Hardy Plumbago vs Princess Flower Plant Comparison
Compare these two plants side by side — care needs, key differences, and which is right for your home.
Hardy Plumbago
Plumbago auriculata
Plumbago auriculata, commonly known as Cape Plumbago, is a sprawling, semi-woody shrub prized for its clusters of phlox-like, sky-blue flowers. It's primarily an outdoor plant, thriving in warm climates. It can grow to a considerable size if left unchecked. People grow it for its vibrant flower color, drought tolerance, and ability to attract butterflies. While it can be grown in containers, it requires significant pruning and may not flower as profusely indoors. It is not naturally an indoor plant.
Princess Flower
Tibouchina urvilleana
Tibouchina urvilleana, commonly known as Princess Flower, is a fast-growing evergreen shrub or small tree prized for its vibrant purple flowers. Native to Brazil, it typically grows outdoors in warm climates. It features velvety, dark green leaves and produces profuse blooms throughout the warmer months. While it can be grown in containers, it requires significant sunlight and humidity to thrive, making it challenging to maintain indoors long-term. People grow it for its showy flowers and tropical appearance.
Quick Plant Comparison
| Feature | Hardy Plumbago | Princess Flower |
|---|---|---|
| Light | Full sun to partial shade. Requires at least 6 hours of direct sunlight for optimal flowering. | 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 winter. | Every 3-7 days, depending on environmental conditions and pot size. |
| Humidity | 40-60% | 50-70% |
| Temperature | 18-27°C | 18-27°C |
| Care Level | Expert | Expert |
| Growth Rate | Fast | Fast |
| Max Height | 1-2 meters (indoors, with significant pruning) | 1-2 meters (indoors, rarely reaches outdoor size) |
| Pet Safety | ❌ Toxic To Pets | ❌ Toxic To Pets |
| Soil | Well-draining soil mix, such as a mix of potting soil, perlite, and sand. | Well-draining, slightly acidic soil mix. A mix of potting soil, peat moss, and perlite is suitable. |
| Beginner Friendly | ❌ No | ❌ No |
| Weekly Maintenance | 30 minutes weekly (including watering, pruning, and fertilizing) | 30 minutes weekly |
🔬 Botanical Information — Comparing These Plants
Hardy Plumbago
| Scientific Name | Plumbago auriculata |
|---|---|
| Family | Plumbaginaceae |
| Native To | South Africa |
| Also Known As | Cape Plumbago, Blue Plumbago, Leadwort |
| Leaves | The leaves are oval to oblong, about 2-5 cm long, and a light green color. They are arranged alternately along the stems and have a slightly sticky texture. |
| Flowers | It rarely flowers indoors. Outdoors, it produces clusters of phlox-like, sky-blue flowers. The flowers are about 2 cm in diameter and have five petals. They bloom profusely during the warm months. |
Princess Flower
| Scientific Name | Tibouchina urvilleana |
|---|---|
| Family | Melastomataceae |
| Native To | Brazil |
| Also Known As | Princess Flower, Glory Bush, Lasiandra |
| Leaves | Oppositely arranged, ovate to lance-shaped leaves with a velvety texture. The leaves are typically dark green and can grow up to 15 cm long. |
| Flowers | Produces profuse, showy purple flowers with prominent stamens. Flowers are typically 7-10 cm in diameter. Flowering is less likely indoors due to insufficient light. |
📏 Size & Growth — Plant Comparison
Hardy Plumbago
Princess Flower
🌱 Propagation — Comparing Plant Growth
Hardy Plumbago
Methods: Stem cuttings, Seed
Difficulty: Easy
Tips: Take stem cuttings in spring or summer. Dip the cut end in rooting hormone and plant in moist potting mix. Keep the soil consistently moist until roots develop.
Princess Flower
Methods: Stem cuttings, Seed
Difficulty: Moderate
Tips: Take stem cuttings in spring or summer. Dip the cut end in rooting hormone and plant in moist potting mix. Keep the cuttings in a warm, humid environment until roots develop.
✨ Benefits & Features — Comparing Plant Value
Hardy Plumbago
The vibrant blue color of the flowers is relatively rare in the plant world, making it a standout addition to any garden. It's also known for its ability to attract butterflies, adding to its ecological value.
