Bells of Ireland vs Periwinkle Vinca Plant Comparison
Compare these two plants side by side — care needs, key differences, and which is right for your home.
Bells of Ireland
Moluccella laevis
Bells of Ireland is an annual flowering plant known for its tall spikes of vibrant green, bell-shaped calyces (modified leaves) that surround tiny, inconspicuous white flowers. It typically grows to a height of 2-3 feet. While it can be grown indoors, it's primarily an outdoor plant, often cultivated in gardens for its unique architectural form and long-lasting cut flowers. People grow it for its ornamental value, particularly in floral arrangements, where its bright green color adds a striking contrast.
Periwinkle Vinca
Vinca minor
Vinca minor, commonly known as Common Periwinkle, is a trailing, evergreen perennial vine often used as a ground cover. It features glossy, dark green, oval leaves and produces small, five-petaled, typically blue-violet flowers in spring. While it can be grown in containers, it's primarily an outdoor plant valued for its ability to quickly spread and suppress weeds. People grow it for its attractive foliage, pretty flowers, and erosion control capabilities. It is not naturally an indoor plant and will struggle to thrive indoors.
Quick Plant Comparison
| Feature | Bells of Ireland | Periwinkle Vinca |
|---|---|---|
| Light | Full sun to partial shade outdoors. Indoors, requires very bright, direct light for at least 6 hours daily. | Partial shade to full shade outdoors. Indoors, bright indirect light is required, but it will likely not thrive. |
| Watering | Outdoors: 2-3 times per week, depending on weather. Indoors: Every 5-7 days, depending on light and humidity. | Every 10-14 days, depending on environmental conditions and pot size. Check soil moisture regularly. |
| Humidity | 40-60% | 30-50% |
| Temperature | 15-24°C | 15-24°C |
| Care Level | Expert | Expert |
| Growth Rate | Fast | Fast |
| Max Height | Indoors: 0.6-1 meter (2-3 feet). Outdoors: 0.6-1 meter (2-3 feet) | 10-15 cm (indoors, may be slightly taller if leggy) |
| Pet Safety | ✅ Safe | ❌ Toxic To Pets |
| Soil | Well-draining potting mix or garden soil. A mix of potting soil, perlite, and vermiculite is suitable. | Well-draining, loamy soil. A mix of potting soil, perlite, and compost is suitable for containers. |
| Beginner Friendly | ❌ No | ❌ No |
| Weekly Maintenance | 30 minutes weekly | 15 minutes weekly (mostly for pruning and removing dead leaves). |
🔬 Botanical Information — Comparing These Plants
Bells of Ireland
| Scientific Name | Moluccella laevis |
|---|---|
| Family | Lamiaceae (Mint family) |
| Native To | Western Asia (Turkey, Syria, Caucasus) |
| Also Known As | Bells of Ireland, Molucca Balm, Shellflower |
| Leaves | The leaves are light green, oval to rounded in shape, and have slightly toothed edges. They are arranged oppositely along the stem and are generally inconspicuous compared to the prominent calyces. |
| Flowers | The actual flowers are small, white, and relatively insignificant, hidden within the larger green calyces. Flowering typically occurs in summer. |
Periwinkle Vinca
| Scientific Name | Vinca minor |
|---|---|
| Family | Apocynaceae |
| Native To | Central and Southern Europe |
| Also Known As | Common Periwinkle, Lesser Periwinkle, Dwarf Periwinkle, Myrtle |
| Leaves | Oppositely arranged, oval-shaped leaves that are glossy, dark green, and approximately 2-5 cm long. |
| Flowers | Rarely flowers indoors. Outdoors, it produces small, five-petaled flowers, typically blue-violet, in spring and sporadically throughout the summer. |
📏 Size & Growth — Plant Comparison
Bells of Ireland
Periwinkle Vinca
🌱 Propagation — Comparing Plant Growth
Bells of Ireland
Methods: Seed
Difficulty: Moderate
Tips: Sow seeds indoors 6-8 weeks before the last frost or directly outdoors after the last frost. Seeds require light to germinate, so press them gently into the soil surface. Keep the soil consistently moist.
