Hackberry vs Immortelle Plant Comparison
Compare these two plants side by side — care needs, key differences, and which is right for your home.
Hackberry
Celtis occidentalis
The Common Hackberry is a medium to large deciduous tree, typically reaching 50-70 feet in height, though it can grow taller. It has a distinctive warty bark and an asymmetrical crown. The leaves are ovate with serrated edges. Hackberries are primarily outdoor trees, valued for their tolerance of urban conditions, including pollution and poor soil. They produce small, berry-like drupes that are attractive to birds and other wildlife. While adaptable, they are not suited for indoor cultivation due to their size and high light requirements.
Immortelle
Helichrysum arenarium
Helichrysum arenarium, commonly known as Immortelle or Dwarf Everlast, is a perennial herbaceous plant characterized by its woolly, grey-green foliage and clusters of bright yellow, papery flowers. It typically grows to a height of 10-30 cm. Native to sandy and dry habitats, it is valued for its long-lasting flowers that retain their color and shape even when dried. This makes it a popular choice for dried flower arrangements and potpourri. It is primarily an outdoor plant, thriving in sunny, well-drained conditions. While it can be grown in containers, it requires specific conditions to flourish indoors.
Quick Plant Comparison
| Feature | Hackberry | Immortelle |
|---|---|---|
| Light | Full sun (at least 6 hours of direct sunlight per day) | Full sun |
| Watering | Once a week during the growing season (adjust based on rainfall and soil drainage) | Every 1-2 weeks, depending on environmental conditions |
| Humidity | 30-50% | 30-50% |
| Temperature | 10-30°C | 15-25°C |
| Care Level | Expert | Expert |
| Growth Rate | Moderate | Moderate |
| Max Height | Not applicable for indoor growing. Outdoors: 50-70 feet (15-21 meters) | 0.1-0.3 meters (indoors, likely smaller) |
| Pet Safety | ✅ Safe | ✅ Safe |
| Soil | Well-draining soil; adaptable to various soil types, including clay, loam, and sand. | Well-draining sandy or loamy soil |
| Beginner Friendly | ❌ No | ❌ No |
| Weekly Maintenance | 15 minutes monthly (primarily for pruning and monitoring for pests/diseases) | 10 minutes weekly |
🔬 Botanical Information — Comparing These Plants
Hackberry
| Scientific Name | Celtis occidentalis |
|---|---|
| Family | Cannabaceae |
| Native To | Eastern and Central North America |
| Also Known As | Common Hackberry, Northern Hackberry, American Hackberry, Nettletree, Sugarberry |
| Leaves | Ovate to lanceolate leaves, 2-5 inches long, with serrated edges. The upper surface is dark green and smooth, while the underside is paler and slightly hairy. Leaves turn yellow in the fall. |
| Flowers | Inconspicuous greenish flowers appear in spring, typically not noticeable. |
Immortelle
| Scientific Name | Helichrysum arenarium |
|---|---|
| Family | Asteraceae |
| Native To | Europe and Asia |
| Also Known As | Dwarf Everlast, Immortelle, Sandy Everlasting, Goldilocks |
| Leaves | The leaves are small, narrow, and covered in fine, silvery-grey hairs, giving them a woolly texture. They are typically lance-shaped and arranged alternately along the stems. |
| Flowers | Helichrysum arenarium produces clusters of bright yellow, papery flowers in summer. The flowers are small and daisy-like, with a distinctive papery texture that allows them to retain their shape and color when dried. Flowering is unlikely indoors. |
📏 Size & Growth — Plant Comparison
Hackberry
Immortelle
🌱 Propagation — Comparing Plant Growth
Hackberry
Methods: Seed, cuttings, grafting
Difficulty: Moderate
Tips: Seeds require stratification (cold treatment) for several months to break dormancy. Cuttings should be taken from semi-hardwood in summer.
Immortelle
Methods: Seed, Division, Stem cuttings
Difficulty: Moderate
Tips: For seeds, sow in spring in well-draining soil. Division can be done in spring or fall. Stem cuttings should be taken in late spring or early summer and rooted in a well-draining medium.
