Cyanotis sp.

Geographical Origin and Habitat: Species of the genus Cyanotis are primarily native to the tropical and subtropical regions of Africa, Southern Asia, and Australia. In nature, they grow in semi-arid or seasonally wet environments, often colonizing rocky crevices, sandy stream banks, and semi-shaded forest edges. It is not an aquatic plant in the strict sense, but rather a marsh or creeping plant that adapts excellently to high humidity environments as long as the roots are well drained.

Taxonomy & Genetics: It belongs to the Commelinaceae family, the same family as Tradescantia. The genus Cyanotis is distinguished by the presence of woolly or velvety hairs on the leaves and stems. The undetermined species commercialized as Cyanotis sp. retains the typical genetic robustness of the genus, adapting to high humidity conditions but requiring a dry or well-drained root zone to prevent rotting.

Physical Structure: It features fleshy and creeping or ascending stems, with leaves arranged alternately or spirally along the stem. The leaves are thick, lanceolate, and clasping at the base. The unique feature is the dense silvery hair (trichomes) covering the leaves and stems, which serves the biological function of retaining atmospheric moisture and protecting the plant from solar burns.

Color & Texture: The leaves have an olive green or grayish-green coloration on the upper side, due to the presence of silvery hairs, while the lower side can assume reddish or purplish hues under intense lighting. The texture is velvety and soft to the touch, offering a strong sensory and visual contrast against smooth-leaved plants.

Lighting & CO2: Requires moderate to intense lighting. Strong light promotes compact stem growth and enhances the density of the silver hairs and purple tones. It does not require CO2 injection as it is cultivated mainly in emersed or semi-emersed form in paludariums and terrariums.

Nutrition & Substrate: Requires a very well-drained substrate, such as a mixture of soil, sand, and volcanic gravel. Avoid

Water Chemistry: If grown in ripariums or hydroponics, it prefers soft to moderately hard water with a KH between 0 and 14 dKH and a slightly acidic to neutral pH (5.0-7.0). The optimal cultivation temperature is between 20°C and 30°C; it does not tolerate frost.

Space Management & Placement: Place in the midground or background of paludariums, terrariums, or on the shoreline of ripariums. Due to its creeping or cascading habit, it is ideal for covering rocks or damp walls, provided there is good air circulation to prevent moisture from stagnating on the leaf hairs.

Pruning: Trim by pinching the tips of the stems to encourage lateral branching. The cut portions root very easily when placed in a damp substrate or water, making propagation extremely simple and rapid.

Risks & Diseases: The main risk is soft rot of the stems and roots caused by excess stagnant water or poor ventilation. If the leaves remain constantly wet without air circulation, the hairs trap water, promoting fungal outbreaks. Keep the environment well ventilated.