The “Lucky Charms Plant,” botanically known as Oxalis triangularis, is a popular houseplant. Its distinctive appearance, featuring vibrant, often purple, triangular leaves that fold up at night and unfurl in the morning, makes it a favorite. This captivating movement, called nyctinasty, adds to its appeal. The plant also produces delicate, small flowers, typically white or pink, enhancing its ornamental value.
Understanding the “Lucky Charms” Connection
The common name “Lucky Charms Plant” stems from its visual resemblance to shamrocks. Oxalis triangularis is often called “False Shamrock” or “Purple Shamrock” because its trifoliate leaves, meaning three leaflets, look similar to true shamrocks (clovers in the genus Trifolium), though they are not botanically related. This likeness associates it with luck and St. Patrick’s Day symbolism. While true shamrocks are green, the striking deep maroon or purple foliage of Oxalis triangularis offers a unique interpretation. Its ability to close leaves at night also contributes to its charm.
Caring for Your Lucky Charms Plant
Light
Oxalis triangularis thrives in bright, indirect light. An east or west-facing window is often ideal, providing ample light without the harshness of direct midday sun, which can scorch its leaves. Faded or bleached leaves typically indicate too much direct light. Conversely, leggy growth with sparse foliage suggests the plant needs more light.
Watering
Consistent moisture is beneficial during the growing season, but allow the top inch or two of soil to dry between waterings. Overwatering can lead to root rot, yellowing leaves, and a droopy appearance. Under-watering might cause leaves to wilt and become crispy. It is better to slightly under-water than to over-water this plant.
Soil
A well-draining potting mix is crucial for Oxalis triangularis. A good blend includes standard potting soil mixed with perlite or coarse sand to improve drainage and aeration. This plant prefers a slightly acidic to neutral soil pH, typically between 6.0 and 7.0. Adequate drainage prevents waterlogging around the rhizomes, which are sensitive to excessive moisture.
Temperature and Humidity
Oxalis triangularis prefers average room temperatures, generally 65°F to 75°F (18°C to 24°C). Protect it from drafts or sudden temperature fluctuations. While it appreciates moderate humidity, typical household levels are usually sufficient. If the air is particularly dry, such as during winter heating, increase humidity by placing the pot on a pebble tray.
Fertilization
During its active growing season, typically spring through early fall, the Lucky Charms Plant benefits from regular fertilization. Use a balanced liquid houseplant fertilizer, diluted to half strength, every two to four weeks. This provides nutrients for robust foliage growth and flowering. Avoid fertilizing during dormancy or when it is not actively growing.
Propagating Lucky Charms Plant
Propagating Oxalis triangularis is straightforward, primarily through dividing its underground rhizomes or bulbs. The best time is typically when the plant is dormant, often in late winter or early spring, just before new growth emerges. Gently unearth the plant, carefully separating the small, pinecone-like corms from the main clump.
Plant individual corms pointed-end up, about 1-2 inches deep, in fresh, well-draining potting mix. After planting, provide light watering and place pots in a warm spot with indirect light. New shoots should emerge within a few weeks.
Dealing with Dormancy
The Lucky Charms Plant naturally enters a period of dormancy, which can sometimes alarm new owners. This normal cycle typically occurs when conditions become unfavorable, such as extreme heat, prolonged drought, or reduced winter light. During dormancy, leaves may wilt, yellow, and die back, appearing as though the plant is dying.
Gradually reduce watering and cease fertilization entirely. Move the dormant plant to a cooler, darker location for about two to three months. After this resting period, encourage re-emergence by moving the pot back to a bright, warm location and resuming regular watering. New shoots should appear within a few weeks, and the plant will return to its vibrant state.
Troubleshooting Common Issues
Wilting or drooping leaves not related to dormancy often signal inadequate watering or extreme temperatures. If the soil is dry, a thorough watering should help the plant recover. Yellowing leaves might indicate overwatering, leading to root issues, or a nutrient deficiency. Adjusting watering habits and ensuring proper drainage can often resolve this.
Pests are generally not a major problem for Oxalis triangularis, but common houseplant pests like spider mites or mealybugs may occasionally appear. Inspect the undersides of leaves and stems regularly. If pests are detected, treat the plant with an insecticidal soap or neem oil solution, ensuring thorough coverage. A lack of vigorous growth despite adequate care might suggest insufficient light or a need for fertilization during the active growing season.