Lacy Tree Philodendron vs Nodding Onion Plant Comparison
Compare these two plants side by side — care needs, key differences, and which is right for your home.
Lacy Tree Philodendron
Thaumatophyllum bipinnatifidum
Thaumatophyllum bipinnatifidum, commonly known as the Lacy Tree Philodendron or Selloum, is a large, evergreen plant characterized by its deeply lobed, glossy green leaves. Despite its common name, it is not a true philodendron. It exhibits a shrub-like growth habit, developing a thick, trunk-like stem as it matures. While it can reach impressive sizes outdoors, indoor specimens remain more manageable. It's popular for its bold, tropical appearance and relatively easy care, making it a statement piece in homes and offices.
Nodding Onion
Allium cernuum
Nodding Onion is a perennial herb native to North America. It features slender, grass-like leaves and distinctive nodding umbels of bell-shaped, pink or white flowers that bloom in mid to late summer. Growing from a bulb, it typically reaches a height of 1 to 2 feet. It's primarily grown outdoors in gardens and naturalized areas for its ornamental value and edible bulbs and leaves. While it can be grown in containers, it requires very bright light and may not thrive indoors long-term.
Quick Plant Comparison
| Feature | Lacy Tree Philodendron | Nodding Onion |
|---|---|---|
| Light | Bright, indirect light. Avoid direct sunlight, especially during the hottest part of the day. | Full sun to partial shade |
| Watering | Every 1-2 weeks, depending on environmental conditions and pot size. | Every 7-10 days during the growing season, less frequently during dormancy. |
| Humidity | 40-70% | 30-50% |
| Temperature | 18-24°C | 15-27°C |
| Care Level | Moderate | Expert |
| Growth Rate | Moderate | Moderate |
| Max Height | 1-2 meters indoors | 30-60 cm outdoors, smaller in containers indoors |
| Pet Safety | ❌ Toxic To Pets | ❌ Toxic To Pets |
| Soil | Well-draining potting mix, such as a blend of peat moss, perlite, and vermiculite. | Well-draining soil, such as a mix of potting soil, sand, and perlite. |
| Beginner Friendly | With Caution | ❌ No |
| Weekly Maintenance | 10 minutes weekly | 10 minutes weekly during the growing season. |
🔬 Botanical Information — Comparing These Plants
Lacy Tree Philodendron
| Scientific Name | Thaumatophyllum bipinnatifidum |
|---|---|
| Family | Araceae |
| Native To | South America, specifically Brazil, Paraguay, Bolivia, and Argentina |
| Also Known As | Lacy Tree Philodendron, Split-Leaf Philodendron, Selloum |
| Leaves | The leaves are large, deeply lobed, and glossy green. They can grow up to 90 cm long and wide. The lobes are highly dissected, giving the plant a lacy appearance. New leaves emerge unfurled and gradually expand. |
| Flowers | It rarely flowers indoors. When it does flower (typically outdoors), it produces a spadix and spathe, similar to other members of the Araceae family. |
Nodding Onion
| Scientific Name | Allium cernuum |
|---|---|
| Family | Amaryllidaceae |
| Native To | North America |
| Also Known As | Nodding Onion, Lady's Leek |
| Leaves | The leaves are slender, linear, and grass-like, typically 15-30 cm long and 2-5 mm wide. They are green in color and have a smooth texture. The leaves emerge from the base of the plant. |
| Flowers | Nodding Onion produces bell-shaped flowers in nodding umbels. The flowers are typically pink or white, with six petals. Flowering is rare indoors due to insufficient light. |
📏 Size & Growth — Plant Comparison
Lacy Tree Philodendron
Nodding Onion
🌱 Propagation — Comparing Plant Growth
Lacy Tree Philodendron
Methods: Stem cuttings, Division, Seed (though rare indoors)
Difficulty: Moderate
Tips: Take stem cuttings with aerial roots and place them in water or directly into moist potting mix. Keep the cutting warm and humid. Division can be done when repotting mature plants.
