Ludisia discolor var. nigrescens

Ludisia discolor var. nigrescens is the “black velvet” variety of the jewel orchid Ludisia discolor, a terrestrial species native from northern India to Southeast Asia. It is grown mainly for its very dark, velvety foliage with contrasting veins. The stems are fleshy and 20–25 cm long; the white flowers, approximately 2 cm across, usually last 2–3 weeks on 10–40 cm flower spikes.

It requires shade or filtered light, approximately 8,000–10,000 lux, with no direct sunlight on the leaves. Typical indoor temperatures are suitable; keep it away from radiators and cold drafts. Good air movement is important: stagnant air combined with wet leaves increases the risk of spotting. High humidity is beneficial, but many specimens adapt to moderate humidity if the substrate and ventilation are appropriate.

Water frequently, but allow the top layer of the substrate to dry between waterings. Do not leave water in the saucer or decorative cachepot. From autumn onward, gradually reduce the watering frequency. During active growth, fertilize with a diluted solution after watering, using orchid fertilizer. In winter, if growth slows, reduce watering and fertilizing without leaving the plant dry for weeks at a time.

Choose a shallow, wide pot with good drainage. The substrate should be loose and have moderate water retention. A suitable option is substrate for Ludisia, Vanilla and Paphiopedilum. Repot when new roots appear or when the mix has broken down. It is easily propagated from stem cuttings in moderate warmth and stable humidity.

The leaves are most commonly damaged by direct sunlight, water on the leaves in the evening, stagnant air, overwatering or extreme drying. It does not need to flower to be a good plant: many people grow it for its foliage; the flowers are a bonus.