Creeping Jenny vs Flax Plant Comparison
Compare these two plants side by side — care needs, key differences, and which is right for your home.
Creeping Jenny
Lysimachia nummularia
Creeping Jenny (Lysimachia nummularia) is a perennial ground cover known for its trailing stems and round, coin-like leaves. It's primarily an outdoor plant, often used in gardens as a ground cover, in hanging baskets, or cascading over walls. While it can be grown indoors, it requires specific conditions to thrive and may not be as vigorous as when grown outdoors. People grow it for its attractive foliage and ability to quickly cover ground.
Flax
Linum usitatissimum
Linum usitatissimum, commonly known as flax or linseed, is an annual plant cultivated for its fiber and seeds. It grows to about 1.2 meters tall, with slender stems and narrow, lance-shaped leaves. The plant produces delicate, light blue flowers that bloom for a short period. Flax is primarily grown outdoors in agricultural settings for the production of linen fiber from the stem and linseed oil from the seeds. While it can be grown indoors, it requires very bright light and careful attention to humidity and watering, making it challenging.
Quick Plant Comparison
| Feature | Creeping Jenny | Flax |
|---|---|---|
| Light | Bright, indirect light to full sun outdoors. Indoors, provide bright indirect light, ideally near a south- or west-facing window. | Full sun (at least 6-8 hours of direct sunlight daily) |
| Watering | Every 3-7 days, depending on light and temperature | Every 3-7 days, depending on environmental conditions and pot size. |
| Humidity | 40-60% | 40-60% |
| Temperature | 18-24°C | 15-24°C |
| Care Level | Expert | Expert |
| Growth Rate | Fast | Moderate |
| Max Height | 2-10 cm (indoors) | 0.3-0.6 meters (indoors, typically smaller than outdoor plants) |
| Pet Safety | ❌ Toxic To Pets | ❌ Toxic To Pets |
| Soil | Well-draining potting mix, such as a mix of peat moss, perlite, and vermiculite. | Well-draining, loamy soil with a slightly acidic to neutral pH (6.0-7.0) |
| Beginner Friendly | With Caution | ❌ No |
| Weekly Maintenance | 10 minutes weekly | 30 minutes weekly |
🔬 Botanical Information — Comparing These Plants
Creeping Jenny
| Scientific Name | Lysimachia nummularia |
|---|---|
| Family | Primulaceae |
| Native To | Europe |
| Also Known As | Creeping Jenny, Moneywort, Twopenny Grass |
| Leaves | The leaves are small, round, and coin-like, typically 1-2 cm in diameter. They are usually bright green, but some varieties have golden or variegated foliage. The texture is smooth and slightly succulent. |
| Flowers | It rarely flowers indoors. When it does, it produces small, yellow, cup-shaped flowers in the summer. |
Flax
| Scientific Name | Linum usitatissimum |
|---|---|
| Family | Linaceae |
| Native To | Native to the Eastern Mediterranean region and Western Asia |
| Also Known As | Common Flax, Linseed |
| Leaves | The leaves are narrow, lance-shaped, and typically a light green color. They are arranged alternately along the stem and are relatively small, usually less than 2.5 cm long. |
| Flowers | Flax produces delicate, light blue flowers that are about 2-3 cm in diameter. They bloom for a short period, typically in the morning, and close in the afternoon. Flowering is less common indoors. |
📏 Size & Growth — Plant Comparison
Creeping Jenny
Flax
🌱 Propagation — Comparing Plant Growth
Creeping Jenny
Methods: Stem cuttings, Division
Difficulty: Easy
Tips: Take stem cuttings in spring or summer and root them in water or directly in moist soil. Division can be done in spring or fall by separating the rhizomes.
Flax
Methods: Seed
Difficulty: Easy
Tips: Sow seeds directly into well-draining soil in spring. Keep the soil consistently moist until germination occurs. Provide plenty of sunlight.
✨ Benefits & Features — Comparing Plant Value
Creeping Jenny
Creeping Jenny is known for its rapid growth and trailing habit, making it a popular choice for ground cover and hanging baskets. Its small, round leaves give it a unique and attractive appearance. It is also relatively easy to propagate from stem cuttings.
