Brake Fern vs Crown of Thorns Plant Comparison
Compare these two plants side by side — care needs, key differences, and which is right for your home.
Brake Fern
Pteridium aquilinum
Bracken fern is a large, coarse, deciduous fern characterized by its widely creeping rhizomes and erect, triangular fronds. It is one of the most widely distributed ferns in the world, thriving in diverse habitats from open woodlands to heathlands. Its fronds can reach impressive sizes, often exceeding 1 meter in height. While valued for its adaptability and soil-stabilizing properties in natural landscapes, it is generally not cultivated as an indoor plant due to its size, specific environmental needs, and potential toxicity. People may encounter it in the wild or in large outdoor gardens.
Crown of Thorns
Euphorbia milii
Euphorbia milii, commonly known as Crown of Thorns, is a succulent shrub characterized by its thorny stems and vibrant bracts surrounding small, inconspicuous flowers. Native to Madagascar, it is a popular ornamental plant grown for its drought tolerance and long-lasting blooms. It typically grows as a sprawling shrub, reaching up to 1-2 meters in height. While it can be grown indoors, it thrives best with ample sunlight, often making it more suitable as an outdoor plant in warmer climates. People grow it for its unique appearance and relatively easy care.
Quick Plant Comparison
| Feature | Brake Fern | Crown of Thorns |
|---|---|---|
| Light | Full sun to partial shade | Requires at least 4-6 hours of direct sunlight daily. Insufficient light will result in leggy growth and reduced flowering. |
| Watering | Every 5-7 days outdoors during the growing season, less frequently in dormancy. | Every 2-3 weeks, depending on environmental conditions and pot size. |
| Humidity | 30-60% | 30-50% |
| Temperature | 10-25°C | 18-27°C |
| Care Level | Expert | Moderate |
| Growth Rate | Fast | Slow |
| Max Height | 0.5-2 meters outdoors | 0.3-0.6 meters (indoors) |
| Pet Safety | ❌ Toxic To Pets | ❌ Toxic To Pets |
| Soil | Well-drained, slightly acidic soil rich in organic matter | Well-draining succulent or cactus mix |
| Beginner Friendly | ❌ No | With Caution |
| Weekly Maintenance | 15 minutes weekly outdoors (controlling spread, removing dead fronds) | 10 minutes weekly |
🔬 Botanical Information — Comparing These Plants
Brake Fern
| Scientific Name | Pteridium aquilinum |
|---|---|
| Family | Dennstaedtiaceae |
| Native To | Cosmopolitan; found worldwide except for Antarctica |
| Also Known As | Bracken Fern, Eagle Fern, Hog Pasture Fern |
| Leaves | Large, triangular fronds that are deeply divided into multiple segments (pinnate-pinnatifid). The fronds are typically green but can turn brown in the fall. The texture is coarse and leathery. |
| Flowers | Ferns do not produce flowers. They reproduce via spores, which are located on the underside of the fronds in structures called sori. |
Crown of Thorns
| Scientific Name | Euphorbia milii |
|---|---|
| Family | Euphorbiaceae |
| Native To | Madagascar |
| Also Known As | Crown of Thorns, Christ Plant, Christ Thorn |
| Leaves | The leaves are small, oval-shaped, and typically bright green. They are deciduous, meaning they may drop off during periods of stress or dormancy, especially in winter. |
| Flowers | It can flower indoors, but flowering is more prolific with ample sunlight. The true flowers are small and inconspicuous, surrounded by colorful bracts that can be red, pink, yellow, or white. |
📏 Size & Growth — Plant Comparison
Brake Fern
Crown of Thorns
🌱 Propagation — Comparing Plant Growth
Brake Fern
Methods: Rhizome division, spores
Difficulty: Moderate
Tips: Divide rhizomes in early spring or late fall. Spores require a humid environment and can be challenging to germinate.
Crown of Thorns
Methods: Stem cuttings
Difficulty: Easy
Tips: Allow the cut end to callus over for a few days before planting in well-draining soil. Use rooting hormone for better success.
✨ Benefits & Features — Comparing Plant Value
Brake Fern
Bracken fern is one of the most widespread ferns in the world, known for its adaptability and aggressive spreading habit. Its large, triangular fronds and creeping rhizomes distinguish it from other ferns.
- ✓ Soil stabilization and erosion control.
- ✓ Provides habitat and cover for wildlife.
