Lacy Tree Philodendron vs Sweet William 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.
Sweet William
Dianthus barbatus
Sweet William is a popular biennial or short-lived perennial flowering plant, typically grown as an ornamental in gardens. It features clusters of brightly colored, often fragrant flowers in shades of red, pink, white, purple, and bicolors. The plant has a clumping growth habit, reaching heights of 30-60 cm. While it can be grown indoors, it requires very bright light and cool temperatures to thrive, making it primarily an outdoor plant. People grow it for its attractive flowers, fragrance, and ease of cultivation in garden beds and borders.
Quick Plant Comparison
| Feature | Lacy Tree Philodendron | Sweet William |
|---|---|---|
| Light | Bright, indirect light. Avoid direct sunlight, especially during the hottest part of the day. | Full sun to partial shade. Requires at least 6 hours of direct sunlight daily for optimal flowering. |
| Watering | Every 1-2 weeks, depending on environmental conditions and pot size. | Every 5-7 days outdoors, less frequently if grown indoors (though indoor growing is not ideal). |
| Humidity | 40-70% | 40-60% |
| Temperature | 18-24°C | 15-21°C |
| Care Level | Moderate | Expert |
| Growth Rate | Moderate | Moderate |
| Max Height | 1-2 meters indoors | 30-60 cm (outdoors). Significantly smaller if grown indoors, typically 15-30cm. |
| 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, fertile soil. A mix of garden soil, compost, and perlite is suitable. |
| Beginner Friendly | With Caution | ❌ No |
| Weekly Maintenance | 10 minutes weekly | 15 minutes weekly |
🔬 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. |
Sweet William
| Scientific Name | Dianthus barbatus |
|---|---|
| Family | Caryophyllaceae |
| Native To | Southern Europe to Asia |
| Also Known As | Sweet William, Sweet-William |
| Leaves | Lance-shaped, blue-green leaves, 5-10 cm long. |
| Flowers | Flowers are produced in dense clusters (corymbs), 5-10 cm in diameter. Each flower is about 2-3 cm across, with five petals that are often fringed or toothed. Colors range from red, pink, white, purple, and bicolors. Rarely flowers indoors due to light requirements. |
📏 Size & Growth — Plant Comparison
Lacy Tree Philodendron
Sweet William
🌱 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.
Sweet William
Methods: Seed, Stem cuttings, Division
Difficulty: Easy
Tips: Sow seeds indoors 6-8 weeks before the last frost or directly outdoors in spring. Stem cuttings can be taken in late spring or early summer. Divide clumps in early spring or fall.
✨ 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
Sweet William
Sweet William is known for its clusters of brightly colored, fragrant flowers. It is a popular choice for cottage gardens and cut flower arrangements.
- ✓ Attracts pollinators to your garden
- ✓ Provides fragrant and colorful blooms
- ✓ Easy to propagate from seed
- ✓ Adds a touch of cottage charm to your landscape
- ✓ Can be used in cut flower arrangements
- ⚠️ Toxic to pets
📅 Maintenance Schedule — Plant Care Comparison
Lacy Tree Philodendron
Sweet William
🌞 Light Requirements
Lacy Tree Philodendron
Bright, indirect light. Avoid direct sunlight, especially during the hottest part of the day.
Low light tolerant: ✅ Yes
Sweet William
Full sun to partial shade. Requires at least 6 hours of direct sunlight daily for optimal flowering.
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.
Sweet William
Water thoroughly when the top inch of soil feels dry. Avoid overwatering, as this can lead to root rot. Ensure good drainage. Signs of underwatering include wilting leaves, while overwatering can cause yellowing leaves and mushy stems.
🌡️ Temperature & Humidity
Lacy Tree Philodendron
Temperature: 18-24°C
Humidity: 40-70%
Sweet William
Temperature: 15-21°C
Humidity: 40-60%
🤔 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.
Sweet William
Dianthus barbatusGardeners who want colorful, fragrant flowers in their garden beds and borders.
✅ Choose This Plant If...
- You want a fragrant flower that attracts pollinators.
- You enjoy cottage garden aesthetics.
- You want a plant with a variety of flower colors.
- You are looking for a relatively easy-to-grow garden plant.
- You want to add cut flowers to your home.
❌ Skip This Plant If...
- You have pets that might ingest the plant.
- You don't have a sunny outdoor space.
- 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 Sweet William 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.
Sweet William Care Tips
Sweet William is primarily an outdoor plant that requires full sun and well-drained soil. Indoor cultivation is challenging due to the need for intense light and cool temperatures. It is toxic to pets, requiring careful placement. Regular watering and fertilization are essential for healthy growth and flowering.
- Deadhead spent flowers regularly to encourage more blooms.
- Provide well-draining soil to prevent root rot.
- Fertilize regularly during the growing season.
- Protect from frost in colder climates.
- Monitor for pests and diseases and treat promptly.
⚠️ Common Problems & Solutions — Plant Care Comparison
Lacy Tree Philodendron
Sweet William
❓ 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.
Sweet William
What are the light requirements for Sweet William?
Sweet William flourishes with plenty of sunlight, ideally needing at least six hours of direct sunlight each day. When grown in shadier conditions, the plant may produce fewer flowers and its stems can become leggy. An east-facing location that provides morning sun and afternoon shade is ideal in hotter climates. In cooler regions, a south-facing location is preferable to ensure sufficient sunlight. If grown indoors, place Sweet William near a sunny window, supplementing with grow lights if necessary, particularly during winter months when natural light is limited. Insufficient light can lead to weak growth and reduced flowering.
How do I care for Sweet William?
Sweet William thrives in well-drained soil and requires full sun to partial shade, ideally at least 6 hours of sunlight daily. Water regularly, especially during dry periods, ensuring the soil remains consistently moist but not waterlogged. Fertilize every 4-6 weeks during the growing season with a balanced, water-soluble fertilizer to promote abundant blooms. Deadhead spent flowers to encourage further flowering. Sweet William prefers cooler temperatures and can tolerate light frost. In warmer climates, provide some afternoon shade to prevent scorching. Protect from strong winds and heavy rain, which can damage the delicate stems and flowers. Mulch around the base of the plant to retain moisture and suppress weeds.
How do I propagate Sweet William?
Sweet William can be propagated through several methods.
Last updated: April 20, 2026 — Plant care data reviewed and verified by our editorial team.