Oxalis triangularis
Oxalis triangularis
Oxalis triangularis is known for deep purple trifoliate leaves that open in the light and fold closed at night. It grows from small bulbs and can produce pale pink or white bell-shaped flowers that stand out against the dark foliage.
Light
Bright Indirect
Water
Moderate
Difficulty
Easy
Humidity
Moderate
Pet Warning
Contains calcium oxalates which are toxic to cats, dogs, and horses. Ingestion can lead to drooling, vomiting, and in severe cases, kidney failure.
Care Notes
Light
Place in bright, indirect light. Too little light stretches the stems and fades leaf color. Keep temperatures around 60°F to 75°F (15°C to 24°C).
Water
Water when the top inch of soil feels dry. During active growth, keep moisture steady but never soggy. Water much less during dormancy. Use a pot with drainage holes.
Soil
Choose a light, well-draining mix with perlite or sand so bulbs do not sit wet.
Humidity and Temperature
Moderate humidity is usually enough. If leaves yellow and die back, the plant may be entering dormancy. Stop watering, move the pot to a cool dark spot for 2 to 4 weeks, then resume care when new growth appears.
Common Issues
Yellowing leaves can mean overwatering or the start of dormancy. Leggy stems mean more light is needed.
In-Depth Care & Growth
Feeding & Soil
Fertilizer
Balanced liquid fertilizer (10-10-10)
Soil
Light, well-draining potting soil with perlite or sand.
Physical Attributes
Mature Size
6 to 12 inches
Growth Rate
Fast
Propagation
Division of the tuberous bulbs during the dormant or early spring phase.
Common Varieties
Mijke
Deep burgundy triangular leaflets with a darker purple geometric mark at the center of each leaflet.
Fanny
Light green triangular leaflets with silver-gray markings at the center of each leaflet.
Charmed Wine
Deep violet-burgundy trifoliate leaves with a sharp triangular, butterfly-wing shape.
Birgit
Bright green triangular leaflets with a darker green geometric splash at the center of each leaf.