Busy Lizzie vs Crown of Thorns Plant Comparison
Compare these two plants side by side — care needs, key differences, and which is right for your home.
Busy Lizzie
Impatiens walleriana
Impatiens walleriana, commonly known as Busy Lizzie, is a popular flowering plant prized for its vibrant and abundant blooms. It is a herbaceous perennial, typically grown as an annual in temperate climates. Reaching heights of 15-60 cm, it features succulent stems and oval, toothed leaves. The flowers come in a wide range of colors, including red, pink, orange, purple, and white. Busy Lizzies are primarily grown outdoors in gardens, containers, and hanging baskets for their continuous flowering throughout the growing season. While they can be grown indoors, maintaining consistent humidity and light can be challenging.
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 | Busy Lizzie | Crown of Thorns |
|---|---|---|
| Light | Bright, indirect light. Avoid direct sunlight, which can scorch the leaves. | Requires at least 4-6 hours of direct sunlight daily. Insufficient light will result in leggy growth and reduced flowering. |
| Watering | Every 2-4 days, depending on environmental conditions and pot size. | Every 2-3 weeks, depending on environmental conditions and pot size. |
| Humidity | 40-60% | 30-50% |
| Temperature | 18-24°C | 18-27°C |
| Care Level | Moderate | Moderate |
| Growth Rate | Moderate | Slow |
| Max Height | 20-40 cm (indoors) | 0.3-0.6 meters (indoors) |
| Pet Safety | ❌ Toxic To Pets | ❌ Toxic To Pets |
| Soil | Well-draining potting mix, such as a mix of peat moss, perlite, and vermiculite. | Well-draining succulent or cactus mix |
| Beginner Friendly | With Caution | With Caution |
| Weekly Maintenance | 10 minutes weekly | 10 minutes weekly |
🔬 Botanical Information — Comparing These Plants
Busy Lizzie
| Scientific Name | Impatiens walleriana |
|---|---|
| Family | Balsaminaceae |
| Native To | Eastern Africa |
| Also Known As | Busy Lizzie, Balsam, Garden Balsam, Sultana |
| Leaves | Oval-shaped leaves with toothed edges. They are typically medium green and have a slightly succulent texture. The leaves are arranged alternately along the stems. |
| Flowers | Flowers readily indoors given enough light. The flowers are single or double, and come in a wide range of colors including red, pink, orange, purple, white, and bi-colors. They have a spurred shape and are about 2-5 cm in diameter. |
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
Busy Lizzie
Crown of Thorns
🌱 Propagation — Comparing Plant Growth
Busy Lizzie
Methods: Stem cuttings, Seed
Difficulty: Easy
Tips: Take 5-7 cm stem cuttings with several leaves. Remove the lower leaves and place the cutting in water or directly into moist potting mix. Keep the cutting in a warm, humid environment until roots develop (usually within 2-3 weeks).
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
Busy Lizzie
The explosive seed dispersal mechanism is unique. The wide variety of flower colors available makes it a versatile choice for gardens and containers.
- ✓ Adds vibrant color to shady areas
- ✓ Provides a long-lasting display of flowers
- ✓ Attracts pollinators to the garden
- ✓ Relatively easy to propagate
- ✓ Can be grown in containers or hanging baskets
- ⚠️ 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
Busy Lizzie
Crown of Thorns
🌞 Light Requirements
Busy Lizzie
Bright, indirect light. Avoid direct sunlight, which can scorch the leaves.
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
Busy Lizzie
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, while overwatering can cause yellowing leaves and stem rot.
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
Busy Lizzie
Temperature: 18-24°C
Humidity: 40-60%
Crown of Thorns
Temperature: 18-27°C
Humidity: 30-50%
🤔 Which Plant Is Right For You?
Busy Lizzie
Impatiens wallerianaGardeners who want a vibrant, continuously flowering plant for shady areas.
✅ Choose This Plant If...
- You want a plant that flowers continuously throughout the growing season.
- You need a plant that thrives in shady areas.
- You enjoy a wide variety of flower colors.
- You want a relatively easy-to-propagate plant.
- You want a plant that attracts pollinators like butterflies.
❌ Skip This Plant If...
- You have pets that may ingest the plant.
- You struggle with maintaining consistent watering schedules.
- You live in a very dry climate and cannot provide adequate humidity.
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
Busy Lizzie has moderate growth, while Crown of Thorns grows slow.
💡 Pro Tips For Comparing These Plants
Busy Lizzie Care Tips
Busy Lizzies require bright, indirect light and consistent moisture. They are susceptible to fungal diseases, especially in humid conditions. Indoor cultivation can be challenging due to the need for high humidity and consistent watering. Regular fertilization is needed during the growing season.
- Pinch back stems regularly to encourage bushier growth.
- Water deeply when the top inch of soil is dry.
- Fertilize every 2-4 weeks during the growing season.
- Provide good air circulation to prevent fungal diseases.
- Monitor for pests and treat promptly.
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
Busy Lizzie
Crown of Thorns
❓ Frequently Asked Questions — Comparing These Plants
Busy Lizzie
What are the light requirements for Busy Lizzie?
Busy Lizzies prefer partial shade, meaning they need protection from direct sunlight, especially during the hottest part of the day. Too much direct sun can scorch their leaves and inhibit flowering. An east-facing window or a location with filtered sunlight is ideal. If growing outdoors, choose a spot under a tree canopy or in a shaded area of a patio or balcony. Insufficient light can lead to leggy growth and reduced flowering. Rotate the plant regularly to ensure all sides receive adequate light. If natural light is limited, consider using grow lights to supplement their needs. Aim for 12-14 hours of light per day for optimal growth and blooming.
How do I care for Busy Lizzie?
Busy Lizzies thrive in partial shade with well-draining soil. Water regularly, keeping the soil consistently moist but not soggy. Fertilize every 2-4 weeks during the growing season with a balanced liquid fertilizer, or one specifically formulated for flowering plants, to encourage abundant blooms. Maintain a temperature between 65-75°F (18-24°C) and a humidity level of 50-60%. Prune regularly to remove spent flowers and maintain a compact shape. Repot in spring if the plant becomes root-bound. Protect from frost and direct sunlight, as these can damage the leaves and flowers. Monitor for pests like aphids and spider mites, and treat promptly with insecticidal soap. Rotate the plant occasionally to ensure even growth. Provide good air circulation to prevent fungal diseases.
How do I propagate Busy Lizzie?
Busy Lizzies are easily propagated through stem cuttings. Take a 3-4 inch cutting from a healthy stem, removing the lower leaves. Place the cutting in water or directly into moist potting mix. Keep the cutting in a warm, bright location, out of direct sunlight. Roots should develop in 2-3 weeks. Once roots have formed, transplant the cutting into a pot with well-draining soil. Division is possible, but less common. Carefully separate the root ball of a mature plant and pot each section individually. Keiki propagation does not apply to Busy Lizzie. Maintain high humidity during the rooting process by covering the cutting with a plastic bag or humidity dome.
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 29, 2026 — Plant care data reviewed and verified by our editorial team.