Oxalis triangularis Mijke, commonly known as the Purple Shamrock or False Shamrock, is an elegant ornamental plant native to South America. A member of the Oxalidaceae family, this variety is admired for its rich, velvety purple foliage and delicate pale pink or white flowers. The Mijke cultivar is a refined selection known for its particularly deep, vibrant colouration and compact growth. The plant features distinctive triangular, clover-like leaves that fold closed at night or during low light a fascinating movement known as nyctinasty. By day, the leaves open wide to reveal their satiny texture and jewel-like tones, creating a dynamic and ever-changing display. In spring and summer, slender stems rise above the foliage, bearing clusters of soft pink blooms that contrast beautifully with the dark purple leaves. Compact and easy to grow, Oxalis triangularis Mijke makes an ideal choice for windowsills, tabletops, and containers, bringing a touch of sophistication to any setting. Oxalis triangularis Mijke Care Guide Light Thrives in bright, indirect light. It can tolerate gentle morning or late-afternoon sun, which enhances the rich purple leaf colour. Avoid harsh midday sunlight, which can fade or scorch the foliage. Watering Keep the soil lightly moist during the growing season. Water when the top 23 cm of soil feels dry. Reduce watering in winter when the plant becomes dormant and leaves naturally die back. Temperature and Humidity Temperature: Prefers 1826C. Avoid temperatures below 10C, especially during dormancy. Humidity: Adapts well to average indoor humidity levels. Soil and Potting Use a light, free-draining peat-free compost. Adding perlite or grit improves drainage. Repot every 23 years in spring, separating the small tubers (rhizomes) if you wish to propagate new plants. Feeding Feed every 46 weeks in spring and summer with a diluted balanced fertiliser. Stop feeding during the dormant winter period. Pruning and Maintenance Remove faded flowers and old leaves at the base to keep the plant tidy. If the plant enters dormancy and loses all its leaves, reduce watering completely and store in a cool, dry place until new shoots appear (usually after 68 weeks). Growth and Maturity A fast-growing, compact plant reaching 1525 cm tall and wide. With proper care, it will regrow each year from its tubers. Common Issues Yellowing leaves: Overwatering or poor drainage. Pale foliage: Too little light. Leaves closing in daylight: Sign of stress, such as overwatering or temperature changes. Pests: Occasionally aphids or spider mites. Background and Benefits Oxalis triangularis is native to Brazil and other parts of South America and has long been prized for its beauty and movement. The Mijke variety is particularly valued for its darker, more uniform purple foliage. Compact, hardy, and endlessly elegant, it adds a graceful, decorative touch to indoor spaces and patios alike. Quick Care Summary Light: Bright, indirect; tolerates gentle sun Water: Lightly moist; reduce during dormancy Temperature: 1826C; avoid below 10C Humidity: Average indoor Soil: Light, free-draining compost Feed: Every 46 weeks in spring/summer Growth: Compact perennial, 1525 cm; deep purple triangular leaves and pale pink flowers