Mother of Thyme vs Princess Tree Plant Comparison
Compare these two plants side by side — care needs, key differences, and which is right for your home.
Mother of Thyme
Thymus serpyllum
Thymus serpyllum, commonly known as Mother of Thyme or Creeping Thyme, is a low-growing, mat-forming perennial herb. It typically reaches only 1-3 inches in height but spreads widely. Its small, oval leaves are aromatic, releasing a pleasant fragrance when crushed. Tiny pink to purple flowers bloom in summer, attracting pollinators. Primarily an outdoor plant, it's often used as a ground cover in gardens, rockeries, and between paving stones. People grow it for its ornamental value, fragrant foliage, and culinary uses.
Princess Tree
Paulownia tomentosa
Paulownia tomentosa, the Princess Tree, is a deciduous tree known for its rapid growth and large, heart-shaped leaves. It can reach heights of 30-60 feet. In spring, it produces fragrant, pale purple flowers in panicles before the leaves emerge. These are followed by persistent seed capsules. While admired for its ornamental value, it's considered invasive in many regions due to its prolific seed production and ability to resprout from roots. It is primarily an outdoor tree and not suitable for indoor cultivation.
Quick Plant Comparison
| Feature | Mother of Thyme | Princess Tree |
|---|---|---|
| Light | Full sun (at least 6 hours of direct sunlight daily) | Full sun |
| Watering | Every 1-2 weeks, depending on weather and soil drainage | Once or twice a week during the growing season, less frequently during dormancy. |
| Humidity | 30-50% | 30-50% |
| Temperature | 15-27°C | 15-27°C |
| Care Level | Expert | Expert |
| Growth Rate | Moderate | Fast |
| Max Height | 2-8 cm (outdoor) | Not applicable - unsuitable for indoor growing. Outdoors: 9-18 meters |
| Pet Safety | ✅ Safe | ❌ Toxic To Pets |
| Soil | Well-draining, sandy or gravelly soil | Well-draining soil, adaptable to various soil types including clay, loam, and sand. |
| Beginner Friendly | ❌ No | ❌ No |
| Weekly Maintenance | 5 minutes weekly | 1-2 hours per month, primarily for pruning and managing spread. |
🔬 Botanical Information — Comparing These Plants
Mother of Thyme
| Scientific Name | Thymus serpyllum |
|---|---|
| Family | Lamiaceae |
| Native To | Europe and North Africa |
| Also Known As | Mother of Thyme, Creeping Thyme, Wild Thyme |
| Leaves | Small, oval-shaped leaves, typically 0.5-1 cm long, with a slightly fuzzy texture. The leaves are dark green and highly aromatic, releasing a thyme scent when crushed. |
| Flowers | Produces small, tubular flowers in shades of pink to purple during the summer months. Flowering is more prolific outdoors in full sun. Rarely flowers indoors. |
Princess Tree
| Scientific Name | Paulownia tomentosa |
|---|---|
| Family | Paulowniaceae |
| Native To | Central and Western China |
| Also Known As | Princess Tree, Empress Tree, Foxglove Tree |
| Leaves | The leaves are large, heart-shaped (cordate), and can reach up to 12 inches in length. They are typically a medium green color and have a slightly fuzzy texture when young. |
| Flowers | It rarely, if ever, flowers indoors. Outdoors, it produces large panicles of fragrant, pale purple flowers in spring before the leaves emerge. |
📏 Size & Growth — Plant Comparison
Mother of Thyme
Princess Tree
🌱 Propagation — Comparing Plant Growth
Mother of Thyme
Methods: Stem cuttings, Division, Seed
Difficulty: Easy
Tips: Take stem cuttings in spring or summer and root them in well-draining soil. Division can be done in spring or fall. Seeds can be sown in spring after the last frost.
Princess Tree
Methods: Seeds, root cuttings, stem cuttings
Difficulty: Moderate
Tips: For seeds, cold stratify for several weeks before sowing. Root cuttings should be taken in late winter. Stem cuttings can be taken in summer.
✨ Benefits & Features — Comparing Plant Value
Mother of Thyme
Mother of Thyme is known for its ability to release a pleasant fragrance when stepped on, making it a popular choice for pathways and ground cover. Its drought tolerance and low-maintenance nature make it a versatile addition to various garden settings.
- ✓ Provides fragrant ground cover
- ✓ Attracts pollinators to the garden
- ✓ Edible herb for culinary use
- ✓ Drought-tolerant and low-maintenance
- ✓ Adds visual interest to rock gardens and pathways
- 🐾 Pet Safe
Princess Tree
Its rapid growth rate and large leaves distinguish it from many other trees. The fragrant spring flowers are also a notable feature. However, its invasive nature is a significant consideration.
- ✓ Provides shade in large outdoor spaces.
- ✓ Offers fragrant spring flowers.
- ✓ Attracts pollinators.
- ✓ Provides habitat for wildlife.
- ✓ Can be used for erosion control on slopes.
- ⚠️ Toxic to pets
📅 Maintenance Schedule — Plant Care Comparison
Mother of Thyme
Princess Tree
🌞 Light Requirements
Mother of Thyme
Full sun (at least 6 hours of direct sunlight daily)
Low light tolerant: ❌ No
Princess Tree
Full sun
Low light tolerant: ❌ No
💧 Watering Needs
Mother of Thyme
Water thoroughly when the soil surface feels dry to the touch. Avoid overwatering, as this can lead to root rot. Allow the soil to dry out slightly between waterings. Signs of overwatering include yellowing leaves and a musty smell. Underwatering results in wilting and dry, brittle leaves.
