Pompom Tree vs Purple Fountain Grass Plant Comparison
Compare these two plants side by side — care needs, key differences, and which is right for your home.
Pompom Tree
Dombeya wallichii
Dombeya wallichii, commonly known as the Pompom Tree, is a fast-growing, evergreen tree or large shrub native to Madagascar. It is highly prized for its spectacular display of large, spherical clusters of pink to rose-red flowers that resemble pompoms, hence the name. Typically grown outdoors in tropical and subtropical climates, it can reach heights of 15-25 feet. While it can be grown in containers, it requires significant space and is challenging to maintain indoors long-term due to its size and light requirements. It is grown for its ornamental value and showy blooms.
Purple Fountain Grass
Pennisetum setaceum 'Rubrum'
Purple Fountain Grass is a striking ornamental grass prized for its arching, burgundy-purple foliage and bottlebrush-like flower plumes. It typically grows in a mounded form, reaching several feet in height and width. While technically a perennial in warmer climates, it is often grown as an annual in cooler regions due to its sensitivity to frost. It is primarily an outdoor plant, grown for its dramatic texture and color in gardens and landscapes. People grow it for its ornamental value, adding movement and visual interest to borders, containers, and mass plantings.
Quick Plant Comparison
| Feature | Pompom Tree | Purple Fountain Grass |
|---|---|---|
| Light | Full sun to partial shade. Requires at least 6 hours of direct sunlight daily for optimal flowering. | Full sun (at least 6 hours of direct sunlight per day) |
| Watering | 2-3 times per week during the growing season, less frequently in winter | Every 7-10 days, depending on weather and soil drainage |
| Humidity | 40-60% | 20-50% |
| Temperature | 18-27°C | 18-30°C |
| Care Level | Expert | Expert |
| Growth Rate | Fast | Moderate |
| Max Height | 2-3 meters (indoors, in a very large container) | Outdoor: 0.6-1.5 meters. Indoor (unlikely to thrive): 0.3-0.6 meters |
| Pet Safety | ❌ Toxic To Pets | ✅ Safe |
| Soil | Well-draining, fertile soil. A mix of potting soil, perlite, and compost is suitable. | Well-draining soil, such as a sandy loam or a potting mix amended with perlite |
| Beginner Friendly | ❌ No | ❌ No |
| Weekly Maintenance | 30 minutes weekly | 15 minutes weekly |
🔬 Botanical Information — Comparing These Plants
Pompom Tree
| Scientific Name | Dombeya wallichii |
|---|---|
| Family | Malvaceae |
| Native To | Madagascar |
| Also Known As | Pompom Tree, Pinkball Tree |
| Leaves | The leaves are large, heart-shaped, and slightly fuzzy. They are typically dark green and have prominent veins. The leaves provide a lush backdrop to the showy flowers. |
| Flowers | The Pompom Tree produces large, spherical clusters of pink to rose-red flowers that resemble pompoms. Flowering is rare indoors unless optimal conditions are met. |
Purple Fountain Grass
| Scientific Name | Pennisetum setaceum 'Rubrum' |
|---|---|
| Family | Poaceae |
| Native To | Hybrid cultivar; species native to Africa, Southwest Asia |
| Also Known As | Purple Fountain Grass, Red Fountain Grass |
| Leaves | The leaves are long, narrow, and arching, with a deep burgundy-purple color. They have a fine texture and create a graceful, flowing appearance. |
| Flowers | It produces bottlebrush-like flower plumes that are initially a deep burgundy-purple, fading to a tan color as they mature. Flowering typically occurs in summer and fall. It is unlikely to flower indoors. |
📏 Size & Growth — Plant Comparison
Pompom Tree
Purple Fountain Grass
🌱 Propagation — Comparing Plant Growth
Pompom Tree
Methods: Stem cuttings, Seed
Difficulty: Moderate
Tips: Take stem cuttings in spring or summer. Use rooting hormone and keep the cuttings in a humid environment. Seeds can be sown in spring after soaking them in water for 24 hours.
