Creeping Thyme vs Pickerel Weed Plant Comparison
Compare these two plants side by side — care needs, key differences, and which is right for your home.
Creeping Thyme
Thymus serpyllum
Creeping Thyme is a low-growing, mat-forming perennial herb known for its aromatic foliage and tiny, vibrant flowers. It typically reaches only a few inches in height but spreads horizontally, creating a dense carpet. Primarily an outdoor plant, it thrives in sunny locations with well-drained soil. People grow it for ground cover, rock gardens, between stepping stones, and for its culinary and medicinal uses. While it can be attempted indoors, it requires very specific conditions and is unlikely to thrive long-term.
Pickerel Weed
Pontederia cordata
Pickerelweed is an aquatic perennial herb typically found in shallow water habitats like ponds, marshes, and streams. It features distinctive heart-shaped leaves and a prominent flower spike that blooms in summer. The plant grows from rhizomes, forming dense colonies. While primarily an outdoor plant, it is occasionally grown in large water gardens or aquariums. It is valued for its attractive foliage and flowers, which attract pollinators and provide habitat for aquatic wildlife.
Quick Plant Comparison
| Feature | Creeping Thyme | Pickerel Weed |
|---|---|---|
| Light | Full sun (at least 6-8 hours of direct sunlight daily) | Full sun to partial shade |
| Watering | Every 1-2 weeks, depending on environmental conditions and soil drainage. Outdoors, less frequent watering is needed once established. | Daily to maintain water levels |
| Humidity | 30-50% | 60-90% |
| Temperature | 15-24°C | 15-27°C |
| Care Level | Expert | Expert |
| Growth Rate | Moderate To Fast, Can Be An Aggressive Spreader Outdoors. | Fast |
| Max Height | 2-5 cm (indoors unlikely to reach this) | 0.3-1 meter (outdoor, less in containers) |
| Pet Safety | ✅ Safe | ❌ Toxic To Pets |
| Soil | Well-drained, sandy or gravelly soil. Avoid heavy clay soils. | Heavy clay soil or aquatic planting mix |
| Beginner Friendly | ❌ No | ❌ No |
| Weekly Maintenance | 5 minutes weekly outdoors; 15 minutes weekly indoors (if attempting to grow indoors) | 30 minutes weekly (including algae control, pruning, and water level maintenance) |
🔬 Botanical Information — Comparing These Plants
Creeping Thyme
| Scientific Name | Thymus serpyllum |
|---|---|
| Family | Lamiaceae |
| Native To | Europe and North Africa |
| Also Known As | Creeping Thyme, Mother of Thyme, Wild Thyme |
| Leaves | The leaves of Creeping Thyme are small, oval-shaped, and dark green. They are typically less than 1 cm long and have a slightly fuzzy texture. The leaves are highly aromatic, releasing a pleasant scent when crushed. |
| Flowers | Creeping Thyme produces tiny, tubular flowers in shades of pink, purple, or white. Flowering typically occurs in late spring to early summer. It is unlikely to flower indoors unless provided with very intense light. |
Pickerel Weed
| Scientific Name | Pontederia cordata |
|---|---|
| Family | Pontederiaceae |
| Native To | North America, South America |
| Also Known As | Pickerelweed, Pickerel Weed, Heartleaf Pickerelweed |
| Leaves | Heart-shaped (cordate) leaves, typically 10-25 cm long and 5-15 cm wide. The leaves are smooth, glossy green, and have prominent veins. They are attached to long petioles that emerge from the rhizomes. |
| Flowers | Produces a dense spike of small, violet-blue flowers in summer. The flowers are about 1 cm long and have six petals. They are arranged spirally around the spike and bloom sequentially from the bottom up. Rarely flowers indoors. |
📏 Size & Growth — Plant Comparison
Creeping Thyme
Pickerel Weed
🌱 Propagation — Comparing Plant Growth
Creeping Thyme
Methods: Stem cuttings, Division, Seed
Difficulty: Easy
Tips: Take stem cuttings in spring or summer and root them in well-drained soil. Division can be done in spring or fall. Seeds can be sown directly in the garden in spring.
Pickerel Weed
Methods: Division of rhizomes, Seed
Difficulty: Easy
Tips: Divide rhizomes in spring or early summer. Ensure each division has healthy roots and shoots. Plant in aquatic soil and keep submerged in water. Seeds can be sown in shallow water in spring.
✨ Benefits & Features — Comparing Plant Value
Creeping Thyme
Creeping Thyme is known for its ability to release its fragrance when stepped on, making it a delightful addition to pathways and walkways. It is also a very drought-tolerant plant once established, making it ideal for xeriscaping.
- ✓ Attracts pollinators to your garden
- ✓ Provides aromatic ground cover
- ✓ Edible leaves for culinary use
- ✓ Drought tolerant once established
- ✓ Adds a charming, natural look to your landscape
- 🐾 Pet Safe
Pickerel Weed
Pickerelweed is a native aquatic plant that provides important habitat and food sources for wildlife. Its distinctive heart-shaped leaves and purple flower spikes make it an attractive addition to water gardens. It is also known for its ability to help filter and oxygenate water.
- ✓ Provides habitat for aquatic wildlife
- ✓ Attracts pollinators such as bees and butterflies
- ✓ Helps to filter and oxygenate water in ponds and aquariums
- ✓ Adds visual interest with its unique foliage and flowers
- ✓ Contributes to a natural and balanced ecosystem in aquatic environments
- ⚠️ Toxic to pets
📅 Maintenance Schedule — Plant Care Comparison
Creeping Thyme
Pickerel Weed
🌞 Light Requirements
Creeping Thyme
Full sun (at least 6-8 hours of direct sunlight daily)
Low light tolerant: ❌ No
Pickerel Weed
Full sun to partial shade
Low light tolerant: ❌ No
💧 Watering Needs
Creeping Thyme
Water thoroughly when the soil is dry to the touch. Avoid overwatering, as this can lead to root rot. Allow the soil to dry out slightly between waterings. Indoors, this is very difficult to achieve.
