Oxalis triangularis

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Oxalis triangularis is a truly unusual plant. It features dark purple, triangular leaves that resemble the shape of a shamrock. The leaves fold up at night and open back up during the day. Clusters of small, dainty, light purple flowers appear during spring and summer and provide great contrast against the dark leaves.

Size: 12cm pot x 20cm height

Origin: Southern South America 


Light: Bright but indirect light

Humidity: Low

Temperature: 14-22ºC

Watering: Allow the top 2-3 cm of the compost to dry between waterings when the plant is actively growing, usually from spring through autumn. Reduce watering frequency in winter when the plant goes dormant and the foliage starts to die off. Resume watering at the beginning of spring and new foliage will soon start to appear.

Feeding: Use half the recommended dose of a balanced liquid fertilizer every few weeks from spring through autumn.

Soil: Equal parts of soil-based compost and multipurpose compost. You can add a handful of horticultural grit.

Troubleshooting: Foliage will naturally die off in late autumn. You can cut it off and let the plant rest during the winter months.

Tip: This plant can be toxic if ingested, so we advise to keep it away from pets and children. Direct sunlight can leave sunburn marks on the leaves.

Did you know? Despite carrying the nickname of 'purple shamrock', Oxalis triangularis is not native to Ireland. The Latin name 'triangularis' refers to the triangular shape of the leaves. The leaves of Oxalis emerge from tiny bulbs, each bulb being parent to only 4 or 5 shoots!