Mangosteen vs Purple Fountain Grass Plant Comparison
Compare these two plants side by side — care needs, key differences, and which is right for your home.
Mangosteen
Garcinia mangostana
Mangosteen is a tropical evergreen tree known for its delicious fruit. It typically grows to a height of 6-25 meters. The tree has a straight trunk and a dense, rounded crown. The fruit is a deep reddish-purple when ripe, with a thick rind enclosing segments of white, juicy flesh. Mangosteen is primarily an outdoor plant, requiring specific tropical conditions to thrive. It is cultivated for its fruit, which is highly prized for its sweet and tangy flavor.
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 | Mangosteen | Purple Fountain Grass |
|---|---|---|
| Light | Full sun to partial shade. Requires very bright light for fruit production. | Full sun (at least 6 hours of direct sunlight per day) |
| Watering | Every 2-3 days during the growing season (adjust based on soil moisture). Less frequent in cooler months. | Every 7-10 days, depending on weather and soil drainage |
| Humidity | 70-90% | 20-50% |
| Temperature | 25-30°C | 18-30°C |
| Care Level | Expert | Expert |
| Growth Rate | Slow | Moderate |
| Max Height | Rarely fruits or reaches full size indoors. Expect a stunted, non-fruiting tree if grown indoors, reaching perhaps 1-2 meters. | Outdoor: 0.6-1.5 meters. Indoor (unlikely to thrive): 0.3-0.6 meters |
| Pet Safety | ❌ Toxic To Pets | ✅ Safe |
| Soil | Well-draining, slightly acidic soil rich in organic matter. A mix of loam, sand, 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 | 20 minutes weekly (monitoring, watering, pest control). | 15 minutes weekly |
🔬 Botanical Information — Comparing These Plants
Mangosteen
| Scientific Name | Garcinia mangostana |
|---|---|
| Family | Clusiaceae |
| Native To | Southeast Asia, specifically Malaysia, Thailand, Indonesia, and the Philippines |
| Also Known As | Mangosteen, Mangostan |
| Leaves | The leaves are opposite, oval to oblong, and leathery. They are dark green and glossy, measuring 10-25 cm long and 5-10 cm wide. |
| Flowers | Rarely flowers indoors. When it does flower outdoors, the flowers are small, fleshy, and greenish-white with reddish spots. |
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
Mangosteen
Purple Fountain Grass
🌱 Propagation — Comparing Plant Growth
Mangosteen
Methods: Seed
Difficulty: Difficult
Tips: Seeds must be fresh and sown immediately after removal from the fruit. Germination is slow and requires consistently warm and humid conditions. Seedlings are very sensitive and require careful handling.
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
Mangosteen
Mangosteen is known as the 'Queen of Fruits' and is highly prized for its delicious flavor. It is a slow-growing tree that requires specific tropical conditions to thrive, making it a challenging plant to grow outside of its native environment.
- ✓ Attractive foliage.
- ✓ Potential for fruit production (under ideal conditions).
- ✓ Unique and exotic plant.
- ✓ Can be a conversation starter.
- ✓ May improve indoor humidity levels (slightly).
- ⚠️ 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
Mangosteen
Purple Fountain Grass
🌞 Light Requirements
Mangosteen
Full sun to partial shade. Requires very bright light for fruit production.
Low light tolerant: ❌ No
Purple Fountain Grass
Full sun (at least 6 hours of direct sunlight per day)
Low light tolerant: ❌ No
💧 Watering Needs
Mangosteen
Water deeply when the topsoil feels dry. Avoid overwatering, as it can lead to root rot. Ensure good drainage. Signs of overwatering include yellowing leaves and a musty smell from the soil. Underwatering is indicated by wilting leaves and dry, cracked 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
Mangosteen
Temperature: 25-30°C
Humidity: 70-90%
Purple Fountain Grass
Temperature: 18-30°C
Humidity: 20-50%
🤔 Which Plant Is Right For You?
Mangosteen
Garcinia mangostanaExperienced tropical plant enthusiasts with access to greenhouse-like conditions.
✅ Choose This Plant If...
- You have a greenhouse or sunroom with controlled tropical conditions.
- You are an experienced tropical fruit grower.
- You are willing to invest in specialized equipment to maintain high humidity and temperature.
- You are primarily interested in the foliage and not necessarily the fruit.
- You live in a tropical climate and can grow it outdoors.
❌ Skip This Plant If...
- You live in a temperate climate with cold winters.
- You have limited space and cannot provide the necessary growing conditions.
- You are a beginner gardener.
- You are primarily interested in harvesting fruit.
- You have pets that might ingest the plant.
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
Mangosteen has slow growth, while Purple Fountain Grass grows moderate.
💡 Pro Tips For Comparing These Plants
Mangosteen Care Tips
Mangosteen is extremely challenging to grow indoors due to its high light, humidity, and temperature requirements. It rarely fruits outside of its native tropical environment. Maintaining the necessary conditions indoors is difficult, making it unsuitable for most indoor growers.
- Maintain high humidity levels using a humidifier or pebble tray.
- Provide bright, indirect light, supplementing with grow lights if necessary.
- Use well-draining soil to prevent root rot.
- Monitor for pests regularly and treat promptly.
- Avoid sudden temperature fluctuations.
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
Mangosteen
Purple Fountain Grass
❓ Frequently Asked Questions — Comparing These Plants
Mangosteen
What are the light requirements for Mangosteen?
Mangosteen requires bright, indirect light to flourish indoors. Direct sunlight can scorch its delicate leaves, so avoid placing it near south-facing windows without sheer curtains. East- or west-facing windows are ideal, providing ample light without the intensity of direct sun. If natural light is insufficient, supplement with grow lights to ensure adequate illumination. Insufficient light can lead to stunted growth and pale leaves. Rotate the plant regularly to ensure even light exposure on all sides. Consider light intensity when choosing a location; too little light can be as detrimental as too much.
How do I care for Mangosteen?
Mangosteen requires meticulous care to thrive indoors. Provide bright, indirect light; avoid direct sunlight, which can scorch the leaves. Maintain a consistently warm temperature between 75-85°F (24-29°C) and high humidity levels (70-80%). Water thoroughly when the top inch of soil feels dry, ensuring proper drainage to prevent root rot. Use a well-draining, slightly acidic potting mix. Fertilize sparingly with a balanced liquid fertilizer during the growing season (spring and summer). Repot young plants annually into slightly larger pots; mature plants may only need repotting every few years. Pruning is generally not required unless removing dead or damaged branches. Ensure consistent conditions and avoid sudden changes, as Mangosteen is sensitive to environmental stress.
How do I propagate Mangosteen?
Mangosteen propagation is challenging, even for experienced gardeners. Stem cuttings are the most common method, but success rates are low.
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: April 17, 2026 — Plant care data reviewed and verified by our editorial team.