Pickerel Weed
Requires consistently moist to wet conditions. If grown in a container, ensure the pot is sitting in a tray of water or submerged in a larger water feature. Overwatering is not a concern as it is an aquatic plant. Underwatering will cause the leaves to wilt and brown.
🌡️ Temperature & Humidity
Creeping Thyme
Temperature: 15-24°C
Humidity: 30-50%
Pickerel Weed
Temperature: 15-27°C
Humidity: 60-90%
🤔 Which Plant Is Right For You?
Creeping Thyme
Thymus serpyllumGardeners looking for a low-maintenance ground cover for sunny areas.
✅ Choose This Plant If...
- You want a fragrant ground cover that attracts bees.
- You have a sunny, well-drained garden area.
- You enjoy using fresh herbs in your cooking.
- You want a low-maintenance plant that tolerates drought.
- You want to create a charming, cottage-style garden.
❌ Skip This Plant If...
- You don't have a sunny location.
- You tend to overwater plants.
- You want a plant that thrives indoors without supplemental lighting.
Pickerel Weed
Pontederia cordataExperienced gardeners with ponds, water gardens, or large aquariums who want to add a native aquatic plant.
✅ Choose This Plant If...
- You have a pond or water garden and want a native plant.
- You want to attract pollinators and wildlife to your water feature.
- You need a plant that can tolerate consistently wet conditions.
- You appreciate the unique heart-shaped foliage and flower spikes.
- You are an experienced gardener looking for a rewarding aquatic plant challenge.
❌ Skip This Plant If...
- You do not have a suitable aquatic environment (pond, water garden, large aquarium).
- You are looking for a low-maintenance indoor plant.
- You have pets that might ingest the plant, as it is toxic to them.
🎯 Quick Verdict
⚡ Key Differences Between These Plants
Creeping Thyme needs full sun (at least 6-8 hours of direct sunlight daily), while Pickerel Weed prefers full sun to partial shade.
Creeping Thyme has moderate to fast, can be an aggressive spreader outdoors. growth, while Pickerel Weed grows fast.
💡 Pro Tips For Comparing These Plants
Creeping Thyme Care Tips
Creeping Thyme is primarily an outdoor plant and requires full sun and well-drained soil. Indoor cultivation is challenging due to the high light requirements and potential for root rot. It can be grown indoors with grow lights and careful watering, but success is not guaranteed.
- Ensure excellent drainage to prevent root rot.
- Provide at least 6-8 hours of direct sunlight daily.
- Prune lightly after flowering to maintain shape.
- Avoid over-fertilizing, as this can reduce flowering.
- Water deeply but infrequently, allowing the soil to dry out between waterings.
Pickerel Weed Care Tips
Pickerelweed is best suited for outdoor water gardens or large aquariums. It requires full sun and consistently wet conditions. Indoor cultivation is challenging due to the need for specialized aquatic environments and intense lighting. It is an aggressive spreader and needs containment.
- Ensure consistent water levels, especially during hot weather.
- Provide full sun for optimal flowering.
- Use aquatic plant fertilizer to promote healthy growth.
- Control algae growth to prevent it from smothering the plant.
- Protect rhizomes from freezing in colder climates.
⚠️ Common Problems & Solutions — Plant Care Comparison
Creeping Thyme
Pickerel Weed
❓ Frequently Asked Questions — Comparing These Plants
Creeping Thyme
What are the light requirements for Creeping Thyme?
Creeping Thyme needs at least six to eight hours of direct sunlight each day to thrive and produce abundant blooms. Insufficient light can lead to leggy growth, reduced flowering, and a weaker plant. When planting outdoors, choose a location that receives full sun throughout the day.
How do I care for Creeping Thyme?
Creeping Thyme thrives in full sun (6-8 hours daily) and well-drained soil. Water sparingly, allowing the soil to dry out between waterings to prevent root rot. Avoid overwatering, especially during the dormant winter months. Fertilize lightly in spring with a balanced, slow-release fertilizer to encourage blooming. Prune after flowering to maintain shape and promote denser growth. This also prevents the plant from becoming woody.
How do I propagate Creeping Thyme?
Creeping Thyme is easily propagated through division, stem cuttings, and layering. For division, carefully dig up an established plant and separate the root ball into smaller sections, ensuring each section has healthy roots and foliage. Replant the divisions in well-draining soil.
Pickerel Weed
What are the light requirements for Pickerel Weed?
Pickerel Weed thrives best in full sun, requiring at least six hours of direct sunlight daily. However, it can also tolerate partial shade, especially during the hottest part of the day. Insufficient light can lead to leggy growth, reduced flowering, and overall weaker plants.
How do I care for Pickerel Weed?
Pickerel Weed thrives in shallow water or moist soil. Plant in a pond, water garden, or a container submerged in water. Full sun to partial shade is ideal. Ensure the water is clean and well-oxygenated. Add aquatic plant fertilizer sparingly during the growing season (spring and summer). Remove dead leaves and flowers regularly.
How do I propagate Pickerel Weed?
Pickerel Weed can be easily propagated through division or cuttings.
Last updated: April 17, 2026 — Plant care data reviewed and verified by our editorial team.