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Oxalis triangularis subsp. papilionacea (Purple Shamrock)

Purple Shamrock, False Shamrock, Oxalis regnellii, Oxalis regnellii 'Brazilian Butterfly', Oxalis regnellii triangularis, False Shamrock 'Atropurpurea'

AGM Award
Oxalis triangularis subsp. papilionacea, Purple Shamrock, False Shamrock, Oxalis regnellii, Oxalis regnellii 'Brazilian Butterfly', Pink flowers, Purple Foliage, Love Plant, Luck Plant
Oxalis triangularis subsp. papilionacea, Purple Shamrock, False Shamrock, Oxalis regnellii, Oxalis regnellii 'Brazilian Butterfly', Pink flowers, Purple Foliage, Love Plant, Luck Plant

Adding striking color to borders or pots, Oxalis triangularis subsp. papilionacea (Purple Shamrock) is a bulbous plant forming a lush foliage mound of deep burgundy, trifoliate leaves that close at night and open wide to the morning light. Each leaf has the shape of a little heart but is triangular like butterfly wings. In summer, umbels of delicate, five-petaled flowers, white to pale lavender-pink, appear atop slender stems, above the handsome clover-like foliage. This is a very easy foliage plant to cultivate and maintain. Incredibly long-lived, Purple Shamrock is not invasive and is a good choice for containers, borders, or indoors. Great as a ground cover in mild winter areas.

  • Recipient of the prestigious Award of Garden Merit of the Royal Horticultural Society
  • Grows up to 6-12 in. tall (15-30 cm) and 12-24 in wide (30-60 cm).
  • Easily grown in light (sandy), medium (loamy), well-drained soils in part shade . Water regularly during the active growing season, but allow the surface soil to dry out between waterings. Keep barely moist when dormant in the winter
  • Well-suited to borders, containers, woodland gardens
  • Deer and rabbit resistant.
  • Propagate by seed or division
  • False Shamrock is also considered an invasive plant in some parts of the world.
  • Toxic to dogs, toxic to cats, toxic to horses.
  • Native to Brazil

Requirements

Hardiness 6 - 11
Heat Zones 1 - 9
Climate Zones 7, 8, 9, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24
Plant Type Bulbs, Perennials
Plant Family Oxalidaceae
Genus Oxalis
Common names Purple Shamrock
Exposure Partial Sun
Season of Interest Summer (Early, Mid, Late)
Height 6" - 1' (15cm - 30cm)
Spread 1' - 2' (30cm - 60cm)
Maintenance Low
Water Needs Average
Soil Type Loam, Sand
Soil pH Alkaline, Neutral
Soil Drainage Moist but Well-Drained
Characteristics Plant of Merit, Showy
Tolerance Deer, Rabbit
Attracts Butterflies
Garden Uses Ground Covers, Patio And Containers
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Alternative Plants to Consider

Oxalis violacea (Violet Wood Sorrel)
Oxalis griffithii (Wood Sorrel)
Oxalis vulcanicola ‘Molten Lava’
Oxalis hirta (Tropical Woodsorrel)
Oxalis depressa (Wood Sorrel)
Oxalis oregana (Redwood Sorrel)

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Requirements

Hardiness 6 - 11
Heat Zones 1 - 9
Climate Zones 7, 8, 9, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24
Plant Type Bulbs, Perennials
Plant Family Oxalidaceae
Genus Oxalis
Common names Purple Shamrock
Exposure Partial Sun
Season of Interest Summer (Early, Mid, Late)
Height 6" - 1' (15cm - 30cm)
Spread 1' - 2' (30cm - 60cm)
Maintenance Low
Water Needs Average
Soil Type Loam, Sand
Soil pH Alkaline, Neutral
Soil Drainage Moist but Well-Drained
Characteristics Plant of Merit, Showy
Tolerance Deer, Rabbit
Attracts Butterflies
Garden Uses Ground Covers, Patio And Containers
How Many Plants
Do I Need?
Guides with
Oxalis (Shamrock)
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