Purple Fountain Grass
Methods: Seed, Division
Difficulty: Moderate
Tips: Divide clumps in spring or early summer. Sow seeds indoors 6-8 weeks before the last frost.
✨ Benefits & Features — Comparing Plant Value
Pompom Tree
The Pompom Tree is distinguished by its large, spherical clusters of pink to rose-red flowers that resemble pompoms. These blooms create a spectacular display, making it a highly sought-after ornamental tree. It is also a fast grower in warm climates.
- ✓ Provides stunning visual appeal with its pompom-like flowers.
- ✓ Attracts pollinators like butterflies and hummingbirds to your garden.
- ✓ Offers a tropical aesthetic to outdoor spaces.
- ✓ Can provide shade in warm climates.
- ✓ Offers a rewarding challenge for experienced gardeners.
- ⚠️ Toxic to pets
Purple Fountain Grass
Its deep purple foliage and graceful, arching habit make it a standout in any garden. The bottlebrush-like flower plumes add further visual interest and movement.
- ✓ Adds visual interest and texture to the garden
- ✓ Attracts birds
- ✓ Drought tolerant
- ✓ Deer resistant
- ✓ Provides movement in the landscape
- 🐾 Pet Safe
📅 Maintenance Schedule — Plant Care Comparison
Pompom Tree
Purple Fountain Grass
🌞 Light Requirements
Pompom Tree
Full sun to partial shade. Requires at least 6 hours of direct sunlight daily for optimal flowering.
Low light tolerant: ❌ No
Purple Fountain Grass
Full sun (at least 6 hours of direct sunlight per day)
Low light tolerant: ❌ No
💧 Watering Needs
Pompom Tree
Water deeply when the top inch of soil feels dry. Avoid overwatering, which can lead to root rot. During the growing season (spring and summer), water more frequently. Reduce watering in the fall and winter. Signs of overwatering include yellowing leaves and soggy soil. Underwatering is indicated by wilting leaves and dry soil.
Purple Fountain Grass
Water deeply when the top inch of soil feels dry to the touch. Avoid overwatering, which can lead to root rot. Signs of underwatering include drooping or browning leaves. Signs of overwatering include yellowing leaves and soggy soil.
🌡️ Temperature & Humidity
Pompom Tree
Temperature: 18-27°C
Humidity: 40-60%
Purple Fountain Grass
Temperature: 18-30°C
Humidity: 20-50%
🤔 Which Plant Is Right For You?
Pompom Tree
Dombeya wallichiiExperienced gardeners in warm climates who have ample outdoor space and are looking for a showy flowering tree.
✅ Choose This Plant If...
- You live in a warm climate and have ample outdoor space.
- You want a spectacular flowering tree that attracts pollinators.
- You are an experienced gardener looking for a challenging plant.
- You are willing to provide the necessary sunlight and care to maintain its health.
- You appreciate unique and showy blooms.
❌ Skip This Plant If...
- You have limited indoor space.
- You cannot provide at least 6 hours of direct sunlight daily.
- You have pets that might ingest the plant.
- You are a beginner gardener.
Purple Fountain Grass
Pennisetum setaceum 'Rubrum'Gardeners looking for a dramatic ornamental grass to add color and texture to their landscape.
✅ Choose This Plant If...
- You want a striking focal point in your garden.
- You need a drought-tolerant plant for a sunny location.
- You desire a plant with beautiful purple foliage and plumes.
- You want to attract birds to your garden.
- You need a deer-resistant plant.
❌ Skip This Plant If...
- You live in a cold climate and don't want to treat it as an annual.
- You don't have a sunny location.
- You are looking for a low-maintenance indoor plant.
🎯 Quick Verdict
⚡ Key Differences Between These Plants
Pompom Tree has fast growth, while Purple Fountain Grass grows moderate.
💡 Pro Tips For Comparing These Plants
Pompom Tree Care Tips
The Pompom Tree is primarily an outdoor plant and requires expert care to maintain indoors. It needs ample sunlight, proper watering, and regular fertilization. Due to its size and light requirements, it is challenging to grow indoors long-term. Regular pruning is necessary to control its size.
