, a dormant period sets in, for which optimal conditions are 10-15 °C (50-59 °F). Cooling below 5-7 °C (41-45 °F) leads to death, while warming above 20 °C (68 °F) exhausts the plant and shortens its lifespan.

Watering is performed as the substrate dries out. In spring and early summer once every 2 weeks, in the hottest months once a week. In autumn, watering frequency is reduced to a minimum, and in winter it is watered once a month only so that the plant does not dry up completely. With high humidity in the room, one can avoid watering the plant altogether during the cold season. Watering is performed with well-purified water at room temperature. Moisture must not get on the leaves to avoid stains and spots forming on the farinose coating.

Dudleya is insensitive to air humidity, existing well at average levels. In heat and high dryness of the air, drying out of leaf tips is possible, especially the lower ones. It is undesirable to tear them off while most of the leaf is alive. It is recommended to carefully trim off the dead portion. The plant must not be sprayed.

For cultivation, neutral or slightly acidic well-permeable soil is required, consisting of 2/3 soil substrate and 1/3 coarse sand and fine gravel. One can prepare the substrate independently from 1 part leaf mold, 1 part sod soil, and 1 part coarse sand. An important condition is good drainage, for which crushed brick is suitable, possessing the property of absorbing excess moisture that is fatal in large quantities to the roots of desert plants. Fine pebbles, vermiculite, or any other drainage material are also suitable.

There is no necessity for feeding. But any soil depletes over time, and slightly supplementing the soil with nutrients is still recommended. From spring to autumn, one can fertilize the plant once a month with a complex mineral formula for succulents or cacti with high potassium content.

The plant is characterized by a low growth rate; repotting may be required once every few years in spring. The procedure must be carried out carefully so as not to damage the very thin and fragile roots of the succulent and not to rub off the farinose bloom from the leaves, which could affect the overall well-being and appearance of the plant. A ceramic, unglazed, low pot, slightly wider in diameter than the previous one, is recommended. A drainage layer is mandatory.