Aralia vs New Zealand Flax Plant Comparison
Compare these two plants side by side — care needs, key differences, and which is right for your home.
Aralia
Aralia spinosa
Aralia spinosa, commonly known as Devil's Walking Stick, is a deciduous shrub or small tree typically reaching heights of 6-20 feet. It features a distinctive, sparsely branched habit with extremely large, bipinnately or tripinnately compound leaves, giving it a bold, architectural appearance. The stems are heavily armed with sharp spines, hence the name. It produces large panicles of small, white flowers in late summer, followed by dark purple berries. Primarily an outdoor plant, it is grown for its unique foliage and structural interest in gardens and naturalized areas. Attempting to grow it indoors is challenging due to its size and light requirements.
New Zealand Flax
Phormium tenax
Phormium tenax, commonly known as New Zealand Flax, is a large, evergreen perennial plant forming clumps of long, strap-like leaves. It's native to New Zealand and is primarily an outdoor plant, valued for its dramatic architectural form and fiber production. The leaves can grow up to 3 meters long and come in various colors, from green to bronze and variegated forms. While it can be grown indoors, it requires very bright light and significant space, making it challenging for most homes. People grow it for its striking appearance in gardens and landscapes.
Quick Plant Comparison
| Feature | Aralia | New Zealand Flax |
|---|---|---|
| Light | Full sun to partial shade | Full sun to partial shade outdoors. Indoors, requires extremely bright, direct sunlight for several hours daily. |
| Watering | Every 7-10 days during the growing season, less frequently in winter. | Every 1-2 weeks, depending on light and temperature. Less frequent in winter. |
| Humidity | 30-50% | 30-50% |
| Temperature | 15-27°C | 10-27°C |
| Care Level | Expert | Expert |
| Growth Rate | Fast | Moderate |
| Max Height | Difficult to maintain indoors, but if attempted, expect 1-2 meters. Outdoors: 2-6 meters. | 1-2 meters indoors (much larger outdoors) |
| Pet Safety | ❌ Toxic To Pets | ❌ Toxic To Pets |
| Soil | Well-draining soil, such as a mix of loam, sand, and compost. | Well-draining soil is crucial. A mix of potting soil, sand, and perlite is suitable. |
| Beginner Friendly | ❌ No | ❌ No |
| Weekly Maintenance | 30 minutes weekly (outdoor) | 30 minutes weekly |
🔬 Botanical Information — Comparing These Plants
Aralia
| Scientific Name | Aralia spinosa |
|---|---|
| Family | Araliaceae |
| Native To | Eastern North America |
| Also Known As | Devil's Walking Stick, Hercules' Club, Prickly Ash |
| Leaves | The leaves are extremely large, bipinnately or tripinnately compound, reaching up to 1 meter in length. Leaflets are ovate to lanceolate, with serrated edges and a dark green color. |
| Flowers | Produces large panicles of small, white flowers in late summer. Flowering is rare indoors. |
New Zealand Flax
| Scientific Name | Phormium tenax |
|---|---|
| Family | Asphodelaceae |
| Native To | New Zealand |
| Also Known As | New Zealand Flax, Harakeke |
| Leaves | Long, strap-like leaves that can grow up to 3 meters long. The leaves are stiff and leathery, with a smooth texture. Colors range from green to bronze, red, and variegated forms. |
| Flowers | Rarely flowers indoors. Outdoors, it produces tall flower stalks with reddish-brown flowers in summer. |
📏 Size & Growth — Plant Comparison
Aralia
New Zealand Flax
🌱 Propagation — Comparing Plant Growth
Aralia
Methods: Root suckers, Seed, Root cuttings
Difficulty: Moderate
Tips: Collect root suckers in spring or fall. Sow seeds in fall or stratify them before sowing in spring. Root cuttings should be taken in late winter.
New Zealand Flax
Methods: Division, Seed
Difficulty: Moderate
Tips: Division is best done in spring. Carefully separate the rhizomes and plant them in well-draining soil. Seeds can be sown in spring after soaking them in water for 24 hours.
✨ Benefits & Features — Comparing Plant Value
Aralia
Aralia spinosa is distinguished by its large, compound leaves and spiny stems, creating a bold and dramatic appearance. Its architectural form and wildlife value make it a unique addition to the landscape.
