Crown of Thorns vs Rain Lily Plant Comparison
Compare these two plants side by side — care needs, key differences, and which is right for your home.
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.
Rain Lily
Zephyranthes spp.
Rain Lilies are small, bulbous perennials known for their delightful, trumpet-shaped flowers that often appear after rainfall, hence the name. They typically grow to a height of 15-30 cm. The foliage consists of slender, grass-like leaves. While they can be grown indoors, they thrive outdoors in well-draining soil and plenty of sunlight. People grow them for their charming blooms, ease of care (outdoors), and ability to naturalize in suitable climates. They are popular in rock gardens, borders, and containers.
Quick Plant Comparison
| Feature | Crown of Thorns | Rain Lily |
|---|---|---|
| Light | Requires at least 4-6 hours of direct sunlight daily. Insufficient light will result in leggy growth and reduced flowering. | Full sun to partial shade. Requires at least 6 hours of direct sunlight daily for optimal flowering. |
| Watering | Every 2-3 weeks, depending on environmental conditions and pot size. | Every 7-10 days during the growing season, less frequently during dormancy. |
| Humidity | 30-50% | 40-60% |
| Temperature | 18-27°C | 18-27°C |
| Care Level | Moderate | Expert |
| Growth Rate | Slow | Moderate |
| Max Height | 0.3-0.6 meters (indoors) | 15-30 cm |
| Pet Safety | ❌ Toxic To Pets | ❌ Toxic To Pets |
| Soil | Well-draining succulent or cactus mix | Well-draining soil mix, such as a sandy loam or a mix of potting soil, perlite, and sand. |
| Beginner Friendly | With Caution | ❌ No |
| Weekly Maintenance | 10 minutes weekly | 5 minutes weekly (outdoors) |
🔬 Botanical Information — Comparing These Plants
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. |
Rain Lily
| Scientific Name | Zephyranthes spp. |
|---|---|
| Family | Amaryllidaceae |
| Native To | Americas, from the United States to Argentina |
| Also Known As | Rain Lily, Fairy Lily, Zephyr Lily |
| Leaves | The leaves are slender, linear, and grass-like, typically 15-30 cm long and 0.5-1 cm wide. They are usually a medium green color and have a smooth texture. |
| Flowers | Rain Lilies can flower indoors, but it is less common and less prolific than outdoors. The flowers are trumpet-shaped, with six petals, and come in various colors, including white, pink, yellow, and red. They typically last for a few days. |
📏 Size & Growth — Plant Comparison
Crown of Thorns
Rain Lily
🌱 Propagation — Comparing Plant Growth
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.
Rain Lily
Methods: Division, Seed
Difficulty: Easy
Tips: Divide bulbs after flowering or collect and sow seeds in spring. For division, gently separate offsets from the main bulb and replant them in well-draining soil. For seeds, sow them in a seed-starting mix and keep them moist until germination.
✨ Benefits & Features — Comparing Plant Value
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
Rain Lily
The most unique characteristic is their tendency to bloom after rainfall, a phenomenon that is triggered by the sudden increase in moisture. This makes them a delightful surprise in the garden. The flowers are also relatively short-lived, adding to their ephemeral charm.
- ✓ Attracts pollinators to the garden.
- ✓ Adds a splash of color to the landscape.
- ✓ Low maintenance once established.
- ✓ Can be grown in containers or in the ground.
- ✓ Provides a natural, informal aesthetic.
- ⚠️ Toxic to pets
📅 Maintenance Schedule — Plant Care Comparison
Crown of Thorns
Rain Lily
🌞 Light Requirements
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
Rain Lily
Full sun to partial shade. Requires at least 6 hours of direct sunlight daily for optimal flowering.
Low light tolerant: ❌ No
💧 Watering Needs
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.
Rain Lily
Water thoroughly when the top inch of soil feels dry. Avoid overwatering, which can lead to bulb rot. Reduce watering during dormancy. Signs of overwatering include yellowing leaves and a mushy bulb. Underwatering results in dry, brittle leaves and stunted growth.
🌡️ Temperature & Humidity
Crown of Thorns
Temperature: 18-27°C
Humidity: 30-50%
Rain Lily
Temperature: 18-27°C
Humidity: 40-60%
🤔 Which Plant Is Right For You?
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.
Rain Lily
Zephyranthes spp.Gardeners in warm climates looking for low-maintenance, flowering plants for borders, rock gardens, or containers.
✅ Choose This Plant If...
- You live in a warm climate with mild winters.
- You want a low-maintenance plant for your garden.
- You enjoy flowers that bloom after rainfall.
- You have a sunny garden or rock garden.
- You want to attract pollinators to your garden.
❌ Skip This Plant If...
- You live in a cold climate with harsh winters.
- You have pets that might ingest the plant.
- You don't have a sunny location.
- You want a plant that flowers reliably indoors.
🎯 Quick Verdict
⚡ Key Differences Between These Plants
Crown of Thorns is rated Moderate care level, while Rain Lily is Expert.
Crown of Thorns has slow growth, while Rain Lily grows moderate.
💡 Pro Tips For Comparing These Plants
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.
Rain Lily Care Tips
Rain Lilies are best suited for outdoor cultivation. Indoor growing is challenging due to high light requirements. They need well-draining soil, regular watering during the growing season, and protection from frost. Indoor plants rarely flower as prolifically as outdoor ones.
- Plant bulbs in well-draining soil to prevent rot.
- Provide full sun for optimal flowering.
- Water deeply but infrequently, allowing the soil to dry out between waterings.
- Fertilize during the growing season to encourage blooms.
- Protect from frost in colder climates.
⚠️ Common Problems & Solutions — Plant Care Comparison
Crown of Thorns
Rain Lily
❓ Frequently Asked Questions — Comparing These Plants
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).
Rain Lily
What are the light requirements for Rain Lily?
Rain Lilies thrive in bright, indirect light. Indoors, place them near an east- or west-facing window where they can receive several hours of sunlight daily. If you notice the leaves becoming pale or leggy, it indicates insufficient light. Conversely, scorching can occur if they are exposed to intense, direct sunlight, especially during the hottest part of the day. Rotate the pot regularly to ensure even light exposure on all sides of the plant. Supplement with grow lights if natural light is limited, especially during winter months.
How do I care for Rain Lily?
Rain Lilies are relatively easy to care for, requiring well-draining soil and bright, indirect light. Water thoroughly when the top inch of soil feels dry, and allow the soil to dry out slightly between waterings. Fertilize with a balanced liquid fertilizer during the growing season (spring and summer) to encourage blooming. Repot every 2-3 years or when the bulbs become overcrowded. Protect from frost in colder climates by bringing potted plants indoors or mulching garden beds. Deadhead spent flowers to promote further blooming. Provide adequate drainage to prevent root rot, and ensure good air circulation. Avoid overwatering, especially during dormancy.
How do I propagate Rain Lily?
Rain Lilies can be easily propagated by division. When repotting, gently separate the bulbs and plant them in individual pots. Offsets, or small bulbs that form around the base of the main bulb, can also be removed and planted. Stem cuttings are not applicable for Rain Lilies as they grow from bulbs. Keikis are not applicable for Rain Lilies. Ensure each division has healthy roots. Plant in well-draining soil and water thoroughly. Keep the soil consistently moist until new growth appears.
Last updated: April 20, 2026 — Plant care data reviewed and verified by our editorial team.