- ✓ Attracts pollinators, enhancing garden biodiversity.
- ✓ Provides vibrant color to the landscape.
- ✓ Drought-tolerant, reducing water consumption.
- ✓ Relatively low-maintenance once established (outdoors).
- ✓ Can be used as a hedge or screen.
- ⚠️ Toxic to pets
Princess Flower
The velvety texture of the leaves and the vibrant purple color of the flowers make this plant stand out. It's also a fast grower, quickly filling in garden spaces.
- ✓ Provides vibrant color to gardens and patios.
- ✓ Attracts pollinators like bees and butterflies.
- ✓ Can be pruned into a desired shape.
- ✓ Offers a tropical aesthetic.
- ✓ Can be grown in containers on patios or balconies.
- ⚠️ Toxic to pets
📅 Maintenance Schedule — Plant Care Comparison
Hardy Plumbago
Princess Flower
🌞 Light Requirements
Hardy Plumbago
Full sun to partial shade. Requires at least 6 hours of direct sunlight for optimal flowering.
Low light tolerant: ❌ No
Princess Flower
Full sun to partial shade. Requires at least 6 hours of direct sunlight daily for optimal flowering.
Low light tolerant: ❌ No
💧 Watering Needs
Hardy Plumbago
Water thoroughly when the top inch of soil feels dry. Avoid overwatering, which can lead to root rot. During the growing season, water more frequently. Reduce watering in the winter. Signs of underwatering include wilting leaves and dry soil. Overwatering signs include yellowing leaves and soggy soil.
Princess Flower
Water thoroughly when the top inch of soil feels dry. Avoid overwatering, which can lead to root rot. Allow excess water to drain away. Signs of underwatering include wilting leaves; signs of overwatering include yellowing leaves and soggy soil.
🌡️ Temperature & Humidity
Hardy Plumbago
Temperature: 18-27°C
Humidity: 40-60%
Princess Flower
Temperature: 18-27°C
Humidity: 50-70%
🤔 Which Plant Is Right For You?
Hardy Plumbago
Plumbago auriculataGardeners in warm climates looking for a drought-tolerant, flowering shrub to attract butterflies.
✅ Choose This Plant If...
- You live in a warm climate with plenty of sunshine.
- You want to attract butterflies to your garden.
- You need a drought-tolerant plant.
- You appreciate vibrant blue flowers.
- You have a large outdoor space for it to grow.
❌ Skip This Plant If...
- You have pets that may ingest the plant.
- You lack a sunny outdoor space.
- You are looking for an easy indoor plant.
- You dislike frequent pruning.
- You live in a cold climate with frequent frosts.
Princess Flower
Tibouchina urvilleanaExperienced gardeners in warm climates who want a showy flowering shrub for their garden.
✅ Choose This Plant If...
- You live in a warm climate with plenty of sunshine.
- You want a plant with vibrant purple flowers.
- You have experience caring for demanding plants.
- You have a greenhouse or sunroom to provide adequate light and humidity.
- You are willing to provide regular pruning and fertilization.
❌ Skip This Plant If...
- You live in a cold climate with limited sunlight.
- You are a beginner gardener.
- You have pets that may ingest the plant.
- You don't have time for regular pruning and fertilization.
- You don't have a bright, sunny location.
🎯 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
Hardy Plumbago Care Tips
Plumbago auriculata is primarily an outdoor plant that requires full sun and well-draining soil. Growing it indoors is challenging due to its high light requirements and potential for becoming leggy. Regular pruning is essential to maintain a manageable size and encourage flowering. It is toxic to pets.
- Provide ample sunlight for optimal flowering.
- Water deeply but infrequently, allowing the soil to dry out slightly between waterings.
- Prune regularly to maintain shape and encourage bushier growth.
- Fertilize during the growing season to promote abundant blooms.
- Protect from frost in colder climates.
Princess Flower Care Tips
Princess Flower is primarily an outdoor plant that requires full sun and high humidity. Indoor cultivation is challenging due to the difficulty of providing adequate light and humidity. It needs regular watering and fertilization. Expect reduced flowering and potential pest issues indoors.
