Oxalis regnellii 'Triangularis' Purple Shamrock



Oxalis Triangularis has beautifully unique purple, trifoliate leaves that closely resemble shamrocks and grow in groups of threes atop slender, burgundy stems. Also known as ‘False Shamrock’, Oxalis Triangularis has dark purple foliage that supports five petaled pink flowers that bloom on naked green stems from spring to mid-summer.

Triangularis performs best in full sun to partial shade and is adaptable to varied soil conditions, making it perfect for containers and gardens alike. Its hardy nature makes it deer and rabbit resistant while still attracting a wide variety of pollinators. Oxalis Triangularis distinctive color and bulbous shape is sure to stand out in any landscape, container, or home garden. Tender so best treated as an annual.


  • Common Names: False Shamrock
  • Zones: 7b-10
  • Light Requirements: Part Shade to Shade
  • Soil Preference: moist, well-draining soil
  • Height at Maturity: 8-12
  • Width at Maturity: 15
  • Bloom Color: Pink
  • Bloom Time: Early summer to mid fall.

Special Features

  • Attracts: Butterflies.
  • Tolerates:
  • Other Features:

Care and Growing Tips

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Shipping Info

 Spring 2023 shipping schedule:

Zones 9, 10: Starting Mon. March 20th
Zone 8: Starting Mon. March 27th
Zone 7: Starting Mon. April 3rd
Zone 6: Starting Mon. April 17th
Zone 5: Starting Mon. May 1st
Zones 2, 3, 4: Starting Mon. May 8th

If you'd like to receive your plants now, you can request it in the 'shipping requests' box on the order or email us. (Please note that we will not ship dormant plants, and we do not offer any sort of guarantee for plants overwintering.)

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We ship via UPS & USPS (the Post Office), and their ship rates are automatically generated through our site. We do not profit on shipping costs. We are working with these providers to get our customers the best rates possible.

All ship times are subject to change if extreme weather conditions are present here at the nursery or at the shipping destination.

Please note: Depending on the time of year, the foliage of the plants may be trimmed to fit into our shipping boxes. This could delay the flowering of the plant, but many perennials actually benefit from being cut back.

We are currently not able to ship to Puerto Rico, Hawaii, and outside of the US.