Periwinkle Vinca
Methods: Stem cuttings, Division, Layering
Difficulty: Easy
Tips: Take stem cuttings in spring or summer. Root them in water or directly in moist soil. For division, separate rooted sections of the plant and replant them. Layering involves burying a section of stem while still attached to the parent plant until roots form.
✨ Benefits & Features — Comparing Plant Value
Bells of Ireland
The most striking feature is the bright green, bell-shaped calyces that surround the tiny white flowers. These calyces persist long after the flowers have faded, providing extended ornamental value. It is not native to Ireland, despite its common name.
- ✓ Adds unique architectural interest to gardens and floral arrangements.
- ✓ Provides a vibrant green color that contrasts well with other flowers.
- ✓ Attracts pollinators like bees and butterflies.
- ✓ Symbolizes luck and good fortune.
- ✓ Can be dried and used in dried flower arrangements.
- 🐾 Pet Safe
Periwinkle Vinca
Vinca minor is known for its ability to thrive in shady conditions and its rapid spreading habit. It forms a dense mat of foliage that effectively suppresses weeds. Its evergreen leaves provide year-round interest.
- ✓ Erosion control on slopes.
- ✓ Suppresses weed growth.
- ✓ Provides evergreen ground cover.
- ✓ Attracts pollinators with its flowers.
- ✓ Adds visual interest to shady areas.
- ⚠️ Toxic to pets
📅 Maintenance Schedule — Plant Care Comparison
Bells of Ireland
Periwinkle Vinca
🌞 Light Requirements
Bells of Ireland
Full sun to partial shade outdoors. Indoors, requires very bright, direct light for at least 6 hours daily.
Low light tolerant: ❌ No
Periwinkle Vinca
Partial shade to full shade outdoors. Indoors, bright indirect light is required, but it will likely not thrive.
Low light tolerant: ❌ No
💧 Watering Needs
Bells of Ireland
Outdoors: Water regularly, keeping the soil consistently moist but not waterlogged. Indoors: Water thoroughly when the top inch of soil feels dry. Overwatering can lead to root rot; underwatering will cause wilting and browning of the calyces.
Periwinkle Vinca
Water thoroughly when the top inch of soil feels dry. Avoid overwatering, which can lead to root rot. In containers, ensure good drainage. Signs of overwatering include yellowing leaves and soggy soil. Underwatering is indicated by wilting leaves.
🌡️ Temperature & Humidity
Bells of Ireland
Temperature: 15-24°C
Humidity: 40-60%
Periwinkle Vinca
Temperature: 15-24°C
Humidity: 30-50%
🤔 Which Plant Is Right For You?
Bells of Ireland
Moluccella laevisExperienced gardeners who want a unique and striking addition to their cut flower arrangements.
✅ Choose This Plant If...
- You want a unique and striking addition to your garden or floral arrangements.
- You enjoy the challenge of growing plants that require specific conditions.
- You are looking for a plant with a strong architectural presence.
- You want to attract pollinators to your garden.
- You need a long-lasting cut flower with a vibrant green color.
❌ Skip This Plant If...
- You have limited sunlight indoors and cannot provide supplemental lighting.
- You are a beginner gardener looking for an easy-to-grow plant.
- You live in a very hot or humid climate, which can increase the risk of fungal diseases.
Periwinkle Vinca
Vinca minorGardeners looking for a low-maintenance ground cover for shady areas outdoors.
✅ Choose This Plant If...
- You need a fast-spreading ground cover for a shady area outdoors.
- You want a low-maintenance plant for erosion control.
- You appreciate evergreen foliage and small, attractive flowers.
- You want to suppress weeds in your garden.
- You are looking for a plant that tolerates a wide range of soil conditions.
❌ Skip This Plant If...
- You have pets that might ingest the plant.
- You are looking for an easy indoor plant.
- You live in an area where Vinca minor is considered an invasive species.
🎯 Quick Verdict
⚡ Key Differences Between These Plants
Both plants have similar basic care requirements but differ in appearance and specific needs. Compare plants carefully to find the best fit for your space.
