Plant Care Guides 🌿

Oxalis Triangularis (Purple Shamrock): Care, Maintenance & Propagation

Oxalis Triangularis, often known as the Purple Shamrock, is a lovely and intriguing houseplant. It’s known for its vibrant foliage and its ability to fold and unfold like butterflies in response to light.

Keep reading to find out how to make this stunning plant thrive in your home.

1. General Information & Quick Care Guide

Scientific name:Oxalis triangularis
Common names:Purple Shamrock, False Shamrock
Toxicity:Toxic to pets if ingested
Mature size:Up to 0.5m in height and width
Growth Rate:Moderate
Watering Requirements:Moderate; allow top soil to dry between waterings
Light Requirements:Bright, indirect light; can tolerate some morning/evening sun
Humidity & Temperature:Tolerates a wide range of humidity; ideal temp 60°F-75°F (16°C-24°C)
oxalis triangularis plant

2. Oxalis Triangularis Care & Growing Requirements

  • Watering

Water Oxalis Triangularis when the top inch of the soil feels dry, and cut back on watering during its dormancy in the cooler months. Make sure to avoid overwatering, as it can lead to root rot.

  • Light

Oxalis thrives in bright, indirect sunlight. Place it near north, east, or west-facing windows, but avoid exposing it to prolonged direct sunlight to prevent leaf scorch.

  • Soil

Use a well-draining, slightly acidic to neutral potting mix for Oxalis Triangularis. A blend of regular houseplant soil with added perlite or coarse sand is ideal for drainage.

  • Temperature

Oxalis actually prefers a cooler environment, ideally between 60°F and 75°F (16°C to 24°C). Temperatures consistently above 80°F (27°C) can induce dormancy or stress the plant.

  • Humidity

Oxalis Triangularis is versatile with humidity, tolerating normal indoor levels. In very dry conditions, consider using a humidity tray or placing it near other plants to increase moisture.

  • Fertilizer

Fertilize Oxalis Triangularis every four waterings during the spring and summer with a balanced houseplant fertilizer. Reduce to every six waterings in the cooler months.

3. Oxalis Triangularis Maintenance and Propagation

  • Repotting

Oxalis Triangularis should be repotted every 2-3 years, preferably in the spring, to refresh the soil and give the roots more room to grow. Choose a pot that’s slightly larger than the current one to ensure adequate space for growth.

  • Pruning

Trim away yellow or dying leaves at their base. This not only keeps the plant looking tidy but also encourages new growth.

  • Propagation

The easiest way to propagate Oxalis Triangularis is through tuber division, during the repotting process when the plant is dormant.

4. Common Issues

  • Leaves Turning Yellow: Often a sign of overwatering. Ensure good drainage and reduce watering frequency.
  • Leaves Turning Brown: Could indicate underwatering or low humidity. Increase watering slightly and consider a humidity tray.
  • Drooping or Wilting: Typically a light issue. Ensure the plant receives sufficient bright, indirect light.
  • Dormancy Period: Don’t be alarmed if the plant appears to die back; this is its natural dormancy. Reduce watering and wait for new growth in spring.

5. Oxalis Triangularis Diseases & Pests

Common pests include spider mites and mealybugs. Treat with insecticidal soap or neem oil. Watch for root rot due to overwatering and ensure good soil drainage.


Caring for Oxalis triangularis can be a fun experience for any plant lover. By offering your plant a bit of TLC, you can ensure it thrives and remains a stunning feature in your home.

And if this one matches your aesthetics, make sure to check out our article on houseplants with green and purple leaves!

About Author

Hey there! I'm Denis, a lifelong plant lover and gardening enthusiast. I've been in love with gardening since the age of 10 when I successfully grew my first roses from cuttings. Since then, my passion has only grown stronger, and I now write articles about plants to share my knowledge and experiences with others.

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