Heliotrope vs Natal Plum Plant Comparison
Compare these two plants side by side — care needs, key differences, and which is right for your home.
Heliotrope
Heliotropium arborescens
Heliotropium arborescens, commonly known as Heliotrope, is a tender perennial shrub typically grown as an annual in cooler climates. It's prized for its intensely fragrant, vanilla-scented flowers, which are usually a deep purple or blue, though cultivars with white or pink flowers exist. The plant has a bushy growth habit and can reach a height of 1-4 feet. While it can be grown indoors, it requires very bright light and consistent care to thrive. People grow it for its beautiful, fragrant flowers that attract pollinators.
Natal Plum
Carissa macrocarpa
Carissa macrocarpa, or Natal Plum, is a dense, evergreen shrub or small tree known for its glossy, dark green leaves and fragrant, star-shaped white flowers. It produces edible, plum-like red fruits that are rich in vitamin C. While it can be grown in containers, it's primarily an outdoor plant, thriving in warm climates. People grow it for its ornamental value, edible fruit, and use as a security hedge due to its thorny branches. It's not ideally suited as an indoor plant due to high light requirements and potential size.
Quick Plant Comparison
| Feature | Heliotrope | Natal Plum |
|---|---|---|
| Light | Full sun to partial shade. Requires at least 6 hours of direct sunlight daily for optimal flowering. | Full sun to partial shade. Requires at least 6 hours of direct sunlight daily to thrive and produce fruit. |
| Watering | Every 2-5 days, depending on temperature and humidity | Every 7-14 days, depending on environmental conditions and pot size. |
| Humidity | 40-60% | 40-60% |
| Temperature | 18-24°C | 18-27°C |
| Care Level | Expert | Expert |
| Growth Rate | Moderate | Moderate |
| Max Height | 0.3-1.2 meters (1-4 feet) indoors, smaller than outdoor growth | Indoors: Rarely exceeds 1-2 meters. Outdoors: Up to 4 meters. |
| Pet Safety | ❌ Toxic To Pets | ❌ Toxic To Pets |
| Soil | Well-draining potting mix, such as a mix of peat moss, perlite, and vermiculite. | Well-draining soil mix, such as a combination of potting soil, perlite, and sand. |
| Beginner Friendly | ❌ No | ❌ No |
| Weekly Maintenance | 30 minutes weekly | 30 minutes weekly (including watering, pruning, and pest control) |
🔬 Botanical Information — Comparing These Plants
Heliotrope
| Scientific Name | Heliotropium arborescens |
|---|---|
| Family | Boraginaceae |
| Native To | Peru |
| Also Known As | Heliotrope, Cherry Pie Plant |
| Leaves | The leaves are ovate to lance-shaped, usually dark green, and have a slightly rough texture. They are typically 2-4 inches long and arranged alternately along the stems. |
| Flowers | Heliotrope can flower indoors if provided with sufficient light, but flowering is more prolific outdoors. The flowers are small, clustered in rounded or flat-topped cymes, and typically deep purple or blue, though white and pink cultivars exist. The fragrance is strong and vanilla-like. |
Natal Plum
| Scientific Name | Carissa macrocarpa |
|---|---|
| Family | Apocynaceae |
| Native To | South Africa |
| Also Known As | Natal Plum, Large Num-Num |
| Leaves | The leaves are glossy, dark green, and oval-shaped, measuring 2-5 cm in length. They are arranged oppositely on the stems and have a leathery texture. |
| Flowers | Natal Plum produces fragrant, star-shaped white flowers in spring and summer. While it can flower indoors with sufficient light, fruit production is less common. |
📏 Size & Growth — Plant Comparison
Heliotrope
Natal Plum
🌱 Propagation — Comparing Plant Growth
Heliotrope
Methods: Stem cuttings, Seed
Difficulty: Moderate
Tips: Take stem cuttings in spring or early 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. Seeds can be sown indoors 6-8 weeks before the last frost.
