Columnea karstenianum

A trailing gesneriad with lush, densely hairy stems and vivid tubular flowers perfectly adapted to attract hummingbirds in its natural habitat. Its cascading growth habit makes it an exceptional choice for hanging baskets or elevated shelves where its stems can drape freely and display blooms along their full length.

• Light: Moderate to bright indirect light; some morning sun is tolerated but avoid harsh midday exposure to prevent leaf scorch.
• Temperature: Intermediate to warm grower. Daytime 65–80°F (18–27°C), nighttime 58–65°F (14–18°C); a slight drop in nighttime temperature encourages blooming.
• Humidity: 60–80%; benefits from regular misting around the plant, though avoid wetting the hairy foliage directly to prevent rot.
• Watering: Water thoroughly when the top of the substrate begins to dry; reduce slightly in cooler months but never allow roots to desiccate completely.

Additional Notes

Found in humid montane forests at mid to high elevations; described by R.Kr. Singh (2023). Best grown in a well-draining, epiphytic mix of bark and perlite or mounted on cork bark.