Black-Eyed Susan vs Carrot Fern Plant Comparison
Compare these two plants side by side — care needs, key differences, and which is right for your home.
Black-Eyed Susan
Rudbeckia hirta
Rudbeckia hirta, commonly known as Black-Eyed Susan, is a flowering plant typically grown as an annual or short-lived perennial. It features daisy-like flowers with bright yellow petals surrounding a dark brown or black central cone. The plant grows upright, reaching heights of 1 to 3 feet. It is primarily an outdoor plant, valued for its vibrant blooms and ability to attract pollinators to gardens. While technically possible to grow indoors, it requires very specific and intense lighting conditions to thrive and bloom, making it challenging.
Carrot Fern
Onychium japonicum
Onychium japonicum, commonly known as the Carrot Fern, is a delicate-looking fern with finely divided, lacy fronds resembling carrot leaves, hence the name. It is a terrestrial fern, naturally found in moist, shaded areas. While it can be grown indoors, it requires specific conditions to thrive. People grow it for its unique foliage texture and elegant appearance. It is not a particularly robust fern and needs consistent care to maintain its beauty. This fern adds a touch of elegance to any space with its intricate foliage.
Quick Plant Comparison
| Feature | Black-Eyed Susan | Carrot Fern |
|---|---|---|
| Light | Full sun (at least 6-8 hours of direct sunlight daily) | Bright, indirect light. Avoid direct sunlight, which can scorch the fronds. |
| Watering | Outdoors: Every 3-7 days depending on weather. Indoors (not recommended): Possibly more frequent, but monitor soil moisture carefully. | Every 3-5 days, depending on environmental conditions |
| Humidity | 30-50% | 60-80% |
| Temperature | 18-27°C | 18-24°C |
| Care Level | Expert | Moderate |
| Growth Rate | Moderate | Moderate |
| Max Height | Outdoors: 30-90 cm. Indoors (unlikely): Significantly smaller, if it survives. | 30-60 cm |
| Pet Safety | ❌ Toxic To Pets | ✅ Safe |
| Soil | Well-draining soil, such as a mix of potting soil, perlite, and sand. | Well-draining, moisture-retentive potting mix, such as a mix of peat moss, perlite, and vermiculite. |
| Beginner Friendly | ❌ No | With Caution |
| Weekly Maintenance | 5-10 minutes weekly (deadheading) | 15 minutes weekly |
🔬 Botanical Information — Comparing These Plants
Black-Eyed Susan
| Scientific Name | Rudbeckia hirta |
|---|---|
| Family | Asteraceae |
| Native To | Eastern and Central North America |
| Also Known As | Black-Eyed Susan, Brown-Eyed Susan, Gloriosa Daisy |
| Leaves | The leaves are lance-shaped, rough in texture, and medium green in color. They are typically 2-6 inches long and arranged alternately along the stem. |
| Flowers | Flowers are daisy-like with bright yellow petals surrounding a dark brown or black central cone. They bloom profusely throughout the summer and into the fall. |
Carrot Fern
| Scientific Name | Onychium japonicum |
|---|---|
| Family | Pteridaceae |
| Native To | East Asia (Japan, China, Korea) |
| Also Known As | Carrot Fern, Japanese Claw Fern, Claw Fern |
| Leaves | The leaves (fronds) are finely divided and lacy, resembling carrot leaves. They are typically light green in color and have a delicate texture. The fronds can grow up to 30 cm long and are arranged in an arching pattern. |
| Flowers | Carrot Ferns do not produce flowers indoors. They reproduce via spores. |
📏 Size & Growth — Plant Comparison
Black-Eyed Susan
Carrot Fern
🌱 Propagation — Comparing Plant Growth
Black-Eyed Susan
Methods: Seed, Division
Difficulty: Easy
Tips: For seeds, sow directly into the garden in spring or start indoors 6-8 weeks before the last frost. For division, divide clumps in early spring or fall.
