Ornamental Onion vs Peace Lily Plant Comparison
Compare these two plants side by side — care needs, key differences, and which is right for your home.
Ornamental Onion
Allium spp.
Ornamental onions are bulbous perennials grown for their showy, spherical flower heads in shades of purple, pink, white, and yellow. The foliage is typically grass-like or strap-shaped and often dies back before or during flowering. They range in size from a few inches to several feet tall, depending on the species. These plants are primarily grown outdoors in gardens and borders for their architectural interest and pollinator-attracting blooms. While some smaller varieties can be grown in containers, they are generally not suited for indoor cultivation due to their high light requirements and dormancy needs.
Peace Lily
Spathiphyllum wallisii
The Peace Lily is a popular evergreen herbaceous perennial known for its elegant white 'flowers' (actually modified leaves called spathes) and glossy, dark green leaves. It's primarily grown as an indoor plant for its air-purifying qualities and attractive appearance. It features a clumping growth habit, arising from rhizomes. While it can be grown outdoors in very warm, humid climates, it's most commonly found as a houseplant due to its adaptability to indoor conditions and tolerance of lower light levels. The plant's beauty and ease of care make it a favorite for homes and offices.
Quick Plant Comparison
| Feature | Ornamental Onion | Peace Lily |
|---|---|---|
| Light | Full sun (at least 6-8 hours of direct sunlight daily) | Bright, indirect light. Avoid direct sunlight, which can scorch the leaves. |
| Watering | Every 1-2 weeks during the growing season, less frequently during dormancy. | Every 7-10 days, depending on environmental conditions |
| Humidity | 30-50% | 50-70% |
| Temperature | 10-24°C | 18-24°C |
| Care Level | Expert | Easy |
| Growth Rate | Moderate | Moderate |
| Max Height | 0.15-1.5 meters (depending on species) | 30-60 cm |
| Pet Safety | ❌ Toxic To Pets | ❌ Toxic To Pets |
| Soil | Well-draining soil, such as a mix of garden soil, sand, and compost. | Well-draining potting mix, such as a mix of peat moss, perlite, and vermiculite |
| Beginner Friendly | ❌ No | ✅ Yes |
| Weekly Maintenance | 5 minutes weekly during the growing season. | 5-10 minutes weekly |
🔬 Botanical Information — Comparing These Plants
Ornamental Onion
| Scientific Name | Allium spp. |
|---|---|
| Family | Amaryllidaceae |
| Native To | Various species originate from different regions across the Northern Hemisphere, including Europe, Asia, and North America. |
| Also Known As | Ornamental Onion, Flowering Onion, Allium |
| Leaves | The leaves are typically grass-like or strap-shaped, ranging in color from green to bluish-green. They emerge from the base of the plant and often die back before or during flowering. The leaves have a characteristic onion-like scent when crushed. |
| Flowers | Ornamental onions produce showy, spherical flower heads composed of numerous small, star-shaped flowers. The flowers come in a variety of colors, including purple, pink, white, and yellow. They bloom in late spring or early summer and attract pollinators. |
Peace Lily
| Scientific Name | Spathiphyllum wallisii |
|---|---|
| Family | Araceae |
| Native To | Tropical rainforests of Central and South America |
| Also Known As | Peace Lily, White Sails, Spathe Flower |
| Leaves | The leaves are glossy, dark green, and lance-shaped, with prominent veins. They can grow up to 25 cm long and have a slightly wavy texture. |
| Flowers | Peace Lilies can flower indoors under the right conditions, typically in spring or early summer. The 'flower' is a white spathe that surrounds a central spadix covered in small, true flowers. The spathe will eventually turn green as it ages. |
📏 Size & Growth — Plant Comparison
Ornamental Onion
Peace Lily
🌱 Propagation — Comparing Plant Growth
Ornamental Onion
Methods: Bulb offsets, Seed
Difficulty: Moderate
Tips: Divide bulb offsets in the fall after the foliage has died back. Sow seeds in the spring or fall.
Peace Lily
Methods: Division
Difficulty: Easy
Tips: Divide the plant at the root ball, ensuring each division has healthy roots and leaves. Repot immediately.
