Maltese Cross vs Mandevilla Plant Comparison
Compare these two plants side by side — care needs, key differences, and which is right for your home.
Maltese Cross
Lychnis chalcedonica
Lychnis chalcedonica, commonly known as Maltese Cross, is a herbaceous perennial prized for its vibrant, scarlet-red, cross-shaped flower clusters. It typically grows to a height of 60-90 cm (2-3 feet). The plant features upright stems with lance-shaped, slightly hairy leaves. It is primarily an outdoor plant, thriving in sunny gardens and borders. People grow it for its eye-catching flowers that attract pollinators like butterflies and hummingbirds, adding a splash of color to summer gardens. It is not ideally suited for indoor cultivation due to its high light requirements and need for a dormancy period.
Mandevilla
Mandevilla splendens
Mandevilla splendens is a vigorous, twining vine known for its showy, trumpet-shaped flowers. It is native to Brazil and is commonly cultivated as an ornamental plant in tropical and subtropical regions. The plant features glossy, dark green leaves and produces clusters of vibrant pink or red flowers. While often grown outdoors on trellises or arbors, it can be grown indoors with sufficient light and humidity. People grow it for its beautiful flowers and ability to add a tropical flair to gardens and patios. It is primarily an outdoor plant.
Quick Plant Comparison
| Feature | Maltese Cross | Mandevilla |
|---|---|---|
| Light | Full sun (at least 6 hours of direct sunlight per day) | Full sun to partial shade. Requires at least 6 hours of direct sunlight daily for optimal flowering. |
| Watering | Every 5-7 days during the growing season, less frequently in cooler months. | Every 3-7 days, depending on environmental conditions and pot size. |
| Humidity | 30-50% | 50-70% |
| Temperature | 15-25°C | 18-27°C |
| Care Level | Expert | Expert |
| Growth Rate | Moderate | Fast |
| Max Height | N/A - Outdoor plant, typically 60-90 cm (2-3 feet) | Indoors: 1-2 meters (if supported); Outdoors: Up to 5 meters |
| Pet Safety | ❌ Toxic To Pets | ❌ Toxic To Pets |
| Soil | Well-draining soil, such as a mix of garden soil, sand, and compost. | Well-draining potting mix, such as a mix of peat moss, perlite, and vermiculite. |
| Beginner Friendly | ❌ No | ❌ No |
| Weekly Maintenance | 10 minutes weekly (deadheading, watering) | 30 minutes weekly |
🔬 Botanical Information — Comparing These Plants
Maltese Cross
| Scientific Name | Lychnis chalcedonica |
|---|---|
| Family | Caryophyllaceae |
| Native To | Russia, Central Asia, and parts of Europe |
| Also Known As | Maltese Cross, Jerusalem Cross, Scarlet Lightning |
| Leaves | Lance-shaped, slightly hairy leaves that are typically 5-10 cm long. They are arranged oppositely along the stems and are a medium green color. |
| Flowers | The flowers are bright scarlet-red and arranged in dense, rounded clusters at the top of the stems. Each flower is about 2-3 cm in diameter and has four petals forming a distinct cross shape. Flowering occurs in summer. |
Mandevilla
| Scientific Name | Mandevilla splendens |
|---|---|
| Family | Apocynaceae |
| Native To | Brazil |
| Also Known As | Mandevilla, Rocktrumpet, Dipladenia |
| Leaves | The leaves of Mandevilla splendens are glossy, dark green, and oval-shaped with pointed tips. They are typically 10-20 cm long and 5-10 cm wide, with a smooth texture and prominent veins. |
| Flowers | Mandevilla splendens produces large, trumpet-shaped flowers that are typically pink or red, although white and yellow varieties are also available. The flowers are fragrant and bloom profusely during the growing season (spring and summer). Flowering indoors is rare unless optimal light conditions are met. |
📏 Size & Growth — Plant Comparison
Maltese Cross
Mandevilla
🌱 Propagation — Comparing Plant Growth
Maltese Cross
Methods: Seed, Division, Stem cuttings
Difficulty: Easy
Tips: For seeds, sow indoors 6-8 weeks before the last frost or directly outdoors in spring. Division is best done in spring or fall. Stem cuttings can be taken in late spring or early summer.
Mandevilla
Methods: Stem cuttings
Difficulty: Moderate
Tips: Take stem cuttings in spring or summer. Dip the cut end in rooting hormone and plant in a well-draining potting mix. Keep the soil moist and provide warmth and humidity.