- ✓ Adds visual interest to indoor spaces with its trailing habit.
- ✓ Can be easily propagated to create more plants.
- ✓ Provides a touch of greenery to brighten up a room.
- ✓ Relatively easy to care for once its needs are understood.
- ✓ Can be used in various container arrangements.
- ⚠️ Toxic to pets
Flax
Flax is an annual plant primarily grown for its fiber and seeds, making it unique among common houseplants. Its delicate blue flowers are short-lived but add to its aesthetic appeal.
- ✓ Provides a unique aesthetic with its delicate blue flowers.
- ✓ Offers a connection to historical agricultural practices.
- ✓ Can be a rewarding challenge for experienced gardeners.
- ✓ The seeds are a source of omega-3 fatty acids (though not for pets due to toxicity).
- ✓ Can be used as a learning experience to understand plant growth requirements.
- ⚠️ Toxic to pets
📅 Maintenance Schedule — Plant Care Comparison
Creeping Jenny
Flax
🌞 Light Requirements
Creeping Jenny
Bright, indirect light to full sun outdoors. Indoors, provide bright indirect light, ideally near a south- or west-facing window.
Low light tolerant: ❌ No
Flax
Full sun (at least 6-8 hours of direct sunlight daily)
Low light tolerant: ❌ No
💧 Watering Needs
Creeping Jenny
Keep the soil consistently moist, but not waterlogged. Allow the top inch of soil to dry out slightly between waterings. Overwatering can lead to root rot, while underwatering will cause the leaves to wilt and turn brown. Ensure good drainage.
Flax
Water thoroughly when the top inch of soil feels dry. Avoid overwatering, which can lead to root rot. Ensure good drainage. Signs of underwatering include wilting and dry, crispy leaves. Overwatering can cause yellowing leaves and a soggy soil.
🌡️ Temperature & Humidity
Creeping Jenny
Temperature: 18-24°C
Humidity: 40-60%
Flax
Temperature: 15-24°C
Humidity: 40-60%
🤔 Which Plant Is Right For You?
Creeping Jenny
Lysimachia nummulariaExperienced plant owners looking for a trailing plant to add to a bright indoor space or outdoor container.
✅ Choose This Plant If...
- You want a trailing plant for a hanging basket or container arrangement.
- You have a bright indoor space where it can receive ample light.
- You enjoy the look of its small, round, coin-like leaves.
- You are an experienced plant owner who can provide the necessary care.
- You want a plant that is easy to propagate.
❌ Skip This Plant If...
- You have pets that may ingest the plant.
- You cannot provide bright, indirect light indoors.
- You are a beginner plant owner looking for a low-maintenance plant.
Flax
Linum usitatissimumExperienced gardeners who want to try growing a traditionally outdoor plant indoors and are aware of the challenges and toxicity to pets.
✅ Choose This Plant If...
- You are an experienced gardener looking for a challenge.
- You want to try growing a plant typically grown outdoors.
- You have a very sunny location indoors or can provide supplemental lighting.
- You are interested in the historical significance of flax.
- You are willing to take precautions to keep pets away from the plant.
❌ Skip This Plant If...
- You are a beginner gardener.
- You have pets that may ingest plants.
- You cannot provide adequate sunlight.
- You are looking for a low-maintenance houseplant.
🎯 Quick Verdict
⚡ Key Differences Between These Plants
Creeping Jenny has fast growth, while Flax grows moderate.
💡 Pro Tips For Comparing These Plants
Creeping Jenny Care Tips
Creeping Jenny is relatively easy to grow outdoors, but requires more attention indoors. Providing adequate light and consistent moisture are crucial. It can become leggy and less vibrant indoors without sufficient light. Regular pruning is needed to maintain its shape and prevent it from becoming too invasive.
- Provide bright, indirect light to prevent leggy growth.
- Water thoroughly when the top inch of soil is dry.
- Fertilize regularly during the growing season.
- Prune regularly to maintain shape and encourage bushier growth.
- Monitor for pests and treat promptly.