Carrot Fern
Methods: Spores, Division
Difficulty: Moderate
Tips: Spores require a sterile environment and high humidity for germination. Division is best done in spring, separating the rhizomes carefully and planting them in fresh potting mix.
✨ Benefits & Features — Comparing Plant Value
Black-Eyed Susan
The dark central cone provides a striking contrast to the bright yellow petals. It's a popular choice for attracting pollinators and is relatively deer-resistant.
- ✓ Attracts pollinators
- ✓ Adds vibrant color to gardens
- ✓ Deer resistant
- ✓ Relatively low maintenance outdoors
- ✓ Native plant supports local ecosystems
- ⚠️ Toxic to pets
Carrot Fern
The Carrot Fern's unique, finely divided fronds distinguish it from other ferns. Its delicate appearance adds a touch of elegance to any indoor space. It requires specific care conditions to thrive, making it a rewarding challenge for experienced plant enthusiasts.
- ✓ Adds a touch of elegance to any space.
- ✓ Unique foliage texture provides visual interest.
- ✓ Can improve indoor humidity levels.
- ✓ Provides a calming and natural aesthetic.
- ✓ Can be a rewarding plant to care for.
- 🐾 Pet Safe
📅 Maintenance Schedule — Plant Care Comparison
Black-Eyed Susan
Carrot Fern
🌞 Light Requirements
Black-Eyed Susan
Full sun (at least 6-8 hours of direct sunlight daily)
Low light tolerant: ❌ No
Carrot Fern
Bright, indirect light. Avoid direct sunlight, which can scorch the fronds.
Low light tolerant: ❌ No
💧 Watering Needs
Black-Eyed Susan
Water thoroughly when the top inch of soil feels dry to the touch. Avoid overwatering, which can lead to root rot. Allow excess water to drain away. Signs of underwatering include wilting leaves; overwatering includes yellowing leaves and soggy soil.
Carrot Fern
Keep the soil consistently moist but not soggy. Water when the top inch of soil feels slightly dry. Overwatering can lead to root rot, while underwatering causes the fronds to dry and brown. Ensure good drainage.
🌡️ Temperature & Humidity
Black-Eyed Susan
Temperature: 18-27°C
Humidity: 30-50%
Carrot Fern
Temperature: 18-24°C
Humidity: 60-80%
🤔 Which Plant Is Right For You?
Black-Eyed Susan
Rudbeckia hirtaGardeners looking to add vibrant color and attract pollinators to their outdoor spaces.
✅ Choose This Plant If...
- You want to attract pollinators to your garden.
- You desire a long-blooming, cheerful flower.
- You need a deer-resistant plant.
- You want a low-maintenance outdoor plant once established.
- You want a native North American wildflower.
❌ Skip This Plant If...
- You have limited sunlight indoors.
- You have pets that might ingest the plant.
- You are looking for a low-maintenance INDOOR plant.
Carrot Fern
Onychium japonicumExperienced plant enthusiasts who can provide the necessary humidity and consistent care.
✅ Choose This Plant If...
- You appreciate delicate, lacy foliage.
- You can provide high humidity levels.
- You are experienced with caring for ferns.
- You want a unique and elegant houseplant.
- You have a location with bright, indirect light.
❌ Skip This Plant If...
- You struggle to maintain high humidity.
- You tend to overwater plants.
- You are a beginner plant owner.
- You have limited space.
- You want a low-maintenance plant.
🎯 Quick Verdict
⚡ Key Differences Between These Plants
Black-Eyed Susan is rated Expert care level, while Carrot Fern is Moderate.
💡 Pro Tips For Comparing These Plants
Black-Eyed Susan Care Tips
Black-Eyed Susans are primarily outdoor plants that require full sun and well-draining soil. Growing them indoors is extremely challenging due to their high light requirements. They are toxic to pets. Indoor survival is unlikely without specialized grow lights and careful monitoring.
