Oxalis triangularis Sunny
Best low-maintenance perennial for adding dramatic color to containers and borders.
Oxalis triangularis 'Sunny', also known as Purple Shamrock or False Shamrock, is a striking perennial celebrated for its deep purple, triangular leaves that fold down at night and delicate light pink flowers. This ornamental plant adds elegance to indoor and outdoor spaces, making it a favorite among gardeners. Its dynamic foliage and charming blooms offer year-round interest. The plant forms a low-growing, bushy mound, reaching 4–6 inches in height, perfect for borders, containers, or ground cover. It is loved by pollinators and excellent for cutting, bringing beauty and life to any setting.
Owner Satisfaction
4.6
/ 5
Category Rank
864
/ 3268
#864 in Landscaping & Garden Plants
Flowering Height
610
/ - inches
Who it's for
- Designers seeking bold, high-contrast foliage for indoor or outdoor displays
- Nature lovers who enjoy interactive, responsive botanical features
- Busy gardeners wanting low-maintenance plants that thrive with minimal fuss
Who should skip it
- Gardeners managing delicate ecosystems where aggressive spreaders are unwanted
- New plant owners who might panic during natural seasonal rest cycles
- Pet owners or parents concerned about accidental ingestion of toxic plants
Performance breakdown
Visual Impact
Deep purple foliage provides a dramatic contrast in any garden bed.
Growth Habit
Compact, bushy mound structure is ideal for tidy container arrangements.
Dynamic Interest
Nyctinastic leaf movement adds a captivating, living element to your space.
Pollinator Appeal
Delicate blooms serve as a reliable magnet for local garden pollinators.
Pest Resistance
Natural deer resistance keeps your landscape looking pristine without extra effort.
Versatility
Seamlessly transitions between indoor pots and outdoor border ground cover.
Key Specs
Flowering Height
6 - 10 inches
Density
3-4 inches
Planting Depth
1-2 inches
Origin
Holland
Plant Type
Bulbs
Hardiness Zones
7 - 9
Features
- Striking dark purple, triangular foliage
- Delicate light pink flowers bloom from late spring to early fall
- Foliage exhibits nyctinasty (folds down at night)
- Forms a low-growing, bushy mound
- Ideal for borders, containers, and ground cover
- Deer resistant
- Loved by pollinators
- Excellent for cutting
What customers say
Customers consistently praise the vibrant aesthetic appeal and robust quality of the Oxalis triangularis Sunny by DutchGrown. Many express delight at how easily these bulbs sprout and thrive, quickly transforming spaces with their cheerful yellow blooms and distinctive foliage. The plant's striking appearance and straightforward care requirements emerge as key highlights, making it a favored choice for adding a touch of sunny charm to any home or garden. Its reliable growth and visual impact contribute significantly to high satisfaction.
Know before you buy
While it is named 'Sunny,' this plant performs best in bright, indirect light. In warmer climates, it appreciates some afternoon shade to prevent the delicate foliage from scorching.
Oxalis triangularis is hardy in zones 7 through 9. If you live in a region with colder winters, you should treat it as a container plant and bring it indoors before the first frost.
Nyctinasty is a natural movement where the leaves fold down at night and open back up in the morning. It is a fascinating, rhythmic behavior that makes the plant feel very dynamic in your garden or home.
You should plant the bulbs approximately 1 to 2 inches deep. Ensure the soil is well-draining to prevent the bulbs from rotting, especially when grown in containers.
Yes, the Oxalis triangularis is generally avoided by deer due to its taste and texture. It is a reliable choice if you are gardening in an area with high wildlife traffic.
The foliage typically forms a low-growing mound of 4 to 6 inches, while the delicate flower stalks can reach a total height of 6 to 10 inches.
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