✨ Benefits & Features — Comparing Plant Value
Maltese Cross
The Maltese Cross is distinguished by its unique flower shape, with four petals arranged in a cross-like formation. Its vibrant scarlet-red color makes it a standout in any garden. It is a reliable perennial that returns year after year.
- ✓ Attracts pollinators to the garden
- ✓ Adds vibrant color to the landscape
- ✓ Relatively low-maintenance once established
- ✓ Provides a long blooming period
- ✓ Can be used in cut flower arrangements
- ⚠️ Toxic to pets
Mandevilla
Mandevilla splendens is distinguished by its large, trumpet-shaped flowers and glossy, dark green leaves. Its vigorous climbing habit makes it a popular choice for adding vertical interest to gardens and patios. Unlike some vines, it is not considered invasive.
- ✓ Adds vibrant color to outdoor spaces.
- ✓ Attracts pollinators like hummingbirds and butterflies.
- ✓ Provides a tropical aesthetic.
- ✓ Can be trained to climb trellises or arbors, adding vertical interest.
- ✓ Offers a sense of accomplishment for experienced gardeners.
- ⚠️ Toxic to pets
📅 Maintenance Schedule — Plant Care Comparison
Maltese Cross
Mandevilla
🌞 Light Requirements
Maltese Cross
Full sun (at least 6 hours of direct sunlight per day)
Low light tolerant: ❌ No
Mandevilla
Full sun to partial shade. Requires at least 6 hours of direct sunlight daily for optimal flowering.
Low light tolerant: ❌ No
💧 Watering Needs
Maltese Cross
Water thoroughly when the top inch of soil feels dry. Avoid overwatering, which can lead to root rot. Ensure good drainage. Signs of underwatering include wilting leaves, while overwatering can cause yellowing and mushy stems.
Mandevilla
Water thoroughly when the top inch of soil is dry. Avoid overwatering, which can lead to root rot. Signs of overwatering include yellowing leaves and a soggy soil. Underwatering is indicated by wilting leaves and dry soil.
🌡️ Temperature & Humidity
Maltese Cross
Temperature: 15-25°C
Humidity: 30-50%
Mandevilla
Temperature: 18-27°C
Humidity: 50-70%
🤔 Which Plant Is Right For You?
Maltese Cross
Lychnis chalcedonicaGardeners looking to add vibrant color and attract pollinators to their sunny flower beds.
✅ Choose This Plant If...
- You want a plant that attracts butterflies and hummingbirds to your garden.
- You desire a vibrant, scarlet-red flower display in summer.
- You have a sunny garden or border where the plant can thrive.
- You are looking for a relatively low-maintenance perennial.
- You enjoy plants with historical significance and interesting names.
❌ Skip This Plant If...
- You have pets that might ingest the plant, as it is toxic.
- You lack a sunny outdoor space to provide adequate light.
- You are looking for an indoor plant.
- You live in a very hot, humid climate where powdery mildew is prevalent.
- You prefer plants that require minimal watering.
Mandevilla
Mandevilla splendensExperienced gardeners who can provide the specific light and humidity conditions required for healthy growth and flowering.
✅ Choose This Plant If...
- You want a plant with vibrant, trumpet-shaped flowers that bloom throughout the growing season.
- You have a sunny outdoor space, such as a patio or balcony, where the plant can thrive.
- You are experienced with plant care and can provide the specific light and humidity requirements.
- You want to attract hummingbirds and butterflies to your garden.
- You are looking for a climbing vine to add vertical interest to your landscape.
❌ Skip This Plant If...
- You have pets that may ingest the plant, as it is toxic to them.
- You lack a bright, sunny location to provide the necessary light for flowering.
- You are a beginner gardener and prefer low-maintenance plants.
🎯 Quick Verdict
⚡ Key Differences Between These Plants
Maltese Cross has moderate growth, while Mandevilla grows fast.
💡 Pro Tips For Comparing These Plants
Maltese Cross Care Tips
Maltese Cross is primarily an outdoor plant requiring full sun and well-drained soil. Indoor cultivation is challenging due to its high light needs and dormancy requirements. It needs a cold period in winter to thrive. It is toxic to pets.
- Ensure well-draining soil to prevent root rot.
- Deadhead spent flowers regularly to encourage more blooms.