- ✓ Adaptable to a wide range of soil conditions.
- ✓ Adds a natural, wild aesthetic to the landscape.
- ✓ Relatively low-maintenance once established.
- ⚠️ Toxic to pets
Crown of Thorns
The Crown of Thorns is unique due to its thorny stems and the colorful bracts that surround its small flowers. Unlike many flowering plants, the bracts provide color for extended periods, making it a long-lasting ornamental plant.
- ✓ Drought tolerance makes it easy to care for
- ✓ Long-lasting blooms add color to your space
- ✓ Unique appearance provides visual interest
- ✓ Can tolerate neglect, making it suitable for busy individuals
- ✓ Adds a touch of history and symbolism to your plant collection
- ⚠️ Toxic to pets
📅 Maintenance Schedule — Plant Care Comparison
Brake Fern
Crown of Thorns
🌞 Light Requirements
Brake Fern
Full sun to partial shade
Low light tolerant: ❌ No
Crown of Thorns
Requires at least 4-6 hours of direct sunlight daily. Insufficient light will result in leggy growth and reduced flowering.
Low light tolerant: ❌ No
💧 Watering Needs
Brake Fern
Water deeply when the top inch of soil feels dry. Avoid overwatering, which can lead to rhizome rot. Bracken fern prefers consistently moist but well-drained soil. Signs of underwatering include drooping or browning fronds. Overwatering can cause yellowing and mushy rhizomes.
Crown of Thorns
Allow the soil to dry out completely between waterings. Overwatering can lead to root rot. Water thoroughly when the soil is dry to the touch. Signs of overwatering include yellowing leaves and stem rot. Underwatering will cause leaf drop and shriveling.
🌡️ Temperature & Humidity
Brake Fern
Temperature: 10-25°C
Humidity: 30-60%
Crown of Thorns
Temperature: 18-27°C
Humidity: 30-50%
🤔 Which Plant Is Right For You?
Brake Fern
Pteridium aquilinumExperienced gardeners looking to fill a large outdoor space with a hardy, adaptable fern.
✅ Choose This Plant If...
- You have a large outdoor space to fill with a low-maintenance ground cover.
- You want a plant that is highly adaptable to different soil types.
- You need a plant that can help stabilize soil and prevent erosion.
- You want to create a naturalistic woodland garden.
- You are looking for a plant that provides habitat for wildlife.
❌ Skip This Plant If...
- You have limited space, as it spreads aggressively.
- You have pets or small children due to its toxicity.
- You are looking for an easy-to-care-for indoor plant.
Crown of Thorns
Euphorbia miliiExperienced plant owners who can provide bright light and are aware of the plant's toxicity.
✅ Choose This Plant If...
- You want a drought-tolerant plant that flowers for a long period.
- You have a sunny location where the plant can thrive.
- You are experienced with caring for succulents and understand their watering needs.
- You are looking for a unique and interesting plant with a historical connection.
- You can keep the plant away from pets and children due to its toxicity.
❌ Skip This Plant If...
- You have pets or small children who might ingest the plant.
- You cannot provide adequate sunlight.
- You tend to overwater plants.
- You are looking for a low-maintenance plant that thrives in low-light conditions.
🎯 Quick Verdict
⚡ Key Differences Between These Plants
Brake Fern is rated Expert care level, while Crown of Thorns is Moderate.
Brake Fern has fast growth, while Crown of Thorns grows slow.
💡 Pro Tips For Comparing These Plants
Brake Fern Care Tips
Bracken fern is primarily an outdoor plant and is challenging to grow indoors due to its size, light requirements, and aggressive spreading habit. It requires ample space, well-drained soil, and specific humidity levels. It is also toxic to pets, making it a less desirable indoor plant.
- Provide ample space for the plant to spread.
- Monitor for signs of rhizome rot and adjust watering accordingly.
- Control spread by using physical barriers or regular pruning.
- Fertilize sparingly, as bracken fern is adapted to nutrient-poor soils.
- Remove dead fronds in late fall or early spring to maintain a tidy appearance.
Crown of Thorns Care Tips
Crown of Thorns requires bright sunlight and well-draining soil. Overwatering is a common issue. It can be grown indoors with sufficient light, but may not flower as profusely as when grown outdoors. Toxicity to pets is a significant concern.
- Provide at least 4-6 hours of direct sunlight daily for optimal growth and flowering.