✨ Benefits & Features — Comparing Plant Value
Ornamental Onion
Ornamental onions are known for their striking, spherical flower heads that come in a variety of colors and sizes. They are also deer-resistant and attract pollinators, making them a valuable addition to any garden. Their foliage often dies back before flowering, adding to their unique appeal.
- ✓ Attracts pollinators to the garden
- ✓ Deer-resistant, protecting other plants
- ✓ Adds unique architectural interest
- ✓ Low-maintenance once established
- ✓ Provides long-lasting blooms
- ⚠️ Toxic to pets
Peace Lily
The Peace Lily is known for its elegant white spathe, which resembles a flower but is actually a modified leaf. It's also a popular choice for its air-purifying qualities, removing toxins like formaldehyde and benzene from the air.
- ✓ Improved indoor air quality
- ✓ Elegant and calming aesthetic
- ✓ Relatively low-maintenance
- ✓ Adds a touch of greenery to any space
- ✓ Can help to reduce stress levels
- 🌬️ NASA-verified air purifier
- ⚠️ Toxic to pets
📅 Maintenance Schedule — Plant Care Comparison
Ornamental Onion
Peace Lily
🌞 Light Requirements
Ornamental Onion
Full sun (at least 6-8 hours of direct sunlight daily)
Low light tolerant: ❌ No
Peace Lily
Bright, indirect light. Avoid direct sunlight, which can scorch the leaves.
Low light tolerant: ✅ Yes
💧 Watering Needs
Ornamental Onion
Water thoroughly when the top inch of soil is dry during the growing season. Reduce watering after flowering and during dormancy. Overwatering can lead to bulb rot, especially in poorly draining soil. Underwatering can cause stunted growth and poor flowering.
Peace Lily
Water thoroughly when the top inch of soil feels dry to the touch. Allow excess water to drain away. Overwatering can lead to root rot, indicated by yellowing leaves and a musty smell. Underwatering will cause the leaves to droop dramatically.
🌡️ Temperature & Humidity
Ornamental Onion
Temperature: 10-24°C
Humidity: 30-50%
Peace Lily
Temperature: 18-24°C
Humidity: 50-70%
🤔 Which Plant Is Right For You?
Ornamental Onion
Allium spp.Gardeners looking for striking, low-maintenance plants to add architectural interest and attract pollinators to their outdoor spaces.
✅ Choose This Plant If...
- You want a deer-resistant plant for your garden.
- You want to attract pollinators like bees and butterflies to your yard.
- You appreciate unique, architectural flower shapes.
- You are looking for a low-maintenance perennial.
- You have a sunny garden space with well-draining soil.
❌ Skip This Plant If...
- You have pets that may ingest the plant.
- You lack a sunny outdoor space.
- You are looking for a plant that thrives indoors.
Peace Lily
Spathiphyllum wallisiiIndividuals looking for an elegant, low-maintenance houseplant that can improve indoor air quality.
✅ Choose This Plant If...
- It's a beautiful and elegant plant that adds a touch of sophistication to any room.
- It's relatively low-maintenance and easy to care for, making it a good choice for beginners.
- It's known for its air-purifying qualities, helping to improve indoor air quality.
- It tolerates low light conditions, making it suitable for rooms with less natural light.
- It's a great way to add a touch of greenery to your home or office.
❌ Skip This Plant If...
- It's toxic to pets if ingested.
- It can be sensitive to fluoride in tap water.
- It requires consistent watering and can be prone to root rot if overwatered.
🎯 Quick Verdict
⚡ Key Differences Between These Plants
Ornamental Onion is rated Expert care level, while Peace Lily is Easy.
💡 Pro Tips For Comparing These Plants
Ornamental Onion Care Tips
Ornamental onions are primarily outdoor plants that require full sun and well-draining soil. They are not well-suited for indoor cultivation due to their high light requirements and dormancy needs. Indoor growing is challenging due to providing sufficient light and managing the dormancy period.
- Plant bulbs in well-draining soil to prevent rot.
- Provide full sun for optimal flowering.
- Allow foliage to die back naturally after flowering.
- Divide bulbs every few years to prevent overcrowding.
- Avoid overwatering, especially during dormancy.