- Provide at least 6 hours of direct sunlight daily.
- Water thoroughly when the top inch of soil is dry.
- Fertilize regularly during the growing season.
- Prune after flowering to maintain shape.
- Monitor for pests and diseases regularly.
⚠️ Common Problems & Solutions — Plant Care Comparison
Hardy Plumbago
Princess Flower
❓ Frequently Asked Questions — Comparing These Plants
Hardy Plumbago
What are the light requirements for Hardy Plumbago?
Hardy Plumbago thrives in full sun to partial shade. Ideally, it should receive at least six hours of direct sunlight per day for optimal flowering. In hotter climates, providing some afternoon shade can prevent scorching of the leaves. When grown indoors, place it near a sunny window where it can receive ample light. Insufficient light can lead to reduced flowering and leggy growth. Rotate the plant regularly to ensure even light exposure on all sides. Monitor the plant for signs of light stress, such as pale leaves or elongated stems. Adjust its location accordingly to provide the appropriate amount of light.
How do I care for Hardy Plumbago?
Hardy Plumbago thrives in well-drained soil and requires regular watering, especially during dry periods. Plant in a location that receives full sun to partial shade; more sun promotes more blooms. Fertilize in the spring with a balanced fertilizer to encourage healthy growth and flowering. Prune in late winter or early spring to remove dead or damaged growth and to maintain the desired shape. Hardy Plumbago is relatively pest and disease-resistant but monitor for common garden pests. Mulch around the base of the plant to help retain moisture and suppress weeds. Deadhead spent flowers to encourage continued blooming. Protect from frost in colder climates, as it is only hardy to USDA zones 5-9. Regularly check soil moisture and adjust watering as needed. Proper drainage is essential to prevent root rot. Provide support if needed, as the plant can sometimes sprawl.
How do I propagate Hardy Plumbago?
Hardy Plumbago can be propagated by division, stem cuttings, or root cuttings. For division, carefully dig up the plant in early spring or fall and separate the root ball into smaller clumps. Replant the clumps in well-drained soil. For stem cuttings, take 4-6 inch cuttings from new growth in late spring or early summer. Remove the lower leaves and dip the cut end in rooting hormone. Plant the cuttings in a well-draining potting mix and keep them moist until they root. For root cuttings, take 2-3 inch sections of root in late winter. Place horizontally in a tray of compost and cover lightly. Keep moist until new growth appears. These will need warmth to be successful.
Princess Flower
What are the light requirements for Princess Flower?
Princess Flower thrives in bright, indirect sunlight. Ideally, it needs at least 6 hours of sunlight per day to produce abundant blooms. A location near an east- or west-facing window is often suitable indoors. Avoid direct afternoon sun, which can scorch the leaves. If grown outdoors, provide partial shade during the hottest part of the day. Insufficient light can result in fewer blooms and leggy growth. Rotate the plant regularly to ensure even light exposure on all sides. During the winter months, when sunlight is less intense, consider supplementing with artificial grow lights.
How do I care for Princess Flower?
Princess Flower requires well-draining, acidic soil with a pH of 5.5 to 6.5. Water thoroughly when the top inch of soil feels dry, allowing excess water to drain. Fertilize every 2-4 weeks during the growing season (spring to fall) with a balanced fertilizer formulated for flowering plants. Prune regularly to maintain shape and encourage bushier growth and more blooms. Provide bright, indirect sunlight for at least 6 hours a day. Maintain a moderate humidity level, especially indoors. Protect from frost and freezing temperatures. Repot every 1-2 years as needed, using a slightly larger pot. Monitor for pests like aphids and spider mites, and treat promptly if detected. Ensure good air circulation to prevent fungal diseases.
How do I propagate Princess Flower?
Princess Flower can be propagated using stem cuttings. Take 4-6 inch cuttings from new growth in spring or summer. Remove the lower leaves and dip the cut end in rooting hormone. Plant the cuttings in a well-draining potting mix. Keep the soil moist and provide bright, indirect light. Rooting typically occurs within 4-8 weeks. Division can be done when repotting mature plants, carefully separating the root ball. Keikis are not common on Princess Flower.
Last updated: May 11, 2026 — Plant care data reviewed and verified by our editorial team.