- Allow the soil to dry out completely between waterings to prevent root rot.
- Use a well-draining succulent or cactus mix to ensure proper drainage.
- Fertilize sparingly during the growing season with a balanced liquid fertilizer.
- Wear gloves when pruning or handling the plant to avoid skin irritation from the sap.
⚠️ Common Problems & Solutions — Plant Care Comparison
Brake Fern
Crown of Thorns
❓ Frequently Asked Questions — Comparing These Plants
Brake Fern
What are the light requirements for Brake Fern?
Brake Ferns require bright, indirect light to thrive. Direct sunlight can scorch their delicate fronds, causing browning and damage. The ideal location is near an east-facing window or a few feet away from a south- or west-facing window with sheer curtains to filter the light. Insufficient light can lead to leggy growth and pale foliage. If your fern isn’t getting enough natural light, consider supplementing with a grow light. Rotate the plant regularly to ensure even exposure to light, promoting balanced growth on all sides. Monitor the plant’s foliage for signs of light stress, adjusting its position as needed to maintain healthy, vibrant growth.
How do I care for Brake Fern?
Brake Ferns thrive in bright, indirect light and consistently moist soil. Water thoroughly when the top inch of soil feels dry, ensuring good drainage to prevent root rot. Maintain high humidity by misting regularly or using a humidifier. The ideal temperature range is between 65-75°F (18-24°C). Fertilize monthly during the growing season (spring and summer) with a diluted, balanced liquid fertilizer. Repot in spring every 1-2 years into a slightly larger pot with well-draining potting mix. Prune away any yellowing or dead fronds to encourage new growth and maintain a tidy appearance. Protect from drafts and sudden temperature changes. Monitor for pests such as mealybugs or scale and treat promptly if detected. Proper air circulation is essential to prevent fungal diseases.
How do I propagate Brake Fern?
Brake Ferns can be propagated through division or by spores. For division, carefully separate the rhizome into sections, ensuring each section has healthy fronds and roots. Plant each section in its own pot with well-draining potting mix. To propagate by spores, collect spores from mature fronds and sow them on a moist, sterile growing medium in a humid environment. Keep the medium consistently moist and provide bright, indirect light. Spores require patience as they take several weeks to germinate. Once small plantlets develop, transplant them into individual pots. Both methods are best done in spring. Ensure high humidity during propagation for best results.
Crown of Thorns
What are the light requirements for Crown of Thorns?
Crown of Thorns requires bright, direct sunlight to thrive. Ideally, place it in a south-facing window where it can receive at least 4-6 hours of sunlight per day. Insufficient light can lead to leggy growth, reduced flowering, and a loss of vibrancy in the bracts. If you don’t have a sufficiently sunny window, consider supplementing with a grow light. Rotate the plant regularly to ensure even light exposure on all sides. During the summer months, you can move your Crown of Thorns outdoors to a sunny location, but be sure to acclimate it gradually to avoid sunburn. The plant’s ability to flower profusely depends on adequate light.
How do I care for Crown of Thorns?
Crown of Thorns thrives on neglect, making it an easy-care succulent. Plant it in well-draining soil, such as a cactus mix, to prevent root rot. Provide it with bright, direct sunlight for at least 4-6 hours daily. Water sparingly, allowing the soil to dry completely between waterings. Reduce watering frequency during the dormant winter months. Fertilize lightly during the growing season (spring and summer) with a balanced liquid fertilizer diluted to half strength. Maintain a room temperature between 65-75°F (18-24°C). Avoid overwatering, as this is the most common cause of problems. Repot every 2-3 years, or when the plant becomes root-bound. Prune to maintain shape and remove dead or damaged stems. Be cautious of the milky sap, which can be irritating to the skin and eyes.
How do I propagate Crown of Thorns?
Crown of Thorns can be propagated through stem cuttings. Allow the cut end to callous over for several days before planting in well-draining soil. Keep the soil slightly moist until roots develop. Leaf cuttings are not generally successful. Offsets, or small plantlets that grow at the base of the plant, can be carefully separated and potted individually. Wear gloves to protect your skin from the irritating sap. Rooting hormone can improve the success rate of stem cuttings. Provide bright, indirect light during the rooting process. Avoid overwatering, as this can lead to rot. Propagation is best done during the growing season (spring and summer).
Last updated: April 26, 2026 — Plant care data reviewed and verified by our editorial team.