Calla Lily vs Purple Shamrock Plant Comparison
Compare these two plants side by side — care needs, key differences, and which is right for your home.
Calla Lily
Zantedeschia aethiopica
Calla Lilies are rhizomatous herbaceous perennials known for their elegant, trumpet-shaped spathes (often mistaken for petals) that surround a central spadix. While often grown outdoors in gardens, they can be cultivated indoors with proper care. They typically reach a height of 1-3 feet. The plant features large, arrow-shaped, glossy green leaves. People grow them for their striking flowers, which come in various colors, including white, yellow, pink, and purple. They are popular as cut flowers and ornamental plants.
Purple Shamrock
Oxalis triangularis
Oxalis triangularis, commonly known as Purple Shamrock, is a rhizomatous perennial plant admired for its striking, deep purple, triangular leaves that resemble shamrocks. The leaves fold up at night and reopen during the day in response to light. It produces small, delicate white or pale pink flowers. While it can be grown indoors, it thrives best with bright, indirect light and consistent moisture. People grow it for its unique foliage color and dynamic leaf movements, adding a touch of whimsy to indoor and outdoor spaces.
Quick Plant Comparison
| Feature | Calla Lily | Purple Shamrock |
|---|---|---|
| Light | Bright, indirect light. Avoid direct sunlight, which can scorch the leaves. | Bright, indirect light to partial shade. Requires at least 4-6 hours of bright, indirect light daily. |
| Watering | Every 5-7 days during the growing season, less frequently during dormancy. | Every 7-10 days, depending on light and temperature |
| Humidity | 40-60% | 40-60% |
| Temperature | 18-24°C | 18-24°C |
| Care Level | Moderate | Easy |
| Growth Rate | Moderate | Moderate |
| Max Height | 0.3-0.9 meters | 20-30 cm |
| Pet Safety | ❌ Toxic To Pets | ❌ Toxic To Pets |
| Soil | Well-draining potting mix rich in organic matter. A mix of peat moss, perlite, and vermiculite is suitable. | Well-draining potting mix (e.g., a mix of peat moss, perlite, and vermiculite) |
| Beginner Friendly | With Caution | ✅ Yes |
| Weekly Maintenance | 10 minutes weekly | 5 minutes weekly |
🔬 Botanical Information — Comparing These Plants
Calla Lily
| Scientific Name | Zantedeschia aethiopica |
|---|---|
| Family | Araceae |
| Native To | South Africa |
| Also Known As | Calla Lily, Arum Lily |
| Leaves | Large, arrow-shaped or heart-shaped, glossy green leaves. They are typically 15-45 cm long and 10-25 cm wide. The leaves are smooth and have a slightly waxy texture. |
| Flowers | Can flower indoors with sufficient light and proper care. The 'flower' is a spathe, a modified leaf, that surrounds a central spadix. Spathes come in various colors, including white, yellow, pink, and purple. |
Purple Shamrock
| Scientific Name | Oxalis triangularis |
|---|---|
| Family | Oxalidaceae |
| Native To | Brazil |
| Also Known As | Purple Shamrock, False Shamrock, Love Plant |
| Leaves | The leaves are triangular in shape, resembling shamrocks, and are a deep purple color. They are composed of three leaflets, each with a smooth texture. The leaves are approximately 2-4 cm wide. |
| Flowers | It can flower indoors, producing small, delicate white or pale pink flowers on slender stems. The flowers are not particularly showy but add a subtle charm to the plant. |
📏 Size & Growth — Plant Comparison
Calla Lily
Purple Shamrock
🌱 Propagation — Comparing Plant Growth
Calla Lily
Methods: Division, Seed
Difficulty: Moderate
Tips: Divide rhizomes in early spring before the growing season begins. Ensure each division has at least one eye (bud). Plant the divisions in well-draining soil. Seeds can be sown in spring, but germination can be slow and inconsistent.
Purple Shamrock
Methods: Division, Rhizome cuttings
Difficulty: Easy
Tips: Divide rhizomes during repotting. Ensure each division has at least one growth point. Plant in well-draining soil and keep moist until new growth appears.