- ✓ Provides visual interest in the garden
- ✓ Attracts pollinators and birds
- ✓ Offers a unique architectural form
- ✓ Can be used as a specimen plant
- ✓ Provides shade in summer.
- ⚠️ Toxic to pets
New Zealand Flax
New Zealand Flax is known for its long, strap-like leaves and dramatic architectural form. It is a versatile plant that can be used in a variety of landscaping applications. The plant's fibers were traditionally used by the Maori people for weaving.
- ✓ Adds a dramatic architectural element to indoor or outdoor spaces.
- ✓ Provides a bold statement with its striking foliage.
- ✓ Offers a connection to New Zealand's natural heritage.
- ✓ Can be used as a privacy screen outdoors.
- ✓ Relatively low-maintenance once established (outdoors).
- ⚠️ Toxic to pets
📅 Maintenance Schedule — Plant Care Comparison
Aralia
New Zealand Flax
🌞 Light Requirements
Aralia
Full sun to partial shade
Low light tolerant: ❌ No
New Zealand Flax
Full sun to partial shade outdoors. Indoors, requires extremely bright, direct sunlight for several hours daily.
Low light tolerant: ❌ No
💧 Watering Needs
Aralia
Water deeply when the top inch of soil is dry. Avoid overwatering, which can lead to root rot. During the growing season, water more frequently. Reduce watering in the dormant season. Signs of underwatering include wilting leaves; overwatering includes yellowing leaves and soggy soil.
New Zealand Flax
Water thoroughly when the top inch of soil is dry. Overwatering can lead to root rot, especially indoors. Allow the soil to dry slightly between waterings. Signs of underwatering include drooping leaves; overwatering includes yellowing leaves and a soggy soil.
🌡️ Temperature & Humidity
Aralia
Temperature: 15-27°C
Humidity: 30-50%
New Zealand Flax
Temperature: 10-27°C
Humidity: 30-50%
🤔 Which Plant Is Right For You?
Aralia
Aralia spinosaExperienced gardeners seeking a unique, architectural plant for a large outdoor space.
✅ Choose This Plant If...
- You want a dramatic, architectural plant for your garden
- You need a plant that attracts pollinators
- You have a large outdoor space to accommodate its size
- You are an experienced gardener looking for a unique challenge
- You want a plant with interesting seasonal changes.
❌ Skip This Plant If...
- You have limited space indoors
- You are a beginner gardener
- You have pets that might ingest the plant
- You dislike plants with spines
- You want a low-maintenance indoor plant.
New Zealand Flax
Phormium tenaxExperienced plant enthusiasts with very bright indoor spaces or those looking for a striking outdoor plant.
✅ Choose This Plant If...
- You have a very bright, sunny indoor space and want a statement plant.
- You live in a mild climate and want a striking evergreen for your garden.
- You appreciate plants with architectural form and interesting foliage.
- You are interested in the traditional uses of plants and their cultural significance.
- You are an experienced plant owner looking for a challenging indoor plant project.
❌ Skip This Plant If...
- You have limited indoor space.
- You have pets that might ingest the plant.
- You struggle to provide bright, direct sunlight.
- You are a beginner plant owner.
- You tend to overwater your plants.
🎯 Quick Verdict
⚡ Key Differences Between These Plants
Aralia has fast growth, while New Zealand Flax grows moderate.
💡 Pro Tips For Comparing These Plants
Aralia Care Tips
Aralia spinosa is primarily an outdoor plant and is challenging to grow indoors due to its size, light requirements, and potential for aggressive spread via suckers. Indoor cultivation requires a very bright location, careful watering, and management of its growth habit. It's best suited for experienced gardeners.
- Provide well-draining soil to prevent root rot.
- Water deeply but infrequently, allowing the soil to dry slightly between waterings.
- Fertilize in spring and early summer with a balanced fertilizer.
- Prune regularly to control size and shape.
- Monitor for pests and diseases and treat promptly.
New Zealand Flax Care Tips
New Zealand Flax is primarily an outdoor plant and requires expert care to thrive indoors. It needs very bright light, well-draining soil, and careful watering to avoid root rot. Due to its size and light requirements, it's not well-suited for most indoor environments.