Nodding Onion
Methods: Seed, Bulb division
Difficulty: Easy
Tips: Divide bulbs in early spring or late fall. Sow seeds in spring or fall, providing consistent moisture until germination.
✨ Benefits & Features — Comparing Plant Value
Lacy Tree Philodendron
The deeply lobed leaves are its most distinctive feature, giving it a lush, tropical appearance. It develops a trunk-like stem as it matures, adding to its architectural appeal. It is not a true philodendron, despite its common name.
- ✓ Adds a tropical aesthetic to your home
- ✓ Purifies the air by removing toxins
- ✓ Creates a relaxing and calming atmosphere
- ✓ Provides a sense of connection to nature
- ✓ Relatively easy to care for, boosting confidence in plant care abilities
- 🌬️ NASA-verified air purifier
- ⚠️ Toxic to pets
Nodding Onion
The most distinctive feature of Allium cernuum is its nodding flower umbels, which differentiate it from other onion species. Its mild onion flavor also makes it a desirable edible ornamental plant.
- ✓ Attracts pollinators like bees and butterflies.
- ✓ Provides edible bulbs and leaves for culinary use.
- ✓ Deer-resistant, protecting your garden from damage.
- ✓ Adds visual interest with its unique nodding flowers.
- ✓ Supports native ecosystems.
- ⚠️ Toxic to pets
📅 Maintenance Schedule — Plant Care Comparison
Lacy Tree Philodendron
Nodding Onion
🌞 Light Requirements
Lacy Tree Philodendron
Bright, indirect light. Avoid direct sunlight, especially during the hottest part of the day.
Low light tolerant: ✅ Yes
Nodding Onion
Full sun to partial shade
Low light tolerant: ❌ No
💧 Watering Needs
Lacy Tree Philodendron
Water thoroughly when the top 2-3 inches of soil are dry. Allow excess water to drain away. Overwatering can lead to root rot, indicated by yellowing leaves and a musty smell. Underwatering results in drooping leaves and dry, crispy edges.
Nodding Onion
Water thoroughly when the top inch of soil feels dry. Avoid overwatering, which can lead to bulb rot. Reduce watering during dormancy in late fall and winter. Signs of overwatering include yellowing leaves and a mushy bulb; underwatering is indicated by wilting and browning leaf tips.
🌡️ Temperature & Humidity
Lacy Tree Philodendron
Temperature: 18-24°C
Humidity: 40-70%
Nodding Onion
Temperature: 15-27°C
Humidity: 30-50%
🤔 Which Plant Is Right For You?
Lacy Tree Philodendron
Thaumatophyllum bipinnatifidumThose seeking a bold, tropical statement plant that is relatively easy to care for.
✅ Choose This Plant If...
- You want a large, statement plant for your home.
- You appreciate tropical foliage.
- You are looking for a relatively low-maintenance plant.
- You have a space with bright, indirect light.
- You want to add a touch of the jungle to your indoor environment.
❌ Skip This Plant If...
- You have pets that may ingest the plant.
- You have limited space.
- You tend to overwater plants.
Nodding Onion
Allium cernuumExperienced gardeners looking for a native, edible, and ornamental plant for their outdoor garden.
✅ Choose This Plant If...
- You want a native plant that attracts pollinators.
- You want an edible plant with a mild onion flavor.
- You have a sunny garden space.
- You want a deer-resistant plant.
- You enjoy the unique nodding flower heads.
❌ Skip This Plant If...
- You have pets that may ingest the plant.
- You do not have a sunny location.
- You are looking for a low-maintenance indoor plant.
🎯 Quick Verdict
⚡ Key Differences Between These Plants
Lacy Tree Philodendron is rated Moderate care level, while Nodding Onion is Expert.
💡 Pro Tips For Comparing These Plants
Lacy Tree Philodendron Care Tips
Lacy Tree Philodendrons are relatively easy to care for indoors, provided they receive adequate light and are not overwatered. They require well-draining soil and occasional fertilization. Regular cleaning of the leaves will keep them healthy and attractive. They can become large, so provide ample space.