Natal Plum
Methods: Stem cuttings, Seed
Difficulty: Moderate
Tips: Take semi-hardwood 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
Heliotrope
The most unique characteristic is its intensely fragrant, vanilla-like scent. The flowers also exhibit heliotropism, turning to face the sun throughout the day, though this is less pronounced in some cultivars.
- ✓ Fragrant flowers enhance the ambiance of a room.
- ✓ Attracts pollinators to outdoor gardens.
- ✓ Provides a visually appealing display of purple or blue flowers.
- ✓ Can be used in cut flower arrangements.
- ✓ Offers a rewarding challenge for experienced gardeners.
- ⚠️ Toxic to pets
Natal Plum
The Natal Plum is unique for its combination of fragrant flowers, edible fruit, and thorny branches. Its drought tolerance makes it a suitable choice for xeriscaping.
- ✓ Provides edible fruit rich in Vitamin C
- ✓ Offers fragrant flowers that attract pollinators
- ✓ Acts as a natural security barrier due to its thorns
- ✓ Adds an ornamental touch to gardens with its glossy foliage
- ✓ Can be used in traditional medicine (with caution and expert knowledge)
- ⚠️ Toxic to pets
📅 Maintenance Schedule — Plant Care Comparison
Heliotrope
Natal Plum
🌞 Light Requirements
Heliotrope
Full sun to partial shade. Requires at least 6 hours of direct sunlight daily for optimal flowering.
Low light tolerant: ❌ No
Natal Plum
Full sun to partial shade. Requires at least 6 hours of direct sunlight daily to thrive and produce fruit.
Low light tolerant: ❌ No
💧 Watering Needs
Heliotrope
Water thoroughly when the top inch of soil feels dry to the touch. Avoid overwatering, which can lead to root rot. Allow the soil to drain completely after watering. Signs of underwatering include wilting leaves, while overwatering can cause yellowing leaves and stem rot.
Natal Plum
Water deeply when the top inch of soil is dry. Avoid overwatering, which can lead to root rot. Allow the soil to dry slightly between waterings. Signs of underwatering include wilting leaves; overwatering includes yellowing leaves and soggy soil.
🌡️ Temperature & Humidity
Heliotrope
Temperature: 18-24°C
Humidity: 40-60%
Natal Plum
Temperature: 18-27°C
Humidity: 40-60%
🤔 Which Plant Is Right For You?
Heliotrope
Heliotropium arborescensExperienced gardeners who can provide ample sunlight and consistent care.
✅ Choose This Plant If...
- You desire intensely fragrant flowers that fill a room with a vanilla scent.
- You have a very sunny location, such as a sunroom or greenhouse, to provide ample light.
- You are an experienced gardener comfortable with managing pests and diseases.
- You want to attract pollinators like butterflies and bees to your outdoor space.
- You enjoy the challenge of growing plants that are not typically suited for indoor environments.
❌ Skip This Plant If...
- You have pets that may ingest the plant, as it is toxic to them.
- You cannot provide at least 6 hours of direct sunlight daily.
- You are a beginner gardener looking for an easy-to-care-for houseplant.
Natal Plum
Carissa macrocarpaExperienced gardeners in warm climates who want an ornamental shrub with edible fruit, and who can ensure it is kept away from pets.
✅ Choose This Plant If...
- You live in a warm climate with plenty of sunshine.
- You want an ornamental shrub with fragrant flowers and edible fruit.
- You need a natural barrier or security hedge.
- You are an experienced gardener looking for a new challenge.
- You are willing to provide the specific care this plant needs.
❌ Skip This Plant If...
- You have pets or small children due to the plant's toxicity.
- You live in a cold climate with limited sunlight.
- You are a beginner gardener.
- You don't have space for a large shrub.
- You are looking for a low-maintenance indoor plant.
