How to Grow Purple Shamrock
Purple Shamrock
Oxalis triangularis 'Burgundy'
flowerPurple Shamrock is a stunning foliage plant with deep burgundy, triangular leaves that fold up at night in a sleep-like movement. It produces delicate pink or lavender flowers that bloom intermittently throughout the year. This tender perennial is grown as a houseplant in most climates and brings dramatic color to indoor spaces.
When should you plant Purple Shamrock in your zone?
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Example Purple Shamrock timeline · Pittsburgh, PA (Zone 6b)
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Plant Purple Shamrock
Around Apr 17Near Pittsburgh's average last spring frost.
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Tend & protect
Late spring–summerWatering, feeding, and pest-watch reminders.
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First Purple Shamrock blooms
Around May 17≈ 30 days after planting
Sample dates for Pittsburgh, PA. Sign up to get exact Purple Shamrock dates for your own zip code.
Growing Conditions
Soil
Growing Zones
Find your zone →Thrives year-round outdoors in zones 10-11; grown as a houseplant elsewhere
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Get my Purple Shamrock timeline →Growth Stages
Emergence
2-3 weeksSmall triangular leaves unfurl from bulbs or growing points; plant is compact and low-growing
Keep soil warm (65-75°F) and consistently moist; provide bright light to encourage leaf color development
Foliage Development
4-8 weeksDense burgundy triangular leaves expand and multiply; plant grows 6-12 inches tall; nightly leaf closure becomes pronounced
Maintain bright indirect light; ensure good air circulation to prevent fungal issues; fertilize every 2-3 weeks with diluted liquid fertilizer
Flowering
Ongoing, 2-3 months peak bloom periodsSmall pink, lavender, or white flowers emerge on thin stems above foliage; blooms appear intermittently year-round
Continue regular watering and light feeding; flowers are short-lived but continuously produced; remove faded blooms for neatness
Dormancy/Rest
2-3 months (winter in temperate climates)Plant may lose some vigor during winter or if stressed; growth slows; foliage may be less vibrant
Reduce watering frequency but don't allow soil to dry completely; lower fertilizer applications; maintain temperatures above 50°F
Rejuvenation
Spring transition, 4-6 weeksPlant regains vigor as light increases and temperatures warm; new growth accelerates; bulbs may split and multiply
Resume regular watering and feeding; repot every 12-18 months if needed; divide and propagate overcrowded bulbs
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
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Increase humidity, mist leaves regularly, isolate infected plants; spray with neem oil or insecticidal soap every 7-10 days
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Remove with rubbing alcohol on cotton swab; spray with insecticidal soap; improve air circulation
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Scrape off manually; apply horticultural oil or neem oil; treat every 7-14 days until resolved
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Use yellow sticky traps; spray with insecticidal soap or neem oil; isolate from other plants
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Allow soil surface to dry between waterings; use sand layer on soil surface; apply Bti (Bacillus thuringiensis israelensis)
Uses
Indoor Container Plant & Décor
HouseholdPurple Shamrock is prized as a houseplant for its striking burgundy foliage that complements modern and eclectic interiors. The dramatic leaf color and unique nightly folding habit make it a conversation piece in homes and offices. [source]
Pollinator-Friendly Ornamental
WildlifeThe delicate pink flowers attract small bees and insects in outdoor settings (zones 10-11). Indoor blooms provide visual interest even if pollination doesn't occur. [source]
Terrarium & Vivarium Plant
CraftPurple Shamrock thrives in humid terrarium conditions and adds striking foliage color to closed or semi-closed containers. Its compact growth and moderate size make it ideal for tabletop terrariums. [source]
Traditional Medicinal Uses
MedicinalOxalis species have been used in traditional herbal medicine in parts of South America and Asia for digestive and nutritional purposes. The plant contains oxalic acid and may have mild diuretic properties. [source]
Edible Ornamental (Limited Use)
CulinaryWhile Oxalis triangularis is primarily ornamental, the leaves and flowers are technically edible with a mild tart flavor due to oxalic acid content. They can garnish salads in small quantities but should not be consumed in large amounts. [source]
This is not medical advice. LizPlants is not a medical resource. Always consult a qualified healthcare professional before using plants medicinally.
Harvest Tips
This is an ornamental plant, not typically harvested for consumption. Pinch back stems periodically to encourage bushier growth. Divide bulbs in spring every 12-18 months for propagation. Cut flowers can be enjoyed indoors briefly, though they are delicate.
Fun Facts
- 🌱 Purple Shamrock exhibits nyctinasty—a circadian rhythm where leaves fold upward at night and reopen in the morning, a behavior also seen in sleep movements of other plants like Mimosa pudica.
- 🌱 The plant is native to Brazil and is unrelated to true shamrocks (clovers); the triangular leaf shape inspired its common name despite taxonomic differences.
- 🌱 Oxalis triangularis can produce thousands of tiny self-seeding bulblets (bulbils) that spread readily in moist soil, making it easy to propagate but potentially invasive in outdoor tropical settings.
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