✨ Benefits & Features — Comparing Plant Value
Hackberry
Hackberry has distinctive warty bark and asymmetrical crown. The berries provide food for wildlife, especially birds, during the winter months. It is highly adaptable to various soil types and urban conditions.
- ✓ Provides shade and cooling during hot weather
- ✓ Attracts birds and other wildlife to the garden
- ✓ Tolerates a wide range of soil conditions
- ✓ Requires minimal maintenance once established
- ✓ Adds visual interest to the landscape with its unique bark and berries.
- 🐾 Pet Safe
Immortelle
The flowers of Helichrysum arenarium retain their color and shape when dried, making them ideal for dried flower arrangements. It is also known for its aromatic foliage, which releases a pleasant scent when touched.
- ✓ Provides beautiful dried flowers for arrangements.
- ✓ Attracts pollinators to the garden.
- ✓ Drought-tolerant and low-maintenance in suitable conditions.
- ✓ Adds visual interest with its silver-grey foliage and bright yellow flowers.
- ✓ Aromatic foliage releases a pleasant scent.
- 🐾 Pet Safe
📅 Maintenance Schedule — Plant Care Comparison
Hackberry
Immortelle
🌞 Light Requirements
Hackberry
Full sun (at least 6 hours of direct sunlight per day)
Low light tolerant: ❌ No
Immortelle
Full sun
Low light tolerant: ❌ No
💧 Watering Needs
Hackberry
Water deeply when the top few inches of soil are dry. Established trees are drought-tolerant. Overwatering can lead to root rot, indicated by yellowing leaves and a musty smell in the soil. Underwatering results in wilting and leaf drop.
Immortelle
Water thoroughly when the top inch of soil is dry. Avoid overwatering, as this can lead to root rot. Allow the soil to dry out slightly between waterings. Signs of overwatering include yellowing leaves and a soggy soil surface. Underwatering is indicated by wilting and dry, crispy leaves.
🌡️ Temperature & Humidity
Hackberry
Temperature: 10-30°C
Humidity: 30-50%
Immortelle
Temperature: 15-25°C
Humidity: 30-50%
🤔 Which Plant Is Right For You?
Hackberry
Celtis occidentalisLandowners seeking a hardy, adaptable shade tree that attracts wildlife.
✅ Choose This Plant If...
- You need a hardy shade tree for a large outdoor space
- You want to attract birds and butterflies to your yard
- You have poor soil conditions where other trees struggle
- You live in an urban environment with pollution
- You want a relatively low-maintenance tree once established.
❌ Skip This Plant If...
- You are looking for an indoor plant
- You have a small yard or limited space
- You prefer evergreen trees.
Immortelle
Helichrysum arenariumExperienced gardeners looking for a drought-tolerant, low-maintenance plant for sunny outdoor locations.
✅ Choose This Plant If...
- You want a plant with flowers that dry beautifully and retain their color.
- You have a sunny, well-drained garden or rock garden.
- You are looking for a drought-tolerant plant.
- You appreciate aromatic foliage.
- You want to attract pollinators to your garden.
❌ Skip This Plant If...
- You do not have a location with full sun.
- You tend to overwater plants.
- You are looking for a low-maintenance indoor plant.
🎯 Quick Verdict
⚡ Key Differences Between These Plants
Hackberry needs full sun (at least 6 hours of direct sunlight per day), while Immortelle prefers full sun.
💡 Pro Tips For Comparing These Plants
Hackberry Care Tips
Hackberries are outdoor trees and are not suitable for indoor growing. They require full sun, well-draining soil, and adequate space to grow. Indoor attempts will likely fail due to insufficient light and space.
- Plant in well-draining soil to prevent root rot.
- Water deeply during the first year to establish a strong root system.
- Protect young trees from deer browsing with fencing or tree guards.
- Prune regularly to remove dead or damaged branches and maintain shape.
- Monitor for pests and diseases and treat promptly.
Immortelle Care Tips
Helichrysum arenarium is primarily an outdoor plant that requires full sun and well-drained soil. Growing it indoors can be challenging due to its high light requirements. It needs very bright light and careful watering to prevent root rot. Regular fertilization is also necessary to promote healthy growth and flowering.
