Iron Cross Oxalis (Oxalis tetraphylla)

Iron Cross Oxalis

Oxalis tetraphylla

Its four-lobed leaves form a charming cross, a cheerful low-growing ornamental. Common name: Iron Cross Oxalis, Lucky Clover.

Partial sun
2/week
Beginner
🌱

Plant Needs

☀️
Sunlight Bright indirect light; tolerate partial shade, avoid intense midday summer sun to prevent leaf scorch
💧
Watering Water when the top 1–2 cm of soil feels dry; avoid overwatering to prevent bulb rot
🌡️
Temperature Thrives in 15–22°C; tolerate brief dips to 5°C, but protect from frost damage
🔍

Characteristics

  • Leaf: Four heart-shaped leaflets forming a cross-like pattern; green with maroon central markings; folds at night.
  • Flower: Pale pink to white funnel-shaped blooms, borne on thin upright stems.
  • Stem: Slender, delicate green stems; grows from underground bulblets.
🛠️

Care Guide

Watering

Keep soil evenly moist but not waterlogged

Fertilization

Diluted balanced liquid feed every 2 weeks. Discontinue fertilization in late summer as the plant enters dormancy

Eggshell powder topdressing:Crush clean, dried eggshells into fine powder; sprinkle a thin layer on soil surface, avoiding direct contact with bulbs to prevent irritation
Pruning
  • Remove spent flower stems promptly to encourage continuous blooming
  • Trim yellowing or damaged leaves to maintain a tidy clump
  • Lift and divide overcrowded bulblets in late summer to promote healthy growth
⚠️

Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA: Toxic; oxalate crystals cause oral pain, hypersalivation, vomiting, and difficulty swallowing

Humans: Contains calcium oxalate crystals; causes mild oral and throat irritation if ingested; may trigger skin irritation in sensitive individuals

📖

Garden Uses & Culture

Culture: Symbolizes good fortune and luck due to its clover-like cross-shaped leaves

Usage: Ornamental ground cover, indoor container plant, or rock garden accent