All About Oxalis Triangularis: The False Shamrock
Introduction
Meet Oxalis triangularis, a stunning bulbous perennial that’s a joy to have as a houseplant. Its bold, dramatic foliage in shades of deep purple to wine-red creates a striking contrast to its delicate blush-white flowers that bloom in summer. The leaves are three-lobed, resembling a shamrock, hence its nickname “false shamrock.”
Growing Oxalis Triangularis
How to Grow from Bulbs
In spring, plant Oxalis triangularis bulbs pointed-end up, 5cm deep, in pots filled with peat-free, multi-purpose potting compost. Alternatively, plant them in fertile, free-draining soil outdoors in late spring.
Growing Conditions
- Indoors: Place in bright light but out of direct sunlight, which can scorch the leaves. Keep in a cool to warm room (15-21°C) and avoid draughts and sudden temperature changes.
- Outdoors: Site in sun or partial shade. Ensure good drainage to prevent overwatering.
Caring for Oxalis Triangularis
Watering
Water regularly, especially during the growing season, keeping the compost evenly moist but not waterlogged. Indoors, ensure good drainage by standing pots on saucers or trays of gravel.
Fertilizing
Feed every 3-4 weeks during the growing season with a liquid fertilizer high in potassium.
Dormancy
In autumn, Oxalis triangularis goes dormant in preparation for winter. Reduce watering and keep the compost almost dry over winter. Start watering again in early spring to encourage new growth.
Outdoor Care
If growing outside in pots, move them to a sheltered location such as a greenhouse or porch for winter.
Propagation
Propagate Oxalis triangularis by division while dormant in late winter. Split clumps of older plants into smaller clumps and replant them at the same depth.
Troubleshooting
Overwatering
Avoid overwatering, as it can cause plants to weaken and rot. Ensure good drainage and allow the compost to dry out slightly between waterings.
Varieties of Oxalis Triangularis
While the species Oxalis triangularis is widely available, there are also several named varieties with unique features, such as pink or yellow flowers. These varieties are usually sold as pot-grown plants.
Where to Buy Oxalis Triangularis
- Online nurseries: Order bulbs of Oxalis triangularis online in winter or early spring.
- Bulb suppliers: Check with local bulb suppliers for availability.
- Garden centers: Visit garden centers to find pot-grown Oxalis triangularis plants.
Conclusion
Growing and caring for Oxalis triangularis is relatively easy, making it a great choice for both beginners and experienced gardeners. Its striking foliage and delicate flowers add a touch of elegance to any indoor or outdoor space. By following these tips, you can enjoy the beauty of Oxalis triangularis for many years to come.