- Provide at least 6 hours of direct sunlight daily.
- Water deeply when the top inch of soil feels dry, but avoid overwatering.
- Fertilize regularly during the growing season with a balanced fertilizer.
- Prune after flowering to maintain shape and remove dead or damaged branches.
- Protect from frost in colder climates by bringing container plants indoors or providing insulation.
Purple Fountain Grass Care Tips
Purple Fountain Grass is primarily an outdoor plant and will struggle indoors due to its high light requirements. It needs full sun and well-draining soil. While it can be grown in containers, it requires regular watering and fertilization. Overwintering indoors is possible in colder climates, but the plant may not thrive.
- Plant in well-draining soil in a sunny location.
- Water deeply but infrequently, allowing the soil to dry out between waterings.
- Fertilize in spring with a balanced slow-release fertilizer.
- Cut back foliage in late fall or early spring.
- Protect from frost in colder climates.
⚠️ Common Problems & Solutions — Plant Care Comparison
Pompom Tree
Purple Fountain Grass
❓ Frequently Asked Questions — Comparing These Plants
Pompom Tree
What are the light requirements for Pompom Tree?
Pompom Trees thrive in bright, indirect light. Direct sunlight can scorch their leaves, so avoid placing them directly in front of south-facing windows. An east- or west-facing window is ideal, or a north-facing window if supplemented with grow lights. If the leaves start to fade or become pale, it may indicate that the plant is not receiving enough light.
How do I care for Pompom Tree?
The Pompom Tree requires bright, indirect light; avoid direct sunlight to prevent leaf scorch. Water when the top inch of soil feels dry, ensuring good drainage. Use a well-draining potting mix. Maintain moderate humidity levels, especially during dry winter months, by misting or using a humidifier. Fertilize sparingly during the growing season (spring and summer) with a balanced liquid fertilizer diluted to half strength.
How do I propagate Pompom Tree?
Pompom Trees can be propagated through stem cuttings or air layering. For stem cuttings, take a 4-6 inch cutting from a healthy stem. 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 until roots develop.
Purple Fountain Grass
What are the light requirements for Purple Fountain Grass?
Purple Fountain Grass requires at least 6-8 hours of direct sunlight per day to thrive and develop its characteristic vibrant purple foliage and abundant flower plumes. Insufficient sunlight can lead to leggy growth, faded color, and reduced flowering. When planting, choose a location that receives full sun throughout the day. If growing in containers, rotate the plant regularly to ensure even sun exposure on all sides. In hotter climates, some afternoon shade may be beneficial to prevent scorching, but avoid placing it in deep shade, which will hinder its growth. Supplemental lighting may be necessary if grown indoors during winter months.
How do I care for Purple Fountain Grass?
Purple Fountain Grass thrives in full sun and well-draining soil. Water thoroughly when the top inch of soil feels dry, but avoid overwatering, which can lead to root rot. Fertilize monthly during the growing season (spring and summer) with a balanced fertilizer to promote healthy growth and vibrant blooms. Prune away dead or damaged foliage in late winter or early spring before new growth emerges. In colder climates, treat it as an annual or bring it indoors during the winter. Provide adequate air circulation to prevent fungal diseases. Regularly inspect for pests like aphids or spider mites, and treat accordingly. Avoid planting in overly compacted or poorly draining soil. Mulching around the base can help retain moisture and suppress weeds. Protect from strong winds.
How do I propagate Purple Fountain Grass?
Purple Fountain Grass can be propagated by division. In early spring, carefully dig up the plant and divide the root ball into smaller clumps, ensuring each clump has healthy roots and foliage. Replant the divisions in well-draining soil and water thoroughly. Keep the soil consistently moist until the new plants are established. Division is the most reliable method. Seed propagation is possible but can be inconsistent in producing plants true to the ‘Rubrum’ cultivar. Stem cuttings are not typically used for propagating this grass. Keikis are not applicable as this plant doesn’t produce them. Ensure good air circulation to prevent fungal diseases after dividing.
Last updated: May 20, 2026 — Plant care data reviewed and verified by our editorial team.