Spring has fully arrived, and with it comes a new Plant of the month at Planteka! For April, we’ve chosen the magical Oxalis triangularis, also known as the false shamrock or purple shamrock. With its deep purple, butterfly-shaped leaves and charming pink or white flowers, this unique plant adds movement, colour, and personality to any home.

Did you miss last month’s feature? In March, we explored the fast-growing and hole-filled beauty of the Monstera adansonii. Don’t forget to check it out here.

Origin and history of Oxalis triangularis

Oxalis triangularis is native to South America, particularly Brazil, and belongs to the Oxalidaceae family. Though often mistaken for a clover, it’s not related to true shamrocks. Its name comes from “oxys,” the Greek word for sour, due to the slightly acidic taste of its leaves (note: not for snacking unless you’re sure of the variety!).

Often associated with luck and charm, Oxalis triangularis has long been appreciated not only for its ornamental beauty but also for its curious behaviour—its leaves open during the day and close at night, mimicking a butterfly in motion.

Characteristics of Oxalis triangularis

Triangular, deep purple leaves – Their butterfly-like shape and rich colour make this one of the most eye-catching houseplants.

Leaf movement – A fascinating feature: it opens during the day and folds up at night in response to light levels.

Delicate blooms – Produces small, trumpet-shaped pink or white flowers that contrast beautifully with its dark foliage.

Compact size – Perfect for desks, shelves, or windowsills.

Grows from bulbs – Dies back seasonally but comes back stronger with the right care.

How to care for Oxalis triangularis

While it looks exotic, Oxalis triangularis is quite easy to care for if you understand its seasonal rhythm.

1️⃣ Light

✔️ Loves bright, indirect light—a north or east-facing window is ideal.
✔️ Can tolerate some direct morning sun, but avoid harsh afternoon rays.
💡 If the leaves become pale or limp, it likely needs more light.

2️⃣ Watering

✔️ Keep the soil evenly moist during its active growth period (spring to autumn).
✔️ Let the top 2-3 cm of soil dry out before watering again.
🚫 Avoid overwatering—Oxalis bulbs are prone to rot if the soil stays soggy.

3️⃣ Dormancy

Oxalis triangularis often goes dormant once a year, especially in colder months.
✔️ When leaves wilt and die back, it’s not dead! Stop watering, store the pot in a cool, dark place, and wait 4–6 weeks.
✔️ Resume watering gradually when new shoots appear.

4️⃣ Soil and pot

✔️ Use a well-draining mix—a blend of universal potting soil with perlite or sand works great.
✔️ Make sure the pot has drainage holes to prevent rot.

5️⃣ Fertilizer

✔️ Feed monthly during the growing season with a balanced liquid fertilizer diluted to half strength.

Common issues & how to fix them

Yellowing leaves
Cause: Overwatering, too little light, or natural dormancy phase.
Fix: Adjust watering and light, or let it rest if it’s entering dormancy.

Leaf curling or closing during the day
Cause: Sudden change in light, temperature, or stress.
Fix: Move it to a brighter, more stable environment.

Wilting all at once?
Cause: Dormancy (normal).
Fix: Let it rest, reduce watering, and wait for it to regrow.

No flowers
Cause: Not enough light or underfeeding.
Fix: Move it to a brighter spot and fertilize more regularly.

Styling ideas: how to showcase Oxalis triangularis

Table centerpiece – Its sculptural shape makes it perfect for dining tables or shelves with good lighting.

Windowsill star – Place it in a decorative pot where light can catch the colours of its leaves.

Grouped with other plants – Combine with plants with contrasting green leaves (like Calatheas or Pileas) for a vibrant mix.

Gift idea – Its lucky charm reputation makes it an ideal present for housewarmings or new beginnings.

💚 Want to become a better plant parent this spring?

Oxalis triangularis is a wonderful plant for both beginners and experienced collectors. If you’re just getting started or want to feel more confident with your plants:

👉 Join our Gardening course for beginners — available online from anywhere or in person in Barcelona, Madrid, or Valencia. Learn how to understand your plants, build your care routine, and make your indoor jungle thrive.

🩺 Need help with your Oxalis? Our Plant Doctor service is here to help you troubleshoot, diagnose, and revive any plant issues with expert advice.

What do you think about this fascinating plant? Have you ever seen its leaves move?
Let us know in the comments or tag us in your Oxalis photos on Instagram @planteka.co! 🌿📸