💡 Pro Tips For Comparing These Plants
Bells of Ireland Care Tips
Bells of Ireland are best suited for outdoor gardens. Growing them indoors is challenging due to their high light requirements. Supplemental lighting is almost always necessary. Consistent watering and well-draining soil are crucial to prevent root rot. Requires careful monitoring for pests and diseases.
- Start seeds indoors 6-8 weeks before the last frost for earlier blooms.
- Provide well-draining soil to prevent root rot.
- Water regularly, especially during hot and dry weather.
- Fertilize every 2-4 weeks during the growing season with a balanced liquid fertilizer.
- Pinch back young plants to encourage bushier growth.
Periwinkle Vinca Care Tips
Vinca minor is primarily an outdoor ground cover and is challenging to grow indoors. It requires bright indirect light, well-draining soil, and careful watering. It can be prone to pests and diseases indoors. Its aggressive spreading habit can also be difficult to manage in a container.
- Provide well-draining soil to prevent root rot.
- Water thoroughly when the top inch of soil is dry.
- Fertilize sparingly during the growing season.
- Prune regularly to control spread and maintain shape.
- Monitor for pests and diseases, and treat promptly.
⚠️ Common Problems & Solutions — Plant Care Comparison
Bells of Ireland
Periwinkle Vinca
❓ Frequently Asked Questions — Comparing These Plants
Bells of Ireland
What are the light requirements for Bells of Ireland?
Bells of Ireland crave sunlight. They need at least 6-8 hours of direct sunlight each day to produce vibrant green calyces and strong stems. Insufficient light can lead to leggy growth, pale coloring, and reduced blooming. When grown indoors, place them near a south-facing window where they can receive ample sunlight. If natural light is limited, supplement with grow lights. Rotate the plants regularly to ensure even light exposure on all sides. When starting seeds indoors, use grow lights to ensure healthy seedling development.
How do I care for Bells of Ireland?
Bells of Ireland require full sun, at least 6-8 hours daily, to thrive. Plant them in well-draining soil with a slightly acidic to neutral pH (6.0-7.0). Water regularly, keeping the soil consistently moist but not waterlogged, especially during hot weather. Fertilize every 2-3 weeks with a balanced liquid fertilizer during the growing season (spring and summer).
How do I propagate Bells of Ireland?
Bells of Ireland are typically propagated by seed.
Periwinkle Vinca
What are the light requirements for Periwinkle Vinca?
Periwinkle Vinca thrives in bright, indirect light. While it can tolerate some direct sunlight, especially in the morning, prolonged exposure to intense afternoon sun can scorch its leaves. An east-facing window is ideal, providing gentle morning sun and bright indirect light throughout the day. A west-facing window can work if you filter the afternoon sun with sheer curtains. Insufficient light can result in leggy growth and reduced flowering. If growing outdoors, choose a location that receives partial shade, especially during the hottest part of the day. Rotate your plant regularly to ensure even light exposure on all sides.
How do I care for Periwinkle Vinca?
Periwinkle Vinca thrives in well-draining soil and requires moderate watering, allowing the soil to dry slightly between waterings to prevent root rot. Fertilize regularly during the growing season with a balanced, liquid fertilizer to promote abundant blooms. Prune occasionally to maintain shape and remove spent flowers, encouraging new growth and continuous flowering. Periwinkle prefers bright, indirect light, but can tolerate some direct sunlight, especially in the morning. Provide adequate air circulation to prevent fungal diseases. Protect from frost in colder climates, as it is not frost-hardy. Deadheading spent blooms will encourage more flowers. Monitor regularly for pests like aphids or spider mites and treat promptly if detected.
How do I propagate Periwinkle Vinca?
Periwinkle Vinca can be easily propagated through stem cuttings. Take 4-6 inch cuttings from healthy stems, removing the lower leaves. Dip the cut end in rooting hormone and plant in a well-draining potting mix. Keep the soil consistently moist and provide bright, indirect light. Rooting typically occurs within a few weeks. Division is also possible, carefully separating established clumps at the roots. While not common, keikis (small plantlets) can occasionally form on stems, which can be carefully removed and potted. Ensure the cutting or division has adequate roots before transplanting to a larger pot.
Last updated: April 22, 2026 — Plant care data reviewed and verified by our editorial team.