Princess Tree
Water deeply when the topsoil feels dry to the touch, especially during the growing season. Avoid overwatering, which can lead to root rot. Reduce watering in the dormant season. Signs of underwatering include wilting leaves; overwatering includes yellowing leaves and soggy soil.
🌡️ Temperature & Humidity
Mother of Thyme
Temperature: 15-27°C
Humidity: 30-50%
Princess Tree
Temperature: 15-27°C
Humidity: 30-50%
🤔 Which Plant Is Right For You?
Mother of Thyme
Thymus serpyllumGardeners looking for a fragrant, low-maintenance ground cover for sunny areas.
✅ Choose This Plant If...
- You want a fragrant ground cover that releases scent when stepped on.
- You need a plant that tolerates dry conditions and full sun.
- You want to attract pollinators to your garden.
- You enjoy using fresh herbs in your cooking.
- You want a low-maintenance plant that requires minimal care.
❌ Skip This Plant If...
- You don't have a sunny outdoor space.
- You tend to overwater your plants.
- You are looking for a tall, showy plant.
Princess Tree
Paulownia tomentosaLandowners with large properties in non-invasive regions who appreciate fast-growing shade trees with showy spring flowers.
✅ Choose This Plant If...
- You have a large outdoor space and want a fast-growing shade tree.
- You appreciate fragrant spring flowers.
- You are prepared to manage its potentially invasive nature.
- You want a tree that can tolerate a variety of soil conditions.
- You are looking for a tree that provides habitat for wildlife.
❌ Skip This Plant If...
- You have a small garden or limited space.
- You live in a region where it is considered invasive.
- You are not prepared to manage its rapid growth and spread.
🎯 Quick Verdict
⚡ Key Differences Between These Plants
Mother of Thyme needs full sun (at least 6 hours of direct sunlight daily), while Princess Tree prefers full sun.
Mother of Thyme has moderate growth, while Princess Tree grows fast.
💡 Pro Tips For Comparing These Plants
Mother of Thyme Care Tips
Mother of Thyme is primarily an outdoor plant that requires full sun and well-draining soil. Growing it indoors is challenging due to its high light requirements. It is prone to root rot if overwatered. Indoor success requires very bright light and careful watering.
- Plant in well-draining soil to prevent root rot.
- Provide at least 6 hours of direct sunlight daily.
- Water deeply but infrequently, allowing the soil to dry out between waterings.
- Prune lightly after flowering to maintain shape.
- Avoid over-fertilizing, as this can lead to leggy growth.
Princess Tree Care Tips
Paulownia tomentosa is an outdoor tree that requires full sun and well-draining soil. It is not suitable for indoor cultivation due to its size and light requirements. It is considered invasive in many areas, requiring careful management to prevent its spread.
- Monitor for invasive spread and remove seedlings promptly.
- Prune regularly to maintain shape and remove dead or damaged branches.
- Water deeply during dry periods, especially when young.
- Fertilize in early spring with a balanced fertilizer.
- Protect young trees from strong winds.
⚠️ Common Problems & Solutions — Plant Care Comparison
Mother of Thyme
Princess Tree
❓ Frequently Asked Questions — Comparing These Plants
Mother of Thyme
What are the light requirements for Mother of Thyme?
Mother of Thyme thrives in bright, indirect sunlight. Aim for at least six hours of sunlight per day for optimal growth and flowering. Insufficient light can lead to leggy growth and reduced blooming. An east- or south-facing window is usually ideal, but be mindful of intense afternoon sun, which can scorch the leaves, especially during the summer months.
How do I care for Mother of Thyme?
Mother of Thyme is relatively easy to care for, making it a popular choice for both novice and experienced plant enthusiasts. Provide it with plenty of bright, indirect sunlight; at least 6 hours a day is ideal. Water thoroughly only when the soil is completely dry, as overwatering can lead to root rot. Use well-draining soil, such as a cactus or succulent mix, to ensure proper drainage.
How do I propagate Mother of Thyme?
Mother of Thyme is easily propagated through several methods. Leaf cuttings involve gently twisting off a healthy leaf and allowing it to callous over for a few days before placing it on well-draining soil. Offsets, which are small plantlets that grow around the base of the mother plant, can be carefully separated and planted in their own pots. Stem cuttings are another effective method.
Princess Tree
What are the light requirements for Princess Tree?
Princess Tree thrives in bright, indirect light. Insufficient light can lead to leggy growth and reduced leaf size. Place your Princess Tree near a sunny window, ideally facing east or west. If you only have a south-facing window, filter the light with a sheer curtain to prevent scorching. Rotate the plant regularly to ensure even light exposure on all sides. If natural light is limited, consider supplementing with artificial grow lights to provide the necessary light intensity. Pale leaves or slow growth can indicate insufficient light.
How do I care for Princess Tree?
To successfully grow Princess Tree indoors, provide it with bright, indirect light; direct sunlight can scorch the leaves. Water thoroughly when the top inch of soil feels dry, ensuring good drainage to prevent root rot. Maintain moderate humidity levels, especially during the winter months when indoor air tends to be drier. Fertilize regularly during the growing season (spring and summer) with a balanced liquid fertilizer diluted to half strength. Repot the plant every 1-2 years, or when it becomes root-bound, using a well-draining potting mix. Prune as needed to maintain shape and remove any dead or damaged leaves. Monitor for pests such as spider mites and aphids, and treat promptly with insecticidal soap or neem oil. Maintain stable temperatures, avoiding drastic fluctuations.
How do I propagate Princess Tree?
Princess Tree can be propagated through stem cuttings and air layering.
Last updated: May 16, 2026 — Plant care data reviewed and verified by our editorial team.