Oxalis ‘Molten Lava’ is a captivating houseplant, known for its distinctive foliage. Its unique appearance makes it a favorite among plant enthusiasts seeking visual drama for their indoor spaces.
Distinctive Features of Oxalis Molten Lava
The visual appeal of Oxalis ‘Molten Lava’ stems from its deep, almost black or dark burgundy leaves, strikingly contrasted by fiery red or orange undersides. This coloration gives the plant its evocative name, resembling glowing embers. The trifoliate leaves, resembling shamrocks, add to its charming appearance.
A characteristic of this plant is its nyctinastic movement, often described as “sleeping.” The leaves fold downwards and close at night or in low-light conditions, then gracefully reopen when exposed to light. Small, delicate flowers, in shades of pink or white, may emerge, providing a subtle accent to the dramatic foliage.
Comprehensive Care for Vibrant Growth
Light Requirements
Oxalis ‘Molten Lava’ thrives in bright, indirect light to maintain its rich, vibrant coloration. Placing it near an east or west-facing window, where it receives gentle morning or late afternoon sun, is ideal. Too much direct sunlight can lead to leaf scorching, while insufficient light may cause the foliage to lose its intense color and result in leggy, stretched growth.
Watering Techniques
Oxalis ‘Molten Lava’ requires consistent moisture during its active growing season. The soil should be kept evenly moist, but never waterlogged, as this can lead to root rot. Before watering, check the top inch of soil; if it feels dry, water thoroughly until it drains from the bottom. During dormancy, watering should be significantly reduced or stopped.
Soil and Potting
A well-draining, airy potting mix supports the health of Oxalis ‘Molten Lava’. A blend designed for houseplants, containing peat moss, perlite, and vermiculite, provides good aeration and drainage. Choosing a pot with drainage holes prevents water accumulation. Terracotta pots can be beneficial due to their porous nature, which allows for better air circulation and moisture evaporation.
Temperature and Humidity
This plant prefers average room temperatures, ranging from 65°F to 75°F (18°C to 24°C). It is sensitive to extreme temperature fluctuations and cold drafts, which can stress the plant. Moderate to high humidity levels benefit its foliage. Grouping plants together or placing the pot on a pebble tray filled with water can help increase ambient humidity around the plant.
Feeding and Fertilization
During the active growing period in spring and summer, apply a balanced liquid fertilizer every two to four weeks. Dilute the fertilizer to half the recommended strength to prevent over-fertilization. Cease all fertilization during the plant’s dormant period to avoid nutrient build-up and potential root burn.
Understanding Dormancy
Oxalis ‘Molten Lava’ naturally enters a period of dormancy, a part of its life cycle. This phase occurs when light levels decrease or temperatures change, signaling the plant to rest. During dormancy, the leaves may wilt, yellow, and completely die back, which is a normal process.
When the plant shows signs of dormancy, gradually reduce watering, and stop fertilization entirely. The corms, small bulb-like structures underground, store energy during this time. The pot containing the dormant corms can be stored in a cool, dark place for several weeks to a few months. New growth will emerge once conditions become favorable again, signaling the end of dormancy.
Propagation Methods
Propagating Oxalis ‘Molten Lava’ is achieved through the division of its corms. These small, bulbous structures grow underground and can be separated to create new plants. The ideal time for propagation is during the plant’s dormant period or when repotting.
To propagate, gently unearth the corms from the soil, carefully separating them into individual units. Each corm has the potential to sprout new foliage. Replant these separated corms into fresh, well-draining potting mix, ensuring they are covered with about an inch of soil. After replanting, a light watering encourages root development, and new shoots should emerge within a few weeks.
Troubleshooting Common Challenges
Loss of vibrant color in Oxalis ‘Molten Lava’ indicates insufficient light exposure. Moving the plant to a brighter location with indirect sunlight helps restore its rich hues. Wilting or drooping leaves can signal either under-watering, where the plant is thirsty, or over-watering, which leads to root issues.
Leggy growth, characterized by stretched stems and sparse foliage, is a symptom of inadequate light. Providing more bright, indirect light will encourage more compact and robust growth. Common houseplant pests like spider mites or aphids can affect Oxalis; inspecting the leaves regularly and treating with insecticidal soap can manage infestations. Yellowing leaves can indicate over-watering, a nutrient deficiency, or the natural aging process of older foliage.