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Everything You Need To Know About Oxalis Triangularis

Published on September 21st 2020
A vase filled with purple flowers

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Who doesn't recognise the purple leaves of the lovely Oxalis Triangularis! This popular plant is often referenced as False Shamrock or Purple Shamrock. Although this plant can live outdoors, it is also a striking houseplant.
A close up of a purple flower and triangular purple leaves of a Oxalis triangularis subsp. papilionacea plant

Purpleleaf False Shamrock

Oxalis triangularis ssp. papilionacea

Plant Care

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How To Care For Oxalis Triangularis?

Growing Purple Shamrock is a rewarding experience since the plant will put out generous growth every year if it is kept in rich, well-draining soil, and watered moderately when the top inch of the soil becomes dry.

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If you live in an area where temperatures remain mild throughout the year, you can grow Oxalis outside as ground cover.

How To Water Oxalis Triangularis

This plant is pretty forgiving when it comes to watering, however, it will not tolerate being waterlogged or being watered too frequently. During the growing season, check the top inch of the soil and if it's dry, water them. During the winter, water less frequently, about every two weeks.
The False Shamrock is also happy being in average humidity, so there is no need to make any extra efforts on that front.
A close up of a bunch of purple flowers

How To Fertilise Oxalis?

Oxalis is really not a fussy plant, so you don't need to worry about it much. Just fertilise with general houseplant feed every two to three weeks in the growing season to keep it happy.

Why Did My Oxalis Die?

Oxalis Triangularis (and other Oxalis as well!) enter a dormancy period after a strong growing season. You will see the leaves of Oxalis go brown and crispy, but fear not! This just gives the corms a chance to recharge and come back to life with more force than before.
If you have the plant outside, this might happen every year. However, if you keep it as a houseplant, your plant might go several growing seasons without a dormancy period. That could be years! So don’t be alarmed if your plant seems to die out of nowhere. Just stop watering your plant, cut back the crispy leaves, and move the plant to a dark, cool place for 2 to 4 weeks. The plant should jump back to life after it is given some sun again.
A close up of a flower

Why Is Oxalis Triangularis Called False Shamrock?

The plant gets its name from the triangle-shaped leaves. The word “shamrock” usually refers to either the species Trifolium dubium or Trifolium repens. However, due to the similarly looking leaves, Oxalis are often mistaken for Trifolium, gaining the title “False Shamrock”

Where Can I Buy Oxalis Triangularis?

You can buy Purple Shamrock on the Candide Marketplace today!

Just click this link to check out the latest listings by UK based independent plant sellers!

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