- Provide at least 6 hours of direct sunlight daily indoors.
- Ensure excellent drainage to prevent root rot.
- Water deeply but infrequently, allowing the soil to dry slightly between waterings.
- Fertilize regularly during the growing season.
- Monitor for pests and diseases and treat promptly.
⚠️ Common Problems & Solutions — Plant Care Comparison
Aralia
New Zealand Flax
❓ Frequently Asked Questions — Comparing These Plants
Aralia
What are the light requirements for Aralia?
Aralia thrives in bright, indirect light. Avoid direct sunlight, as it can burn the delicate leaves. An east-facing window is ideal, providing gentle morning light. If you only have south or west-facing windows, place the Aralia further away from the window or use sheer curtains to filter the light. Insufficient light can lead to leggy growth and leaf drop. Rotate the plant regularly to ensure even light exposure on all sides. During the darker winter months, consider supplementing with a grow light to maintain optimal growth. Monitor the plant’s leaves for signs of overexposure (scorching) or underexposure (yellowing).
How do I care for Aralia?
Aralia requires bright, indirect light to thrive. Avoid direct sunlight, which can scorch the leaves. Water thoroughly when the top inch of soil feels dry, ensuring good drainage to prevent root rot. Maintain a consistent watering schedule, but avoid overwatering. Aralia prefers a humid environment; mist the plant regularly or place it on a pebble tray filled with water. Fertilize monthly during the growing season (spring and summer) with a balanced liquid fertilizer diluted to half strength. Prune regularly to maintain shape and encourage bushier growth. Repot every 1-2 years into a slightly larger pot with well-draining potting mix. Maintain a stable temperature between 65-75°F (18-24°C) and protect from drafts.
How do I propagate Aralia?
Aralia 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 consistently moist. Cover with a plastic bag to increase humidity. Roots should develop in 4-6 weeks. For air layering, make a small cut on a stem and wrap it with moist sphagnum moss. Cover the moss with plastic wrap and secure it with tape. Once roots appear through the moss, cut the stem below the roots and pot it in soil. Provide bright, indirect light and consistent moisture.
New Zealand Flax
What are the light requirements for New Zealand Flax?
New Zealand Flax prefers bright, indirect light. Placing it near an east-facing window is ideal, as it receives gentle morning sun. A south-facing window can also work, but be sure to filter the light with a sheer curtain to prevent leaf burn. Insufficient light can lead to leggy growth and faded leaf colors. Rotate the plant regularly to ensure even light exposure on all sides. If natural light is limited, supplement with grow lights to maintain healthy growth. Consider the intensity and duration of light, aiming for at least 6 hours of bright, indirect light per day. Consistent light exposure is crucial for vibrant foliage.
How do I care for New Zealand Flax?
New Zealand Flax thrives with bright, indirect light; avoid direct sunlight to prevent scorching. Water thoroughly when the top inch of soil feels dry, ensuring good drainage to prevent root rot. Maintain moderate humidity levels. Ideal temperatures range from 60-80°F (15-27°C). Fertilize during the growing season (spring and summer) with a balanced liquid fertilizer diluted to half strength every 4-6 weeks. Repot every 2-3 years or when the plant becomes root-bound, using a well-draining potting mix. Prune dead or damaged leaves regularly to maintain appearance and promote healthy growth. Provide adequate ventilation to prevent fungal diseases. Monitor for pests such as spider mites and treat promptly. Stable conditions are key to success.
How do I propagate New Zealand Flax?
New Zealand Flax can be propagated through stem cuttings or division. For stem cuttings, take a healthy cutting from a mature plant, ensuring it has at least one node. Remove the lower leaves and place the cutting in water or directly into a well-draining potting mix. Keep the cutting moist and in a warm, bright location until roots develop. For division, carefully separate the root ball of a mature plant into smaller sections, ensuring each section has healthy roots and foliage. Plant each section in its own pot with well-draining potting mix. Water thoroughly and keep in a warm, bright location. Propagation is best done in spring or summer. Use rooting hormone to improve success rates.
Last updated: April 30, 2026 — Plant care data reviewed and verified by our editorial team.