Black-Eyed Susan vs Foxtail Lily 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.
Foxtail Lily
Eremurus spp.
Foxtail Lilies are striking perennial plants known for their tall, dense flower spikes that can reach impressive heights. They emerge from a central rosette of basal leaves and produce a towering inflorescence covered in hundreds of small, star-shaped flowers. These plants are primarily outdoor specimens, thriving in sunny gardens. People grow them for their dramatic vertical presence and the vibrant colors they bring to the landscape. They are not naturally suited for indoor environments due to their high light requirements and dormancy needs.
Quick Plant Comparison
| Feature | Black-Eyed Susan | Foxtail Lily |
|---|---|---|
| Light | Full sun (at least 6-8 hours of direct sunlight daily) | Full sun (at least 6-8 hours of direct sunlight daily) |
| Watering | Outdoors: Every 3-7 days depending on weather. Indoors (not recommended): Possibly more frequent, but monitor soil moisture carefully. | Once or twice a week during the growing season, less frequently during dormancy. |
| Humidity | 30-50% | 30-50% |
| Temperature | 18-27°C | 10-25°C |
| Care Level | Expert | Expert |
| Growth Rate | Moderate | Moderate |
| Max Height | Outdoors: 30-90 cm. Indoors (unlikely): Significantly smaller, if it survives. | Not applicable indoors; outdoors: 1-3 meters |
| Pet Safety | ❌ Toxic To Pets | ❌ Toxic To Pets |
| Soil | Well-draining soil, such as a mix of potting soil, perlite, and sand. | Well-draining, sandy loam soil with added compost. |
| Beginner Friendly | ❌ No | ❌ No |
| Weekly Maintenance | 5-10 minutes weekly (deadheading) | 30 minutes weekly during growing season. |
🔬 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. |
Foxtail Lily
| Scientific Name | Eremurus spp. |
|---|---|
| Family | Asphodelaceae |
| Native To | Central and Western Asia |
| Also Known As | Foxtail Lily, Desert Candle, King's Spear |
| Leaves | The leaves are long, strap-like, and basal, meaning they grow from the base of the plant. They are typically a bluish-green color and have a smooth texture. The leaves die back after flowering. |
| Flowers | Foxtail Lilies rarely, if ever, flower indoors. Outdoors, they produce tall, dense spikes of small, star-shaped flowers in shades of white, yellow, orange, pink, and red. The flowering period is typically in late spring or early summer. |
📏 Size & Growth — Plant Comparison
Black-Eyed Susan
Foxtail Lily
🌱 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.
Foxtail Lily
Methods: Division, Seed
Difficulty: Moderate
Tips: Divide established clumps in late summer or early fall after flowering. Sow seeds in fall for germination in spring.
✨ 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
Foxtail Lily
The Foxtail Lily stands out due to its towering flower spikes, which can reach several feet in height. These spikes are densely packed with hundreds of small flowers, creating a dramatic and eye-catching display. The plant's unique root structure, resembling an octopus, also distinguishes it from other bulbous plants.
- ✓ Adds dramatic vertical interest to the garden.
- ✓ Attracts pollinators such as bees and butterflies.
- ✓ Provides a unique and eye-catching focal point.
- ✓ Offers a sense of accomplishment for experienced gardeners.
- ✓ Creates a vibrant and colorful display in the landscape.
- ⚠️ Toxic to pets
📅 Maintenance Schedule — Plant Care Comparison
Black-Eyed Susan
Foxtail Lily
🌞 Light Requirements
Black-Eyed Susan
Full sun (at least 6-8 hours of direct sunlight daily)
Low light tolerant: ❌ No
Foxtail Lily
Full sun (at least 6-8 hours of direct sunlight daily)
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.
Foxtail Lily
Water deeply when the top inch of soil feels dry. Avoid overwatering, especially during dormancy, as this can lead to root rot. Ensure excellent drainage.
🌡️ Temperature & Humidity
Black-Eyed Susan
Temperature: 18-27°C
Humidity: 30-50%
Foxtail Lily
Temperature: 10-25°C
Humidity: 30-50%
🤔 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.
Foxtail Lily
Eremurus spp.Experienced gardeners seeking a dramatic and vertical element in their sunny garden.
✅ Choose This Plant If...
- You want a dramatic vertical accent in your garden.
- You have a sunny garden with well-draining soil.
- You want to attract pollinators to your garden.
- You appreciate unique and unusual plants.
- You are an experienced gardener looking for a rewarding challenge.
❌ Skip This Plant If...
- You have limited sunlight in your garden.
- You are looking for an easy-to-grow indoor plant.
- You have pets that might ingest the plant.
- You live in a very humid climate with poorly draining soil.
🎯 Quick Verdict
⚡ Key Differences Between These Plants
Black-Eyed Susan has moderate growth, while Foxtail Lily grows 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.
Foxtail Lily Care Tips
Foxtail Lilies are not suitable for indoor growing due to their high light requirements and dormancy needs. They require full sun, well-draining soil, and a period of winter dormancy. Indoor attempts will likely result in weak growth and failure to flower.
- Plant the crown with the roots spread out like an octopus.
- Ensure excellent drainage to prevent root rot.
- Provide support for tall flower spikes to prevent them from bending or breaking.
- Protect from slugs and snails, especially when young.
- Allow foliage to die back naturally in the fall to replenish the bulb's energy reserves.
⚠️ Common Problems & Solutions — Plant Care Comparison
Black-Eyed Susan
Foxtail Lily
❓ 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.
Foxtail Lily
What are the light requirements for Foxtail Lily?
Foxtail Lilies require at least six to eight hours of direct sunlight per day to thrive and produce their impressive flower spikes. A south-facing location is ideal, ensuring they receive ample sunlight throughout the growing season. Insufficient sunlight can result in weak stems, reduced flowering, and overall poor plant health.
How do I care for Foxtail Lily?
Foxtail Lilies require well-drained soil and a sunny location to thrive. Plant the rhizomes (thickened roots) in the fall, burying them about 4-6 inches deep, with the crown facing upwards. Ensure the soil is amended with organic matter to improve drainage. Water thoroughly after planting and then sparingly until spring growth begins.
How do I propagate Foxtail Lily?
Foxtail Lilies are typically propagated by division of the rhizomes in the fall. Carefully dig up the plant and separate the rhizomes, ensuring each division has at least one growth point. Replant the divisions in well-drained soil.
Last updated: May 9, 2026 — Plant care data reviewed and verified by our editorial team.