Cyrtanthus SPIRALIS

Cyrtanthus SPIRALIS - Spiral cyrtanthus, Cyrtanthus spiralis.

Cyrtanthus is a genus of monocotyledonous flowering plants in the amaryllis family (Amaryllidaceae). There are more than 50 species in the genus. Cyrtanthus is distinguished by a large, elongated-ovoid bulb with reddish scales at the neck. Long dark green leaves, purple at the base, up to 3 cm (1.2 in) wide and up to 40 cm (15.7 in) long, are gathered in a basal rosette. In some species, the leaves are very narrow and smooth, while in others they are wide and twisted into a spiral. The color of the leaf blade can be in a green palette of varying saturation - from bright green to matte and dark green. The length of the leaf blades can reach 40-50 cm (15.7-19.7 in); as the plant grows, the lower row of leaves dies off, forming a scaly stem at the base of the bulb.

Daughter bulblets form after flowering ends and grow on long thin stalks closer to the top of the bulb. They protrude above the soil surface and root very quickly. The roots pull the young bulblets into the soil. There can be 10-12 offsets. They can be separated during repotting. If this is not done, the plant expends much energy nourishing them, which hinders flowering.

Spiral cyrtanthus is a bulbous perennial up to 60 cm (23.6 in) tall. The leaves are basal, spiral. Bright red funnel-shaped flowers gathered in a corymb are positioned on gracefully arched peduncles.

Seeds are flat, about 6-8 mm (0.24-0.31 in) long, dark, thin, often with a slight "papery" structure, arranged numerously in the capsule. Germination rate is usually high - about 70-90% under proper cultivation practices. With seed propagation, cultivar characteristics of the bulbs are not preserved, but specimens obtained this way age more slowly and grow faster.

Before sowing, optional soaking for 6-12 hours in warm water with the addition of stimulants (SUPERthrive, HB-101, Aminosol, Epin, or Zircon) can be performed; then the seeds are sown in a light, well-drained substrate with sand or perlite, covered with a layer of seed mix about 3-4 mm (0.12-0.16 in) deep, moistened with a spray bottle, placed in a propagator or covered with film, and germinated in light, but not in direct sun, at a temperature of 18-22 °C (64-72 °F). To reduce the risk of rot, seedlings require ventilation. It is necessary to avoid waterlogging and drying out of the sowings; water stagnation is not permitted.

Seed germination usually takes place within 4 weeks - the typical minimum period for seedling emergence is about 3 weeks, and the maximum possible can be more than 60 days. After rooting and the formation of 2-3 leaves, pricking out into individual containers is carried out so that the root system develops without competition. Transplanting is done carefully, as young roots are easily damaged. In the early years, growth is supported without drying out, as young bulblets develop better under an even moisture and light regime. Under ideal conditions, the first flowering of seedlings is often observed in their third growing season.

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Cyrtanthus is extremely unpretentious and presents no difficulties in cultivation.

The optimal temperature for maintenance in summer is 21-22 °C (70-72 °F), and in winter the temperature should not fall below 12 °C (54 °F). It belongs to plants that fear sharp temperature fluctuations and drops. In summertime, it can be taken out to a balcony or terrace, while protecting it from direct sunlight, wind, and precipitation; the pot can also be dug into garden soil under trees. It is a light-loving plant whose floral abundance directly depends on lighting intensity. During the flowering period, a south or east windowsill suits it perfectly. In insufficient light, the plant does not bloom or flowering is sparse. The plant must be rotated regularly so that the leaves develop evenly.

During the period of flowering and active development, it is necessary to maintain uniform substrate moisture. Watering should be conducted frequently and generously, but between procedures the upper soil layer must have time to dry out. Neither complete desiccation nor waterlogging of the soil ball should be allowed. It is necessary to water with warm, soft, settled water, making sure water does not touch the bulb. Water from the tray must be drained after watering. Cyrtanthus does not require increased air humidity, but at temperatures above 25 °C (77 °F) during the flowering period, it needs to be sprayed or placed on a tray with moist expanded clay (the bottom of the pot must not touch water). It is necessary to clean dust from the leaves regularly.

Fertilizing is necessary during the period of flowering and active growth once every 2 weeks. Fertilizers must be applied through the tray by immersing the plant in a container with fertilizer for 20 minutes, and then allowing the excess to drain. For feeding, compound fertilizers for flowering plants are used. The plant responds well to organic fertilizers. The soil must be nutritious and well-drained. Universal substrate or potting soil for foliage plants will work, with added charcoal, coconut coir, pine bark, sphagnum moss, and perlite. Good drainage at the bottom of the pot is required.

The plant is repotted annually if it develops actively and blooms profusely. Young bulblets that have just been potted are repotted only after 2-3 years. During repotting, daughter bulblets must be separated if present. The pot is chosen to be neither deep nor wide; its diameter should exceed its height. Cyrtanthus is usually grown in pots about 10 cm (3.9 in) in diameter. The distance between the bulb and the pot wall should not exceed 3 cm (1.2 in). The bulb is buried by 1/3 when planted. After repotting, watering must be careful until plant growth resumes. In a snug pot, the plant blooms sooner.