- Provide full sun for optimal flowering.
- Apply a balanced fertilizer in spring and early summer.
- Mulch around the plant in winter to protect the roots.
Mandevilla Care Tips
Mandevilla splendens is primarily an outdoor plant that requires bright light, consistent moisture, and regular fertilization. Indoor cultivation is challenging due to the need for high light levels and humidity. It is also toxic to pets, requiring careful placement.
- Provide a trellis or support structure for the vine to climb.
- Water deeply but infrequently, allowing the soil to dry slightly between waterings.
- Fertilize regularly during the growing season to promote abundant flowering.
- Protect the plant from frost and freezing temperatures.
- Prune regularly to maintain shape and encourage bushier growth.
⚠️ Common Problems & Solutions — Plant Care Comparison
Maltese Cross
Mandevilla
❓ Frequently Asked Questions — Comparing These Plants
Maltese Cross
What are the light requirements for Maltese Cross?
Maltese Cross plants thrive in full sun, requiring at least six hours of direct sunlight per day to produce abundant blooms. Insufficient sunlight can result in leggy growth and fewer flowers. When growing indoors, place your Maltese Cross near a south-facing window where it can receive maximum sunlight. If natural sunlight is limited, consider using grow lights to supplement their needs. Rotate the plant regularly to ensure even exposure to light on all sides. Monitor the plant for signs of etiolation (stretching towards the light), which indicates insufficient light. Adjust the plant’s position or supplement with artificial light as needed.
How do I care for Maltese Cross?
Maltese Cross plants are relatively easy to care for, thriving in well-drained soil and full sun. Water regularly, especially during dry periods, but avoid overwatering, which can lead to root rot. Apply a balanced fertilizer in the spring to promote healthy growth and abundant blooms. Deadhead spent flowers to encourage continuous blooming throughout the season. These plants are generally hardy and can tolerate a range of temperatures, but may benefit from some protection in colder climates. Regularly check for pests and diseases, and address any issues promptly. Prune back the plant after flowering to maintain its shape and promote bushier growth. Ensure good air circulation around the plant to prevent fungal diseases.
How do I propagate Maltese Cross?
Maltese Cross can be propagated through division, stem cuttings, or seeds.
Mandevilla
What are the light requirements for Mandevilla?
Mandevilla thrives in bright, indirect sunlight. It needs at least 6 hours of sunlight daily to produce abundant blooms. An east-facing window is ideal, providing gentle morning sun. A south-facing window can work, but be sure to filter the light with a sheer curtain to prevent leaf scorch. If grown outdoors, choose a location that receives full sun for at least part of the day, but is sheltered from the harshest afternoon rays. Insufficient light will result in fewer blooms and leggy growth. If natural light is lacking, supplement with a grow light. Rotate the plant regularly to ensure even light exposure on all sides. Watch for signs of insufficient light, such as pale leaves and lack of flowering, and adjust the plant’s location accordingly.
How do I care for Mandevilla?
To keep your Mandevilla thriving, provide it with bright, indirect sunlight for at least 6 hours a day. Water thoroughly when the top inch of soil feels dry, ensuring good drainage to prevent root rot. Fertilize every 2-4 weeks during the growing season (spring and summer) with a balanced fertilizer, or one specifically formulated for flowering plants, to encourage abundant blooms. Prune regularly to maintain shape and promote bushier growth. Provide a trellis or support structure for climbing varieties. Maintain humidity levels around 50-60% by misting regularly or using a humidifier. Repot in spring every 1-2 years as needed, using a well-draining potting mix. Protect from frost and temperatures below 50°F (10°C). Monitor for pests like spider mites and aphids, and treat promptly. Deadhead spent flowers to encourage continuous blooming.
How do I propagate Mandevilla?
Mandevilla can be propagated using stem cuttings. Take a 4-6 inch stem cutting from a healthy plant in spring or summer. Remove the lower leaves and dip the cut end in rooting hormone. Plant the cutting in a well-draining potting mix and keep it moist. Cover with a plastic bag to increase humidity. Place in a warm, bright location, but out of direct sunlight. Roots should develop in 4-6 weeks. Once rooted, transplant into a larger pot. Mandevilla is not commonly propagated by division or keiki. Stem cuttings are the most reliable method for home propagation. Consistent moisture and warmth are crucial for successful rooting.
Last updated: April 21, 2026 — Plant care data reviewed and verified by our editorial team.