Purple Shamrock
Oxalis triangularis
Oxalis triangularis, also known as the Purple Shamrock, is a vibrant, low-growing plant native to South America. Its triangular, butterfly-shaped leaves range from rich violet to deep burgundy and move in response to light, opening in daylight and folding at night — a phenomenon called nyctinasty.
In addition to its foliage, it often produces small pink or white flowers, adding a delicate contrast to its bold leaves. It prefers bright, indirect light, moderate watering, and can go through periods of dormancy, especially in summer, where leaves may die back before regrowing.
It’s compact, pet-safe, and easy to grow indoors with minimal fuss — just give it light, water, and a little patience during dormancy.
Quick Info
- Light: Bright
- Water: Medium
- Size: 6–12 inches tall and wide
- Humidity: Moderate
- Temp: 60–75°F (16–24°C)
- Flowering: Yes
- Type: Bulb
- Dog Safe: Yes
- Cat Safe: Yes
- Kid Safe: Yes
Toxicity Info
- Dog Safe: Yes
- Cat Safe: Yes
- Kid Safe: Yes
Care Instructions
- Place in bright, indirect light
- Use well-draining potting soil
- Water when top inch of soil is dry
- Expect leaf die-back during dormancy — stop watering and resume when new growth appears
- Trim faded blooms or dying leaves to encourage new growth
Common Problems
- Drooping or collapsed leaves: Natural movement or entering dormancy
- Leaf fade: Needs more light
- No new growth: May be dormant — wait and resume watering once regrowth appears
FAQs
It’s a natural reaction called nyctinasty — the plant responds to light and darkness.
No — Oxalis triangularis is considered non-toxic in small quantities but can cause mild stomach upset if a lot is eaten.
The leaves may die back completely. Let the soil dry out, and wait for regrowth — usually in a few weeks.
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