Lysimachia vs Pencil Cactus Plant Comparison
Compare these two plants side by side — care needs, key differences, and which is right for your home.
Lysimachia
Lysimachia nummularia
Lysimachia nummularia, commonly known as Creeping Jenny or Moneywort, is a perennial ground cover characterized by its trailing stems and rounded, coin-like leaves. It typically grows to only a few inches in height but can spread extensively. While primarily an outdoor plant, it is sometimes grown in hanging baskets or containers indoors. People grow it for its attractive foliage and ability to quickly cover ground, creating a lush, green carpet. Its vibrant green or golden foliage adds visual interest to gardens and landscapes. It is not ideally suited for long-term indoor growth.
Pencil Cactus
Euphorbia tirucalli
Euphorbia tirucalli, commonly known as Pencil Cactus, is a succulent shrub or small tree characterized by its smooth, cylindrical, pencil-thick green branches. It is virtually leafless for most of the year, with small, inconspicuous leaves appearing only briefly during the growing season. This plant can reach significant heights outdoors, but remains smaller when grown in containers. It's popular for its unique architectural form and drought tolerance. People grow it for its sculptural qualities and low maintenance requirements. It is primarily an outdoor plant but can be grown indoors with proper care.
Quick Plant Comparison
| Feature | Lysimachia | Pencil Cactus |
|---|---|---|
| Light | Full sun to partial shade outdoors. Indoors, requires very bright, direct light for several hours daily. | Full sun to partial shade. Requires at least 6 hours of direct sunlight daily for optimal growth and color. |
| Watering | Every 3-7 days, depending on light and temperature. | Every 2-4 weeks, depending on environmental conditions and pot size. |
| Humidity | 30-50% | 30-50% |
| Temperature | 15-24°C | 18-27°C |
| Care Level | Expert | Moderate |
| Growth Rate | Fast | Moderate |
| Max Height | 2-10 cm (indoors) | 1-2 meters indoors, up to 7 meters outdoors |
| Pet Safety | ❌ Toxic To Pets | ❌ Toxic To Pets |
| Soil | Well-draining potting mix or garden soil. | Well-draining succulent or cactus mix |
| Beginner Friendly | ❌ No | With Caution |
| Weekly Maintenance | 15 minutes weekly | 5-10 minutes bi-weekly |
🔬 Botanical Information — Comparing These Plants
Lysimachia
| Scientific Name | Lysimachia nummularia |
|---|---|
| Family | Primulaceae |
| Native To | Europe |
| Also Known As | Creeping Jenny, Moneywort, Twopenny Grass |
| Leaves | Rounded, coin-like leaves that are typically bright green, but some varieties have golden or chartreuse foliage. Leaves are small, usually less than an inch in diameter, and have a smooth texture. |
| Flowers | It may produce small, yellow, cup-shaped flowers in the summer, but flowering is rare indoors. |
Pencil Cactus
| Scientific Name | Euphorbia tirucalli |
|---|---|
| Family | Euphorbiaceae |
| Native To | East Africa, India |
| Also Known As | Pencil Cactus, Milk Bush, Indian Tree Spurge, Sticks on Fire |
| Leaves | Leaves are small, lance-shaped, and inconspicuous, appearing only briefly during the growing season. They are typically less than 1 cm long and quickly fall off, leaving the plant virtually leafless. |
| Flowers | It rarely flowers indoors. Outdoors, it produces small, inconspicuous yellow flowers at the tips of the branches, but flowering is infrequent. |
📏 Size & Growth — Plant Comparison
Lysimachia
Pencil Cactus
🌱 Propagation — Comparing Plant Growth
Lysimachia
Methods: Stem cuttings, Division
Difficulty: Easy
Tips: Take stem cuttings and place them in water or directly into moist soil. Keep the soil consistently moist until roots develop. Division can be done by separating rooted sections of the plant.
Pencil Cactus
Methods: Stem cuttings
Difficulty: Easy
Tips: Allow the cut end to callus over for several days before planting in well-draining soil. Wear gloves to avoid skin irritation from the sap.
✨ Benefits & Features — Comparing Plant Value
Lysimachia
Its trailing growth habit and coin-shaped leaves make it a unique and attractive ground cover. It can tolerate a range of soil conditions and is relatively easy to propagate.
- ✓ Provides ground cover and helps prevent soil erosion.
- ✓ Adds visual interest with its bright green or golden foliage.
- ✓ Can be used in hanging baskets or containers.
- ✓ Relatively easy to propagate.
- ✓ Can tolerate a range of soil conditions.
- ⚠️ Toxic to pets
Pencil Cactus
Its unique pencil-like branches and minimal foliage give it a distinct architectural appearance. The plant's drought tolerance and ability to thrive in harsh conditions make it a resilient and low-maintenance choice.
- ✓ Drought-tolerant and low-maintenance
- ✓ Adds a unique sculptural element to indoor spaces
- ✓ Can improve indoor air quality by absorbing carbon dioxide
- ✓ Provides a visually interesting focal point
- ✓ Relatively pest-resistant when properly cared for
- ⚠️ Toxic to pets
📅 Maintenance Schedule — Plant Care Comparison
Lysimachia
Pencil Cactus
🌞 Light Requirements
Lysimachia
Full sun to partial shade outdoors. Indoors, requires very bright, direct light for several hours daily.
Low light tolerant: ❌ No
Pencil Cactus
Full sun to partial shade. Requires at least 6 hours of direct sunlight daily for optimal growth and color.
Low light tolerant: ❌ No
💧 Watering Needs
Lysimachia
Water thoroughly when the top inch of soil feels dry. Avoid overwatering, as it can lead to root rot. Signs of underwatering include wilting leaves. Signs of overwatering include yellowing leaves and soggy soil.