Flax Care Tips
Flax is primarily an outdoor plant and requires very specific conditions to thrive indoors. It needs intense sunlight, well-draining soil, and careful watering to prevent root rot. Maintaining adequate humidity can also be challenging indoors. It is toxic to pets.
- Provide at least 6-8 hours of direct sunlight daily, supplementing with grow lights if necessary.
- Use well-draining soil and avoid overwatering to prevent root rot.
- Monitor for pests like aphids and treat promptly.
- Ensure adequate ventilation to prevent fungal diseases.
- Be vigilant about keeping pets away from the plant to prevent ingestion.
⚠️ Common Problems & Solutions — Plant Care Comparison
Creeping Jenny
Flax
❓ Frequently Asked Questions — Comparing These Plants
Creeping Jenny
What are the light requirements for Creeping Jenny?
Creeping Jenny prefers bright, indirect light, but it can tolerate partial shade. In brighter light, the foliage will be more vibrant and the growth will be more vigorous. Avoid direct sunlight, especially during the hottest part of the day, as it can scorch the leaves. An east-facing window is ideal, but a north- or west-facing window can also work, as long as the plant receives sufficient light.
How do I care for Creeping Jenny?
Creeping Jenny thrives in bright, indirect light but can tolerate some shade. Water when the top inch of soil feels dry to the touch, avoiding overwatering which can lead to root rot. Well-draining soil is crucial. Fertilize monthly during the growing season (spring and summer) with a balanced liquid fertilizer diluted to half strength. Prune regularly to maintain desired shape and encourage bushier growth.
How do I propagate Creeping Jenny?
Creeping Jenny is easily propagated through stem cuttings or layering. For stem cuttings, take a 4-6 inch cutting from a healthy stem, removing the lower leaves. Place the cutting in water or directly into moist potting mix. Roots should develop within a few weeks.
Flax
What are the light requirements for Flax?
Flax requires ample sunlight to thrive and produce abundant blooms. Ideally, provide at least six hours of direct sunlight per day. A south-facing window is an excellent location for indoor Flax plants. If direct sunlight is limited, supplement with artificial grow lights. Insufficient light can lead to leggy growth, reduced flowering, and pale foliage. Observe your plant closely; if the stems are stretching towards the light, it indicates a need for increased light exposure. Rotate the plant regularly to ensure even light distribution and prevent lopsided growth. During the hottest part of the day, especially in summer, some afternoon shade may be beneficial to prevent scorching of the leaves. Proper light exposure is crucial for the overall health and vigor of your Flax plant.
How do I care for Flax?
Flax thrives with regular attention to a few key factors. Provide at least six hours of direct sunlight daily. Water thoroughly when the top inch of soil feels dry, ensuring good drainage to prevent root rot. Fertilize every 2-4 weeks during the growing season (spring and summer) with a balanced liquid fertilizer, diluted to half strength, to encourage abundant blooms. Deadhead spent flowers to prolong the blooming period. Flax prefers well-draining soil, such as a sandy loam. Maintain moderate humidity levels. In hotter climates, provide some afternoon shade to prevent scorching. During the dormant season (fall and winter), reduce watering and cease fertilization. Monitor for pests and diseases, addressing any issues promptly. Prune lightly after flowering to maintain shape and encourage bushier growth. With proper care, Flax will reward you with a stunning display of flowers.
How do I propagate Flax?
Flax can be propagated through seeds, division, or stem cuttings. For seeds, sow them directly into well-draining soil in spring or fall. Keep the soil moist until germination. For division, carefully separate clumps of the plant in spring or fall and replant them. For stem cuttings, take 4-6 inch cuttings from healthy stems, remove the lower leaves, and plant them in moist potting mix. Keep the cuttings in a humid environment until they root, which typically takes several weeks. Rooting hormone can be used to enhance the success rate. Ensure the cuttings receive bright, indirect light. Once rooted, transplant them into individual pots. With proper care, the new plants will thrive. Flax is relatively easy to propagate, making it a rewarding experience for gardeners.
Last updated: May 15, 2026 — Plant care data reviewed and verified by our editorial team.