Black-Eyed Susan vs Mum 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.
Mum
Chrysanthemum × morifolium
Chrysanthemum × morifolium, commonly known as mums, are popular flowering plants cultivated for their vibrant and diverse flower colors and forms. They are herbaceous perennials, typically grown as annuals in many climates due to their sensitivity to frost. Mums are characterized by their bushy growth habit and composite flower heads, which come in various shapes like daisy-like, pompon, and spider. While primarily outdoor plants, they are often brought indoors for short periods to enjoy their blooms, but they require specific conditions to thrive indoors long-term. People grow them for ornamental purposes, adding color to gardens and homes, and for cut flowers.
Quick Plant Comparison
| Feature | Black-Eyed Susan | Mum |
|---|---|---|
| Light | Full sun (at least 6-8 hours of direct sunlight daily) | Full sun (at least 6 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. | Every 2-3 days outdoors in warm weather; every 5-7 days indoors, depending on light and temperature. |
| Humidity | 30-50% | 40-60% |
| Temperature | 18-27°C | 15-24°C |
| Care Level | Expert | Expert |
| Growth Rate | Moderate | Moderate |
| Max Height | Outdoors: 30-90 cm. Indoors (unlikely): Significantly smaller, if it survives. | 0.3-1 meter (indoors often smaller) |
| Pet Safety | ❌ Toxic To Pets | ❌ Toxic To Pets |
| Soil | Well-draining soil, such as a mix of potting soil, perlite, and sand. | Well-draining potting mix rich in organic matter. |
| Beginner Friendly | ❌ No | ❌ No |
| Weekly Maintenance | 5-10 minutes weekly (deadheading) | 15-30 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. |
Mum
| Scientific Name | Chrysanthemum × morifolium |
|---|---|
| Family | Asteraceae |
| Native To | China |
| Also Known As | Florist's Chrysanthemum, Garden Mum |
| Leaves | Leaves are typically lobed or toothed, medium green in color, and have a slightly hairy texture. Leaf size varies depending on the cultivar. |
| Flowers | Mums flower readily outdoors in the fall. Indoor flowering is possible with sufficient light and cool temperatures. Flowers come in a wide range of colors (white, yellow, orange, red, purple, pink) and forms (daisy-like, pompon, spider, etc.). |
📏 Size & Growth — Plant Comparison
Black-Eyed Susan
Mum
🌱 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.
Mum
Methods: Stem cuttings, Division, Seed
Difficulty: Moderate
Tips: Take stem cuttings in spring or early summer. Use rooting hormone and keep the cuttings in a humid environment. Division is best done in spring or fall.
✨ 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
Mum
Chrysanthemums are known for their diverse flower shapes and colors, blooming in the fall when many other plants are fading. They are photoperiodic, meaning their flowering is triggered by shorter day lengths.
- ✓ Adds vibrant color to gardens and homes
- ✓ Provides cut flowers for arrangements
- ✓ Can improve mood with its bright blooms
- ✓ Attracts pollinators to the garden
- ✓ Offers a sense of accomplishment for successful cultivation
- ⚠️ Toxic to pets
📅 Maintenance Schedule — Plant Care Comparison
Black-Eyed Susan
Mum
🌞 Light Requirements
Black-Eyed Susan
Full sun (at least 6-8 hours of direct sunlight daily)
Low light tolerant: ❌ No
Mum
Full sun (at least 6 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.
Mum
Water thoroughly when the top inch of soil feels dry. Avoid overwatering, which can lead to root rot. Ensure good drainage. Indoors, check soil moisture regularly as potted plants dry out faster. Signs of underwatering include wilting leaves; overwatering shows as yellowing leaves and soggy soil.
🌡️ Temperature & Humidity
Black-Eyed Susan
Temperature: 18-27°C
Humidity: 30-50%
Mum
Temperature: 15-24°C
Humidity: 40-60%
🤔 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.
Mum
Chrysanthemum × morifoliumGardeners looking to add vibrant fall color to their outdoor spaces, or those willing to provide very specific conditions for short-term indoor enjoyment.
✅ Choose This Plant If...
- You want vibrant fall colors in your garden.
- You are looking for a plant with diverse flower forms and colors.
- You are willing to provide the specific light and temperature conditions required for indoor blooming.
- You enjoy the challenge of caring for a plant that requires attentive maintenance.
- You want a plant that can be used for cut flowers.
❌ Skip This Plant If...
- You have pets that might ingest the plant.
- You cannot provide at least 6 hours of direct sunlight daily.
- You are looking for a low-maintenance indoor plant.
🎯 Quick Verdict
⚡ Key Differences Between These Plants
Black-Eyed Susan needs full sun (at least 6-8 hours of direct sunlight daily), while Mum prefers full sun (at least 6 hours of direct sunlight daily).
💡 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.
Mum Care Tips
Mums are primarily outdoor plants and require significant sunlight to thrive. Indoor care is challenging due to the need for bright light and cool temperatures. They are often treated as annuals indoors. Maintaining proper watering and humidity is crucial to prevent problems.
- Pinch back stems regularly until mid-summer to encourage bushier growth.
- Provide excellent drainage to prevent root rot.
- Water deeply but infrequently, allowing the soil to dry slightly between waterings.
- Fertilize regularly during the growing season with a balanced fertilizer.
- Monitor for pests and diseases and treat promptly.
⚠️ Common Problems & Solutions — Plant Care Comparison
Black-Eyed Susan
Mum
❓ 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.
Mum
What are the light requirements for Mum?
Mums thrive in bright, indirect light. They need at least 6 hours of sunlight per day to produce abundant blooms. An east- or west-facing window is ideal, providing ample light without the harshness of direct sunlight. Insufficient light can lead to leggy growth and reduced flowering.
How do I care for Mum?
To care for your Mum, provide bright, indirect light, ideally near an east- or west-facing window. Water thoroughly when the top inch of soil feels dry to the touch, ensuring good drainage to prevent root rot. Fertilize every two weeks during the growing season (spring and summer) with a balanced liquid fertilizer, reducing frequency in the fall.
How do I propagate Mum?
Mums can be propagated through division, stem cuttings, or occasionally from keiki.
Last updated: May 14, 2026 — Plant care data reviewed and verified by our editorial team.