- Provide full sun for optimal blooming.
- Ensure well-draining soil to prevent root rot.
- Deadhead spent flowers regularly.
- Water deeply but infrequently.
- Monitor for pests and diseases.
Carrot Fern Care Tips
Carrot Fern requires consistent moisture, high humidity, and bright, indirect light. It can be challenging to maintain the necessary humidity levels indoors, making it less suitable for beginners. Regular watering and occasional fertilization are essential for healthy growth. Avoid direct sunlight and drafts.
- Use distilled or rainwater to avoid mineral buildup in the soil.
- Mist the plant regularly to maintain high humidity.
- Provide good air circulation to prevent fungal diseases.
- Avoid placing the plant near drafts or heat sources.
- Monitor for pests regularly and treat promptly.
⚠️ Common Problems & Solutions — Plant Care Comparison
Black-Eyed Susan
Carrot Fern
❓ Frequently Asked Questions — Comparing These Plants
Black-Eyed Susan
What are the light requirements for Black-Eyed Susan?
Black-Eyed Susans are sun-loving plants and require at least 6 hours of direct sunlight each day to thrive. Insufficient light can lead to leggy growth, reduced blooming, and pale foliage. When grown indoors, place them near a south-facing window where they can receive ample sunlight. If natural light is limited, supplement with grow lights to ensure they get the light they need.
How do I care for Black-Eyed Susan?
Black-Eyed Susans thrive in full sun, requiring at least 6 hours of direct sunlight daily. Well-draining soil is crucial to prevent root rot; amend heavy clay soils with compost or sand. Water regularly, especially during dry periods, but avoid overwatering. Fertilize sparingly with a balanced fertilizer in the spring to encourage blooming. Deadhead spent flowers to promote continuous blooming throughout the season.
How do I propagate Black-Eyed Susan?
Black-Eyed Susans can be propagated through division or seeds.
Carrot Fern
What are the light requirements for Carrot Fern?
Carrot Fern requires bright, indirect light to thrive. Direct sunlight can scorch its delicate fronds, leading to browning and damage. An east-facing window is often ideal, providing gentle morning sun. A north-facing window can also work, but ensure the plant receives enough light throughout the day. If you place your Carrot Fern near a south or west-facing window, use sheer curtains to filter the sunlight. If the fronds start to look pale or leggy, it may indicate that the plant is not receiving enough light. Conversely, if the fronds turn brown or crispy, it may be getting too much direct light. Rotate the plant regularly to ensure even light exposure on all sides.
How do I care for Carrot Fern?
Carrot Fern thrives in bright, indirect light. Avoid direct sunlight, which can scorch the delicate fronds. Water thoroughly when the top inch of soil feels dry, but ensure the pot has good drainage to prevent root rot. Maintain high humidity levels by misting regularly, using a humidifier, or placing the pot on a pebble tray filled with water. The ideal temperature range is between 65-75°F (18-24°C). Feed with a diluted liquid fertilizer every 2-4 weeks during the growing season (spring and summer). Repot every 1-2 years into a slightly larger pot with well-draining potting mix. Prune away any dead or damaged fronds to encourage new growth. Regularly check for pests like spider mites or mealybugs and treat them promptly. Provide good air circulation to prevent fungal diseases.
How do I propagate Carrot Fern?
Carrot Fern can be propagated by division or spores. Division is the easier method. To divide, gently remove the plant from its pot and separate the rhizomes into smaller sections, ensuring each section has healthy roots and fronds. Plant each section in its own pot with well-draining potting mix. Keep the soil consistently moist and provide high humidity until new growth appears. Propagating from spores is more challenging and requires a sterile environment. Collect spores from mature fronds and sow them on a sterile potting mix. Cover with a clear plastic dome to maintain high humidity. Keep the soil moist and provide bright, indirect light. It can take several weeks or months for spores to germinate.
Last updated: April 19, 2026 — Plant care data reviewed and verified by our editorial team.