Purple Shamrock
Oxalis triangularis
Triangularis
About this plant
Oxalis triangularis, commonly known as Purple Shamrock, is a striking perennial plant known for its deep purple, triangular-shaped leaves that fold up at night or in low light. It produces delicate, pale pink or white flowers that add charm to its appearance. This plant is popular as a houseplant and for ornamental use in gardens due to its unique foliage and easy care requirements.
Taxonomy
- Genus
- Oxalis
- Family
- Oxalidaceae
- Higher classification
- Order: Oxalidales
- Plant type
- Houseplant
- Lifespan
- Perennial
Origin & Distribution
- Native region
- South America
- Distribution
- Widely cultivated worldwide as a houseplant and garden ornamental, originally native to South America.
Care
- Light preference
- Bright indirect
- Suitable locations
- Indoor, Balcony, Greenhouse
- Preferred window facing
- East-facing, North-facing, Northeast-facing
- Watering frequency
- Moderate
- Watering interval
- 4–7 days
- Humidity
- Normal
- Minimum
- 10 °C
- Maximum
- 30 °C
- Optimal
- 15-24 °C
- USDA hardiness zones
- 7-10
- Soil pH
- 6.0-7.0 (slightly acidic to neutral)
- Soil type
- well-draining potting soil mix
Watering. Water when the top inch of soil feels dry. Avoid overwatering to prevent root rot. Reduce watering during dormancy in winter.
Fertilizing. Feed the plant with a balanced, water-soluble fertilizer every 4 to 6 weeks during the growing season (spring and summer). Reduce feeding in fall and winter when the plant is dormant.
Oxalis triangularis is a hardy and easy-to-care-for plant that thrives in bright indirect light but can tolerate some shade. It prefers well-draining soil and moderate watering, allowing the soil to dry slightly between waterings. Overwatering can cause root rot, so avoid keeping the soil constantly wet. It requires minimal maintenance and occasional fertilizing during the growing season.
Propagation
- Propagation methods
- Division, Seeds, Cuttings
- Care difficulty
- Easy
Ornamental features
- Flowering
- Yes
- Flowering period
- spring
Distinctive deep purple triangular leaves that fold at night, delicate pale pink or white flowers.
Toxicity & Safety
- Toxic to humans
- Mildly toxic
- Toxic to pets
- Mildly toxic
- Weed potential
- Not considered a weed
The plant contains oxalates which can be mildly toxic if ingested in large amounts; keep away from pets and children to prevent accidental ingestion.
Allergy information
- Allergy risk
- Low
- Allergy triggers
- Sap or latex, Skin contact
- Pollen level
- Low
Oxalis triangularis may cause mild skin irritation in some people who are sensitive to its sap. The plant's pollen is not a common allergen. To reduce exposure, avoid direct contact with the sap and wash hands after handling the plant.
Common problems
Common problems include overwatering leading to root rot, yellowing leaves from too much direct sun, and occasional pests like aphids or spider mites.
Uses
Primarily grown as an ornamental houseplant for its attractive foliage and flowers. It can also be used in shaded garden beds or containers.
Notes
The plant goes dormant in winter; reduce watering during this time. Repot every 1-2 years to refresh soil. Avoid direct harsh sunlight to prevent leaf burn.