Peace Lily Care Tips
Peace Lilies are relatively easy to care for indoors. They thrive in bright, indirect light and require regular watering. Avoid direct sunlight and overwatering. They are sensitive to fluoride in tap water, so use filtered or distilled water if possible.
- Use filtered or distilled water to avoid fluoride toxicity.
- Wipe the leaves regularly with a damp cloth to remove dust and improve photosynthesis.
- Provide adequate humidity by misting the plant or using a humidifier.
- Avoid placing the plant near drafts or heating vents.
- Repot the plant in fresh soil every 1-2 years to provide nutrients and improve drainage.
⚠️ Common Problems & Solutions — Plant Care Comparison
Ornamental Onion
Peace Lily
❓ Frequently Asked Questions — Comparing These Plants
Ornamental Onion
What are the light requirements for Ornamental Onion?
Ornamental Onions require at least 6-8 hours of direct sunlight per day to thrive and produce abundant blooms. Insufficient light can result in weak stems, fewer flowers, and overall poor growth. When grown indoors, place them near a south-facing window where they can receive maximum sunlight exposure. If natural light is limited, supplement with grow lights to ensure adequate illumination. Rotate the plant regularly to ensure even light distribution on all sides. Monitor the plant for signs of light stress, such as pale leaves or elongated stems, and adjust its position accordingly.
How do I care for Ornamental Onion?
Ornamental Onions thrive in well-draining soil and full sun. Plant bulbs in the fall for spring blooms, or in early spring for summer blooms. Water thoroughly after planting and then moderately throughout the growing season, allowing the soil to dry slightly between waterings. Fertilize in early spring with a balanced fertilizer to encourage strong growth and abundant blooms. Deadhead spent flowers to prevent seed production and encourage further blooming. In colder climates, provide winter protection by mulching around the base of the plant. Divide clumps every few years to prevent overcrowding and maintain vigor. With proper care, your Ornamental Onions will provide years of stunning floral displays. Maintain good airflow to prevent fungal diseases.
How do I propagate Ornamental Onion?
Ornamental Onions can be propagated by division, stem cuttings, or keiki (small plantlets that grow on the flower stalk).
Peace Lily
What are the light requirements for Peace Lily?
Peace Lilies thrive in medium to low indirect light. Avoid direct sunlight, which can scorch their leaves. An east-facing window is ideal, providing gentle morning light. If placed near a south or west-facing window, use a sheer curtain to filter the light. Too little light can result in fewer flowers and slower growth. Observe your plant for signs of inadequate light, such as leggy growth or a lack of blooms. You can also use artificial light, such as fluorescent or LED grow lights, if natural light is limited. Rotate your plant occasionally to ensure even light exposure on all sides. Remember that darker-leaved varieties can tolerate slightly lower light levels than lighter-leaved ones.
How do I care for Peace Lily?
Peace Lilies thrive in indirect light; avoid direct sunlight to prevent leaf burn. Water thoroughly when the top inch of soil is dry, allowing excess water to drain. They prefer high humidity, so mist regularly or place near a humidifier. Fertilize sparingly during the growing season (spring/summer) with a balanced liquid fertilizer diluted to half strength. Repot every 1-2 years as needed, using a well-draining potting mix. Keep temperatures between 65-80°F (18-27°C). Prune away any yellow or brown leaves to maintain appearance. Protect from drafts and sudden temperature changes. Monitor for pests like spider mites or mealybugs and treat accordingly. Provide adequate air circulation to prevent fungal diseases. With proper care, your Peace Lily will reward you with beautiful foliage and elegant blooms.
How do I propagate Peace Lily?
Peace Lilies are commonly propagated by division. Carefully remove the plant from its pot and gently separate the root ball into smaller clumps, ensuring each clump has healthy roots and leaves. Plant each division into its own pot with fresh potting mix. Keep the soil consistently moist and provide bright, indirect light. Propagation by stem cuttings is less common but can be attempted by taking a cutting with a leaf and a node and placing it in water until roots develop before planting in soil. Air layering is another option, but it’s more complex and not typically used for Peace Lilies. Division is the most reliable method.
Last updated: April 24, 2026 — Plant care data reviewed and verified by our editorial team.