✨ Benefits & Features — Comparing Plant Value
Calla Lily
The Calla Lily's 'flower' is actually a modified leaf called a spathe, making it visually striking and unique. It comes in a variety of colors, adding versatility to its aesthetic appeal. Its elegant form makes it a popular choice for bouquets and floral arrangements.
- ✓ Adds a touch of elegance to any room
- ✓ Provides beautiful cut flowers
- ✓ Relatively easy to propagate
- ✓ Can improve indoor air quality by removing some toxins (though not a significant air purifier)
- ✓ Offers a calming and aesthetically pleasing presence
- ⚠️ Toxic to pets
Purple Shamrock
The most unique characteristic is the nyctinastic movement of the leaves, folding up at night or in low light. The deep purple color of the foliage also makes it stand out from other houseplants.
- ✓ Adds a pop of color to any space.
- ✓ Easy to propagate and share with friends.
- ✓ Provides a unique visual interest with its moving leaves.
- ✓ Relatively low-maintenance and easy to care for.
- ✓ Can be grown indoors or outdoors in suitable climates.
- ⚠️ Toxic to pets
📅 Maintenance Schedule — Plant Care Comparison
Calla Lily
Purple Shamrock
🌞 Light Requirements
Calla Lily
Bright, indirect light. Avoid direct sunlight, which can scorch the leaves.
Low light tolerant: ❌ No
Purple Shamrock
Bright, indirect light to partial shade. Requires at least 4-6 hours of bright, indirect light daily.
Low light tolerant: ❌ No
💧 Watering Needs
Calla Lily
Keep the soil consistently moist during the growing season (spring and summer), but not waterlogged. Allow the top inch of soil to dry out slightly between waterings. Reduce watering in the fall and winter when the plant is dormant. Overwatering can lead to root rot, indicated by yellowing leaves and a musty smell. Underwatering results in drooping leaves and dry soil.
Purple Shamrock
Water thoroughly when the top inch of soil feels dry to the touch. Ensure good drainage to prevent root rot. Overwatering can lead to bulb rot, indicated by yellowing leaves and a mushy base. Underwatering results in drooping leaves and stunted growth.
🌡️ Temperature & Humidity
Calla Lily
Temperature: 18-24°C
Humidity: 40-60%
Purple Shamrock
Temperature: 18-24°C
Humidity: 40-60%
🤔 Which Plant Is Right For You?
Calla Lily
Zantedeschia aethiopicaSomeone who appreciates elegant flowers and is willing to provide the necessary light and humidity.
✅ Choose This Plant If...
- You love elegant, trumpet-shaped flowers.
- You can provide bright, indirect light.
- You are willing to monitor soil moisture carefully.
- You appreciate plants with attractive foliage even when not in bloom.
- You want a plant that can be used as a cut flower.
❌ Skip This Plant If...
- You have pets that might ingest the plant.
- You struggle with overwatering plants.
- You cannot provide bright, indirect light.
- You prefer low-maintenance plants.
Purple Shamrock
Oxalis triangularisSomeone who wants a visually striking, low-maintenance houseplant with unique foliage.
✅ Choose This Plant If...
- You want a plant with unique, moving foliage.
- You appreciate low-maintenance plants.
- You enjoy the color purple.
- You want a plant that can be easily propagated.
- You have a bright, indirect light location.
❌ Skip This Plant If...
- You have pets that might ingest the plant.
- You tend to overwater plants.
- You don't have a bright location.
🎯 Quick Verdict
⚡ Key Differences Between These Plants
Calla Lily is rated Moderate care level, while Purple Shamrock is Easy.
💡 Pro Tips For Comparing These Plants
Calla Lily Care Tips
Calla Lilies require bright, indirect light and consistently moist soil during the growing season. They need a period of dormancy in the fall and winter with reduced watering. While they can be grown indoors, providing adequate light and humidity can be challenging. Regular fertilization during the growing season is essential for healthy growth and flowering.
- Provide a well-draining potting mix to prevent root rot.
- Allow the top inch of soil to dry out slightly between waterings.
- Fertilize regularly during the growing season with a balanced liquid fertilizer.
- Provide bright, indirect light to encourage flowering.
- Allow the plant to enter dormancy in the fall and winter by reducing watering.