- Provide bright, indirect light for optimal growth.
- Allow the top 2-3 inches of soil to dry out before watering.
- Fertilize regularly during the growing season.
- Wipe the leaves with a damp cloth to remove dust and improve photosynthesis.
- Provide a support structure, such as a moss pole, for the plant to climb if desired.
Nodding Onion Care Tips
Nodding Onion is primarily an outdoor plant that requires full sun and well-draining soil. It can be challenging to grow indoors due to its high light requirements. Providing adequate light and preventing overwatering are crucial for success. It is also toxic to pets.
- Plant in well-draining soil to prevent bulb rot.
- Provide at least 6 hours of direct sunlight daily for optimal growth and flowering.
- Water deeply but infrequently, allowing the soil to dry out slightly between waterings.
- Fertilize monthly during the growing season with a balanced fertilizer.
- Divide bulbs every few years to prevent overcrowding and maintain vigor.
⚠️ Common Problems & Solutions — Plant Care Comparison
Lacy Tree Philodendron
Nodding Onion
❓ Frequently Asked Questions — Comparing These Plants
Lacy Tree Philodendron
What are the light requirements for Lacy Tree Philodendron?
Lacy Tree Philodendrons require bright, indirect light to thrive. Direct sunlight can scorch their leaves, causing unsightly burns. An east-facing window is often ideal, providing gentle morning sun. A north-facing window can also work, but the plant may grow slower. If placed near a south or west-facing window, use a sheer curtain to filter the intense light. Insufficient light can lead to leggy growth and smaller, less-defined leaves. Rotate the plant regularly to ensure even light exposure on all sides. Monitor the leaves for signs of light stress, such as yellowing or browning.
How do I care for Lacy Tree Philodendron?
Lacy Tree Philodendrons thrive in bright, indirect light; avoid direct sunlight to prevent leaf burn. Water when the top inch of soil feels dry, ensuring good drainage to prevent root rot. Maintain humidity levels around 60-70% by misting regularly or using a humidifier. Fertilize monthly during the growing season (spring and summer) with a balanced liquid fertilizer diluted to half strength. Repot every 1-2 years, or when the plant becomes root-bound, using a well-draining potting mix. Provide support, such as a moss pole, as the plant matures and its aerial roots develop. Regularly wipe the leaves to remove dust and pests. Keep temperatures between 65-80°F (18-27°C).
How do I propagate Lacy Tree Philodendron?
Lacy Tree Philodendrons can be easily propagated through stem cuttings, division, or air layering. For stem cuttings, take a cutting with at least one node and place it in water or directly into moist potting mix. Keep the cutting in a warm, humid environment until roots develop. For division, carefully separate the root ball into smaller sections and repot each section into its own container. Air layering involves wrapping a node with moist sphagnum moss and covering it with plastic wrap until roots form, then cutting below the roots and potting the new plant.
Nodding Onion
What are the light requirements for Nodding Onion?
Nodding Onion thrives in full sun, requiring at least 6 hours of direct sunlight per day to produce abundant blooms. However, it can also tolerate partial shade, especially in hotter climates where intense afternoon sun can scorch the foliage. When grown indoors, place Nodding Onion near a south-facing window to maximize light exposure.
How do I care for Nodding Onion?
Nodding Onion thrives in well-draining soil and prefers full sun to partial shade. Water regularly, especially during dry periods, but avoid overwatering to prevent bulb rot. Fertilize sparingly in early spring with a balanced fertilizer to encourage blooming. Deadhead spent flowers to promote continued blooming and prevent self-seeding. In colder climates, provide winter protection by mulching around the base of the plant.
How do I propagate Nodding Onion?
Nodding Onion can be easily propagated through division. In early spring or fall, carefully dig up a mature clump of Nodding Onion and gently separate the bulbs, ensuring each division has healthy roots and foliage. Replant the divisions in well-draining soil, spacing them appropriately.
Last updated: May 11, 2026 — Plant care data reviewed and verified by our editorial team.