Pencil Cactus
Allow the soil to dry out completely between waterings. Water thoroughly when the soil is dry to the touch. Reduce watering frequency during the dormant winter months. Overwatering can lead to root rot. Signs of underwatering include shriveled branches. Signs of overwatering include yellowing or mushy branches.
🌡️ Temperature & Humidity
Lysimachia
Temperature: 15-24°C
Humidity: 30-50%
Pencil Cactus
Temperature: 18-27°C
Humidity: 30-50%
🤔 Which Plant Is Right For You?
Lysimachia
Lysimachia nummulariaExperienced gardeners looking for a ground cover for outdoor spaces or those willing to provide very bright light and manage its growth indoors.
✅ Choose This Plant If...
- You want a fast-growing ground cover for your garden.
- You have a very bright, sunny indoor space.
- You enjoy the look of trailing foliage in hanging baskets.
- You want a plant that is relatively easy to propagate.
- You are experienced with managing potentially aggressive plants.
❌ Skip This Plant If...
- You have pets that may ingest the plant.
- You have limited sunlight indoors.
- You are looking for a low-maintenance indoor plant.
Pencil Cactus
Euphorbia tirucalliExperienced plant owners who want a unique, sculptural succulent and can provide ample sunlight and keep it away from pets and children.
✅ Choose This Plant If...
- You want a visually striking, low-maintenance plant.
- You have a sunny location where it can thrive.
- You are experienced with succulents and understand their watering needs.
- You don't have pets or small children who might be exposed to the toxic sap.
- You appreciate unique and sculptural plants.
❌ Skip This Plant If...
- You have pets or small children due to the plant's toxicity.
- You cannot provide adequate sunlight.
- You tend to overwater plants.
- You are looking for a plant that is easy to propagate without special precautions.
🎯 Quick Verdict
⚡ Key Differences Between These Plants
Lysimachia is rated Expert care level, while Pencil Cactus is Moderate.
Lysimachia has fast growth, while Pencil Cactus grows moderate.
💡 Pro Tips For Comparing These Plants
Lysimachia Care Tips
Creeping Jenny is relatively easy to care for outdoors, but it can be challenging indoors due to its high light requirements and potential for aggressive growth. It needs very bright light and well-draining soil. Overwatering is a common problem. Regular pruning is needed to control its spread.
- Provide bright, indirect light with some direct sun exposure.
- Water thoroughly when the top inch of soil feels dry, but avoid overwatering.
- Fertilize regularly during the growing season.
- Prune regularly to control its spread and maintain its shape.
- Monitor for pests and treat promptly.
Pencil Cactus Care Tips
Pencil Cactus requires bright light and infrequent watering. It is relatively easy to care for, but its toxic sap makes it unsuitable for homes with pets or small children. Indoor growth requires careful attention to light and watering to prevent etiolation and root rot.
- Provide at least 6 hours of direct sunlight daily.
- Allow the soil to dry out completely between waterings.
- Use a well-draining succulent mix to prevent root rot.
- Wear gloves and eye protection when handling the plant to avoid contact with the toxic sap.
- Avoid over-fertilizing, as this can lead to leggy growth.
⚠️ Common Problems & Solutions — Plant Care Comparison
Lysimachia
Pencil Cactus
❓ Frequently Asked Questions — Comparing These Plants
Lysimachia
What are the light requirements for Lysimachia?
Lysimachia prefers partial to full sunlight, though the specific light needs vary depending on the species. Generally, plants need at least 4-6 hours of direct sunlight per day to thrive and produce abundant blooms. In hotter climates, providing some afternoon shade can prevent leaf scorch. Insufficient light can result in leggy growth, reduced flowering, and pale foliage.
How do I care for Lysimachia?
Lysimachia thrives in moist, well-draining soil. Water regularly, especially during dry periods, but avoid overwatering to prevent root rot. Plant in a location that receives partial to full sunlight, depending on the specific species. Fertilize monthly during the growing season (spring and summer) with a balanced liquid fertilizer to encourage blooming. Prune regularly to maintain shape and remove any dead or damaged foliage.
How do I propagate Lysimachia?
Lysimachia can be propagated easily through division, stem cuttings, and, in some species, keikis.
Pencil Cactus
What are the light requirements for Pencil Cactus?
Pencil Cactus thrives in bright, direct sunlight. Aim for at least 6 hours of direct sunlight per day. Insufficient light can cause etiolation, resulting in weak, pale growth. An east- or south-facing window is ideal. If natural light is limited, supplement with a grow light. Rotate the plant regularly to ensure even light exposure on all sides.
How do I care for Pencil Cactus?
Pencil Cactus is a relatively easy-to-care-for succulent, thriving on neglect and bright light. Plant in well-draining cactus mix. Water sparingly, allowing the soil to dry out completely between waterings, especially during winter dormancy. Provide at least 6 hours of direct sunlight daily.
How do I propagate Pencil Cactus?
Pencil Cactus can be easily propagated through stem cuttings. Allow the cut end to callus over for several days before planting in well-draining cactus mix. Keep the soil slightly moist until roots develop. Propagation from offsets is also possible; simply detach the offset and plant it in well-draining soil. Seed propagation is more challenging and requires patience. Grafting is less common but can be used to propagate difficult-to-root varieties. Always wear gloves when handling cuttings due to the irritating sap. Allow the cutting to dry and form a callous before planting in soil. Protect from excessive sun while rooting. Rooting hormone can be used, but is not necessary.
Last updated: April 25, 2026 — Plant care data reviewed and verified by our editorial team.