Purple Shamrock Care Tips
Purple Shamrock is relatively easy to care for, requiring bright, indirect light and well-draining soil. It can go dormant, losing its leaves, but will regrow from the rhizomes. Avoid overwatering and provide occasional fertilization during the growing season.
- Provide bright, indirect light to maintain the purple color of the leaves.
- Allow the soil to dry slightly between waterings to prevent root rot.
- Fertilize regularly during the growing season to encourage healthy growth.
- Don't be alarmed if the plant goes dormant; it will regrow from the rhizomes.
- Rotate the plant regularly to ensure even growth.
⚠️ Common Problems & Solutions — Plant Care Comparison
Calla Lily
Purple Shamrock
❓ Frequently Asked Questions — Comparing These Plants
Calla Lily
What are the light requirements for Calla Lily?
Calla Lilies need bright, indirect light to thrive. Insufficient light can result in fewer blooms and leggy growth. An east-facing window is ideal, providing gentle morning light. If placed in a south or west-facing window, filter the light with a sheer curtain to prevent scorching. Rotate the plant regularly to ensure even light exposure on all sides. Avoid placing Calla Lilies in dark corners or areas with minimal light, as this will negatively impact their growth and flowering. During winter months, when light is limited, consider supplementing with a grow light to ensure adequate light levels.
How do I care for Calla Lily?
Calla Lilies thrive in bright, indirect light; avoid direct sunlight to prevent leaf scorch. Water thoroughly when the top inch of soil feels dry, ensuring good drainage to prevent root rot. Maintain humidity by misting the plant regularly or using a humidifier. Fertilize monthly during the growing season (spring and summer) with a balanced liquid fertilizer diluted to half strength to encourage blooming. Reduce watering and stop fertilizing in the fall and winter as the plant enters dormancy. Repot every one to two years in spring, using a well-draining potting mix. Prune away any yellowing or dead leaves to maintain the plant’s health and appearance. Provide a temperature between 60-75°F (15-24°C) for optimal growth.
How do I propagate Calla Lily?
Calla Lilies can be propagated through division, stem cuttings, and keiki (small plantlets). For division, carefully separate rhizomes when repotting, ensuring each section has roots and at least one eye. Plant each division in its own pot with well-draining soil. For stem cuttings, take a cutting from a healthy stem and place it in water until roots develop, then plant in soil. Keiki can be removed when they have developed roots and planted separately. Maintain humidity and provide bright, indirect light for successful propagation. Ensure proper drainage to prevent rot.
Purple Shamrock
What are the light requirements for Purple Shamrock?
Purple Shamrock thrives in bright, indirect light. Direct sunlight can scorch the leaves, causing them to fade or burn. An east-facing window is ideal, providing gentle morning sun. A north-facing window can work if supplemented with grow lights. Insufficient light will cause the leaves to become pale green and the plant to become leggy as it reaches for more light. Rotate the plant regularly to ensure even light exposure on all sides. During the winter months, when light levels are lower, consider supplementing with a grow light to maintain the plant’s vibrant purple color.
How do I care for Purple Shamrock?
Purple Shamrock is relatively easy to care for. Provide bright, indirect light for optimal growth and vibrant color. Water when the top inch of soil feels dry, allowing the soil to drain well to prevent root rot. During the growing season (spring and summer), fertilize every two to four weeks with a balanced liquid fertilizer diluted to half strength. Reduce watering and stop fertilizing during the dormant period (fall and winter). Maintain moderate humidity. Repot every one to two years, or when the plant becomes root-bound, using a well-draining potting mix. Prune any dead or yellowing leaves to encourage new growth. Watch out for pests like spider mites and aphids, and treat promptly if detected.
How do I propagate Purple Shamrock?
Purple Shamrock can be easily propagated through division. During repotting, carefully separate the bulbs (corms) at the roots. Each section should have its own roots and leaves. Plant each section in its own pot with well-draining potting mix. Water thoroughly and place in bright, indirect light. Stem cuttings are not a viable method. Keikis do not form on this plant. Propagation through division is best done during the dormant period or early spring before new growth begins. Ensure each division has a healthy root system to increase the chances of success. New growth should appear within a few weeks.
Last updated: May 6, 2026 — Plant care data reviewed and verified by our editorial team.