- Ensure excellent drainage to prevent root rot.
- Provide at least 6-8 hours of direct sunlight daily.
- Water deeply but infrequently, allowing the soil to dry out between waterings.
- Fertilize sparingly, as excessive fertilization can reduce flowering.
- Prune after flowering to maintain shape and encourage bushier growth.
⚠️ Common Problems & Solutions — Plant Care Comparison
Hackberry
Immortelle
❓ Frequently Asked Questions — Comparing These Plants
Hackberry
What are the light requirements for Hackberry?
Hackberry prefers bright, indirect light. Insufficient light can lead to leggy growth and pale leaves. Place your Hackberry near an east- or west-facing window where it can receive several hours of gentle sunlight. Avoid direct sunlight, especially during the hottest part of the day, as this can scorch the leaves. If you don’t have access to sufficient natural light, consider supplementing with a grow light. Rotate your Hackberry regularly to ensure even light exposure on all sides. Observe your tree for signs of light stress, such as yellowing or browning leaves, and adjust its placement accordingly.
How do I care for Hackberry?
Hackberry thrives in bright, indirect light; avoid direct sunlight. Water thoroughly when the top inch of soil is dry, ensuring proper drainage to prevent root rot. Maintain moderate humidity levels, especially during dry months. Fertilize monthly during the growing season (spring and summer) with a balanced liquid fertilizer diluted to half strength. Repot every 2-3 years, or when the tree becomes root-bound, using a well-draining potting mix. Prune regularly to maintain shape and remove any dead or damaged branches. Protect from drafts and sudden temperature changes. Monitor for pests, such as spider mites or aphids, and treat promptly with insecticidal soap. Provide good air circulation to prevent fungal diseases. Maintain stable conditions for best growth.
How do I propagate Hackberry?
Hackberry can be propagated through stem cuttings or air layering. For stem cuttings, take a 4-6 inch cutting from a healthy stem in spring or early 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 and humid. For air layering, make a small incision on a stem and wrap it with moist sphagnum moss. Cover the moss with plastic wrap and secure it tightly. After a few weeks, roots will begin to form in the moss. Once the roots are well-developed, cut the stem below the rooted section and plant it in a pot. Provide consistent moisture and humidity for both methods.
Immortelle
What are the light requirements for Immortelle?
Immortelle requires ample sunlight to produce abundant and vibrant blooms. Aim for at least 6 hours of direct sunlight per day. In hotter climates, provide some afternoon shade to prevent scorching. If grown indoors, place Immortelle near a south-facing window where it can receive maximum light exposure. Insufficient light can lead to leggy growth, reduced flowering, and faded colors. Rotate the plant regularly to ensure even light exposure on all sides. During winter months, when sunlight is limited, consider supplementing with grow lights to maintain optimal light levels.
How do I care for Immortelle?
Immortelle thrives with proper care. Provide full sun to partial shade, ensuring at least six hours of sunlight daily for optimal blooming. Water thoroughly when the top inch of soil feels dry, allowing excess water to drain. Use well-draining soil to prevent root rot. Fertilize every 2-4 weeks during the growing season (spring and summer) with a balanced liquid fertilizer, diluted to half strength. Deadhead spent flowers to encourage continuous blooming. Maintain moderate humidity levels. Protect from frost in colder climates. Repot in spring if the plant becomes root-bound. Prune lightly to maintain shape and encourage bushier growth. Monitor for pests and diseases, addressing promptly with appropriate treatments.
How do I propagate Immortelle?
Immortelle can be propagated through stem cuttings, division, and keiki (though keiki is less common). For stem cuttings, take a 4-6 inch cutting from a healthy stem, removing the lower leaves. Dip the cut end in rooting hormone and plant in well-draining soil. Keep the soil moist and provide bright, indirect light. For division, carefully separate the root ball into smaller sections, ensuring each section has healthy roots and foliage. Replant each section in its own pot. Rooting typically takes several weeks.
Last updated: May 3, 2026 — Plant care data reviewed and verified by our editorial team.