🎯 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
Heliotrope Care Tips
Heliotrope is challenging to grow indoors due to its high light requirements and susceptibility to pests. It needs consistent watering, fertilization, and pruning to maintain its shape. Providing adequate sunlight is crucial for flowering. It is best suited for outdoor gardens or greenhouses.
- Provide at least 6 hours of direct sunlight daily; supplement with grow lights if necessary.
- Water thoroughly when the top inch of soil feels dry, but avoid overwatering.
- Fertilize regularly during the growing season with a balanced liquid fertilizer.
- Prune regularly to encourage bushier growth and more flowers.
- Monitor for pests and diseases and treat promptly.
Natal Plum Care Tips
Natal Plum is primarily an outdoor plant and requires significant sunlight to thrive. Growing it indoors is challenging due to its high light needs and potential size. It needs well-draining soil, moderate watering, and occasional fertilization. Toxicity to pets is a major concern.
- Provide at least 6 hours of direct sunlight daily for optimal growth and fruit production.
- Water deeply but infrequently, allowing the soil to dry slightly between waterings.
- Fertilize regularly during the growing season with a balanced fertilizer.
- Prune regularly to maintain shape and encourage new growth.
- Protect from frost in colder climates.
⚠️ Common Problems & Solutions — Plant Care Comparison
Heliotrope
Natal Plum
❓ Frequently Asked Questions — Comparing These Plants
Heliotrope
What are the light requirements for Heliotrope?
Heliotrope flourishes in bright, indirect sunlight. While it can tolerate some direct morning sun, avoid harsh afternoon sun which can scorch the leaves. An east-facing window is often ideal. Insufficient light can lead to leggy growth and reduced flowering. Rotate the plant regularly to ensure even light exposure on all sides, preventing it from leaning excessively towards the light source. If natural light is limited, supplement with grow lights to provide the necessary intensity for healthy growth and abundant blooms. Observe the plant for signs of stress, such as pale leaves or stretched stems, which may indicate insufficient light.
How do I care for Heliotrope?
Heliotrope thrives in well-draining soil and requires regular watering, allowing the top inch of soil to dry out between waterings. Provide bright, indirect sunlight, preferably with some direct morning sun. Fertilize every 2-3 weeks during the growing season (spring and summer) with a balanced liquid fertilizer diluted to half strength to encourage blooming. Prune regularly to maintain shape and promote bushier growth. Deadhead spent flowers to encourage further blooming. Protect from frost as Heliotrope is sensitive to cold temperatures. Ensure good air circulation to prevent fungal diseases. Repot annually in spring to refresh the soil. Monitor for pests like aphids and spider mites and treat promptly. Maintain moderate humidity levels.
How do I propagate Heliotrope?
Heliotrope can be propagated through stem cuttings. Take 4-6 inch cuttings from healthy stems, removing the lower leaves. 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 in 4-6 weeks. Once rooted, transplant the cuttings into individual pots. Division is also possible with established plants, carefully separating the root ball in spring. While Heliotrope does not produce keikis, stem cuttings are the most effective propagation method. Ensure humidity is high during rooting.
Natal Plum
What are the light requirements for Natal Plum?
Natal Plum requires ample sunlight to flourish and produce its characteristic blooms and fruits. Ideally, it should receive at least 6 hours of direct sunlight per day. In regions with intense sunlight, particularly during the hottest part of the day, providing some afternoon shade can prevent leaf scorch.
How do I care for Natal Plum?
Natal Plum thrives in full sun to partial shade. Ensure at least 6 hours of sunlight daily for optimal flowering and fruit production. Water thoroughly when the top inch of soil feels dry, allowing excess water to drain. Avoid overwatering, which can lead to root rot. Maintain moderate humidity, especially indoors.
How do I propagate Natal Plum?
Natal Plum can be propagated through stem cuttings. Take 4-6 inch stem cuttings from healthy, non-flowering shoots 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.
Last updated: May 9, 2026 — Plant care data reviewed and verified by our editorial team.