Codonanthe devosiana is an attractive plant that makes a good addition to indoor gardens or terrariums. Native to tropical Southeastern Brazil, this member of the Gesneriaceae family, related to the African violet, is known for its delicate beauty and ease of care. Its trailing habit and charming flowers make it a good choice for hanging baskets or elevated displays.
Plant Characteristics
Codonanthe devosiana has a captivating appearance with its small, rounded, often shiny leaves along trailing stems. Foliage ranges from dark green to varieties with dark purple-green velvety leaves, like ‘Paula’, or red-tinged edges, like C. crassifolia. Delicate, bell-shaped flowers, typically white or pale pink, emerge from leaf axils, sometimes with yellow or maroon markings inside. These blooms can appear year-round. After flowering, it produces small, colorful orange or red berries.
A notable feature of Codonanthe devosiana is its myrmecophilous relationship with ants in its natural habitat. The plant produces seeds resembling ant eggs, prompting ants to carry them to their nests, often high in trees. Inside ant nests, seeds find ideal germination conditions, including stable temperatures, moisture, and rich organic matter. In return, the plant produces sweet nectar from glands under its leaves, providing food for the ant colony. Its roots also help structure and hold the ant nest together.
Growing Conditions and Care
Light Needs
Codonanthe devosiana thrives in bright, indirect light, mimicking its natural dappled canopy environment. Place the plant near an east-facing window or in a room’s interior with ample light from a south or west-facing window. If direct sunlight is unavoidable, a sheer curtain can diffuse intensity and protect foliage. Too much direct sun can brown leaf edges, while insufficient light may cause leggy growth and reduced flowering.
Watering Practices
Proper watering is important; Codonanthe devosiana prefers its topsoil to dry out slightly between waterings. While it tolerates short droughts, consistent moisture encourages better growth and more blooms. Avoid overwatering, as this epiphytic plant is sensitive to soggy conditions and can develop root rot. Water when the top inch or two of soil feels dry.
Soil Requirements
The ideal soil mix is well-draining, airy, and slightly acidic, reflecting its epiphytic nature. A suitable blend includes peat moss, perlite, and orchid bark, or an orchid mix. These ensure proper drainage and aeration, preventing waterlogging that harms roots. Coconut coir can also aid moisture retention while maintaining good drainage.
Temperature and Humidity
Codonanthe devosiana prefers warm, consistent temperatures, ideally 68°F to 77°F (20°C to 25°C) during summer. Avoid temperatures below 55°F (13°C), as cool weather is detrimental. High humidity is beneficial; dry air can brown leaf edges. Increase humidity by placing the plant in a bright bathroom, grouping it with other plants, or using a pebble tray.
Fertilization
During its active growing season in spring and summer, Codonanthe devosiana benefits from regular fertilization. Apply a balanced liquid houseplant fertilizer, diluted according to product instructions, every 2 to 3 weeks. The plant is not a heavy feeder, so err on the side of caution to prevent over-fertilization, which can burn roots. Fertilizing during cooler winter months is not necessary.
Propagation Methods
Propagating Codonanthe devosiana is typically done through stem cuttings, a straightforward method. Take a healthy stem cutting 4 to 6 inches long, ensuring at least three pairs of leaves. Remove leaves from the bottom inch or two to expose nodes. Cuttings can be rooted in water, with regular changes to prevent stagnation, or directly in a moist, well-draining soil mix. Placing cuttings in a warm spot with bright, indirect light and maintaining high humidity, possibly with a plastic cover, helps encourage successful rooting.
Common Problems
Codonanthe devosiana is generally resilient, but issues can arise from improper care or environmental factors. Yellowing leaves, particularly older ones, can signal overwatering, leading to root rot, or occasionally underwatering. If leaves appear flimsy or the plant shows root rot, reduce watering immediately and allow soil to dry significantly before rewatering. Brown leaf edges or tips often indicate insufficient humidity or dry air. Increasing ambient moisture through misting or a pebble tray can help.
Pest infestations can occur, though they are not frequent. Common pests include mealybugs (white, cottony masses) and spider mites (dusty leaves, yellowing, or fine webbing). Aphids might also be present, causing sticky residue and curled leaves. For mealybugs, dab them with a cotton swab dipped in rubbing alcohol. Combat spider mites by increasing humidity and using insecticidal soap or neem oil. Regularly inspecting the plant and maintaining good air circulation are helpful preventive measures.