Photo by Melody

PlantFiles: Purple Shamrock
Oxalis triangularis 'Francis'

Family: Oxalidaceae
Genus: Oxalis (oks-AL-iss) (Info)
Species: triangularis (try-an-gew-LAIR-iss) (Info)
Cultivar: Francis

Synonym:Oxalis regnellii

2 vendors have this plant for sale.

56 members have or want this plant for trade.

Alpines and Rock Gardens

6-12 in. (15-30 cm)

12-15 in. (30-38 cm)

USDA Zone 8a: to -12.2 C (10 F)
USDA Zone 8b: to -9.4 C (15 F)
USDA Zone 9a: to -6.6 C (20 F)
USDA Zone 9b: to -3.8 C (25 F)
USDA Zone 10a: to -1.1 C (30 F)
USDA Zone 10b: to 1.7 C (35 F)
USDA Zone 11: above 4.5 C (40 F)

Sun Exposure:
Full Sun
Sun to Partial Shade
Light Shade


Bloom Color:

Bloom Time:
Blooms repeatedly

Grown for foliage

Other details:
This plant is suitable for growing indoors
Average Water Needs; Water regularly; do not overwater

Soil pH requirements:
6.1 to 6.5 (mildly acidic)
6.6 to 7.5 (neutral)

Patent Information:

Propagation Methods:
By dividing rhizomes, tubers, corms or bulbs (including offsets)

Seed Collecting:
N/A: plant does not set seed, flowers are sterile, or plants will not come true from seed

Click thumbnail
to view:

By Todd_Boland
Thumbnail #1 of Oxalis triangularis by Todd_Boland

By lindseyp
Thumbnail #2 of Oxalis triangularis by lindseyp


1 positive
3 neutrals
No negatives

Gardeners' Notes:

Positive tvksi On Jul 19, 2010, tvksi from Paris, TX (Zone 7b) wrote:

Recieved from great gand daughter several years back for St Patties Day, and it has been with me ever since, along with its many offsprings. I love it. It adds color to the shade garden as well as sunny areas and pots. When the sun shines through it, it really shows out the red/purple for a nice surprise. The little pink blooms are a bonus. It makes a nice ground cover for bare spots. I know some folks have had trouble with some Oxalis taking over, but these have not been too agressive. I'd like them to be a little more aggressive as many friends and family want some. : )

Neutral MotherNature4 On May 25, 2010, MotherNature4 from Bartow, FL (Zone 9a) wrote:

Very pretty color to leaves, but have trouble with Red Spider Mites when the weather gets dry.

Neutral atm1 On Jun 6, 2009, atm1 from Detroit, MI wrote:

When I first grew this as a houseplant 2 years ago, I thought they were impossible houseplants. Later I learned that they are a type of bulb, and was just dying back naturally as they do! Better as a houseplant here in Michigan; don't always come back in the Spring if left outside in a garden over winter like larger bulbs.

Neutral stapeliad On Feb 7, 2008, stapeliad from Lodi, CA (Zone 9b) wrote:

Difficult to remove from my backyard. Easily propagated from tubers. An attractive plant.


This plant has been said to grow in the following regions:

Hanceville, Alabama
Bismarck, Arkansas
Searcy, Arkansas
Lemon Grove, California
Lodi, California
Long Beach, California
Madera, California
Bartow, Florida
Bokeelia, Florida
Dunedin, Florida
Jupiter, Florida
Kissimmee, Florida
Palm Bay, Florida
Ponce De Leon, Florida
Saint Cloud, Florida
Saint Petersburg, Florida
Sarasota, Florida
Wellborn, Florida
Mount Sterling, Kentucky
Elizabeth City, North Carolina
Altus, Oklahoma
Oklahoma City, Oklahoma
Portland, Oregon
Knoxville, Tennessee
Nashville, Tennessee
Colleyville, Texas
Fort Worth, Texas
Houston, Texas
Justin, Texas
Lufkin, Texas
Manvel, Texas
Paris, Texas
Port Arthur, Texas
Tyler, Texas

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