Four O'Clock vs Lungwort Plant Comparison
Compare these two plants side by side — care needs, key differences, and which is right for your home.
Four O'Clock
Mirabilis jalapa
Mirabilis jalapa, commonly known as the Four O'Clock flower, is a bushy, herbaceous perennial typically grown as an annual in cooler climates. It's known for its trumpet-shaped flowers that open in the late afternoon or early evening, releasing a sweet fragrance. The flowers come in a variety of colors, including pink, red, yellow, white, and multicolored variations. It grows from tuberous roots and can reach a height of 1-3 feet. It is primarily grown outdoors in gardens and borders for its vibrant colors and evening fragrance. It is not ideally suited as an indoor plant.
Lungwort
Pulmonaria officinalis
Pulmonaria officinalis, commonly known as Lungwort, is a herbaceous perennial native to Europe. It's characterized by its distinctive spotted leaves, which are typically green with white or silver blotches. The plant forms a low-growing clump and produces clusters of small, bell-shaped flowers that change color from pink to blue as they mature. Lungwort is primarily grown as an ornamental plant in gardens for its attractive foliage and early spring blooms. It is NOT naturally an indoor plant and will struggle without proper conditions.
Quick Plant Comparison
| Feature | Four O'Clock | Lungwort |
|---|---|---|
| Light | Full sun to partial shade | Partial shade to full shade. Avoid direct sunlight, especially during the hottest part of the day. |
| Watering | Every 3-7 days depending on weather and soil drainage | Every 3-5 days, depending on weather and soil drainage |
| Humidity | 40-60% | 40-60% |
| Temperature | 18-27°C | 10-21°C |
| Care Level | Expert | Expert |
| Growth Rate | Fast | Moderate |
| Max Height | 0.3-1 meter (indoors unlikely to reach this height) | 0.3-0.6 meters (indoors unlikely to reach this) |
| Pet Safety | ❌ Toxic To Pets | ❌ Toxic To Pets |
| Soil | Well-draining soil, such as a mix of garden soil, sand, and compost | Well-draining, humus-rich soil with a slightly acidic to neutral pH |
| Beginner Friendly | ❌ No | ❌ No |
| Weekly Maintenance | 15 minutes weekly | 15 minutes weekly (outdoor) |
🔬 Botanical Information — Comparing These Plants
Four O'Clock
| Scientific Name | Mirabilis jalapa |
|---|---|
| Family | Nyctaginaceae |
| Native To | Tropical South America |
| Also Known As | Four O'Clock Flower, Marvel of Peru, Beauty-of-the-Night |
| Leaves | The leaves are ovate to lance-shaped, typically 2-4 inches long, and have a smooth texture. They are usually medium green in color and arranged oppositely along the stems. |
| Flowers | Flowers are trumpet-shaped, about 1-2 inches long, and come in a variety of colors including pink, red, yellow, white, and multicolored. They open in the late afternoon or early evening and emit a sweet fragrance. Flowering indoors is rare and unlikely. |
Lungwort
| Scientific Name | Pulmonaria officinalis |
|---|---|
| Family | Boraginaceae |
| Native To | Europe |
| Also Known As | Lungwort, Common Lungwort, Jerusalem Cowslip, Spotted Dog |
| Leaves | The leaves of Lungwort are ovate to lance-shaped, typically 10-25 cm long, and have a rough texture. They are characteristically green with white or silver spots, which vary in size and distribution depending on the cultivar. The spots are caused by air pockets within the leaf tissue. |
| Flowers | Lungwort flowers in early spring. The flowers are small, bell-shaped, and borne in clusters. They start as pink or reddish-purple buds and gradually change to blue or violet as they mature. This color change is due to changes in pH levels within the petals. |
📏 Size & Growth — Plant Comparison
Four O'Clock
Lungwort
🌱 Propagation — Comparing Plant Growth
Four O'Clock
Methods: Seed, Tuber division
Difficulty: Easy
Tips: Sow seeds directly in the garden after the last frost or start them indoors 6-8 weeks before. Divide tubers in early spring.
Lungwort
Methods: Division, Seed, Root cuttings
Difficulty: Easy
Tips: Divide established clumps in early spring or fall. Sow seeds in a cold frame in autumn. Root cuttings can be taken in late winter.
✨ Benefits & Features — Comparing Plant Value
Four O'Clock
The flowers open in the late afternoon or early evening, hence the name 'Four O'Clock'. They are known for their sweet fragrance and the ability to produce multiple colors on the same plant, sometimes even on the same flower.
- ✓ Adds vibrant color to the garden
- ✓ Provides a sweet evening fragrance
- ✓ Attracts pollinators
- ✓ Relatively low-maintenance once established
- ✓ Can self-seed and naturalize in suitable climates
- ⚠️ Toxic to pets
Lungwort
Lungwort is unique due to its spotted leaves and flowers that change color from pink to blue as they mature. This color change is a result of pH changes within the flower petals. The plant's historical use in herbal medicine also adds to its unique appeal.
- ✓ Attracts pollinators to the garden
- ✓ Provides early spring blooms
- ✓ Adds visual interest with unique foliage
- ✓ Deer resistant
- ✓ Thrives in shady areas
- ⚠️ Toxic to pets
📅 Maintenance Schedule — Plant Care Comparison
Four O'Clock
Lungwort
🌞 Light Requirements
Four O'Clock
Full sun to partial shade
Low light tolerant: ❌ No
Lungwort
Partial shade to full shade. Avoid direct sunlight, especially during the hottest part of the day.
Low light tolerant: ❌ No
💧 Watering Needs
Four O'Clock
Water deeply when the top inch of soil feels dry. Avoid overwatering, which can lead to root rot. During hot summer months, more frequent watering may be necessary. Reduce watering in cooler months.
Lungwort
Keep the soil consistently moist, but not waterlogged. Water when the top inch of soil feels dry to the touch. Overwatering can lead to root rot, while underwatering can cause the leaves to wilt and brown.
🌡️ Temperature & Humidity
Four O'Clock
Temperature: 18-27°C
Humidity: 40-60%
Lungwort
Temperature: 10-21°C
Humidity: 40-60%
🤔 Which Plant Is Right For You?
Four O'Clock
Mirabilis jalapaGardeners looking for a fragrant, colorful addition to their evening garden.
✅ Choose This Plant If...
- You want a fragrant evening garden
- You enjoy vibrant, multicolored flowers
- You want a plant that attracts pollinators like moths and hummingbirds
- You are looking for a low-maintenance outdoor plant once established
- You want a plant that can self-seed and return year after year.
❌ Skip This Plant If...
- You have pets that may ingest the plant
- You lack a sunny outdoor space
- You want a plant that thrives indoors.
Lungwort
Pulmonaria officinalisExperienced gardeners in cooler climates looking for a shade-loving, early-blooming perennial for their garden.
✅ Choose This Plant If...
- You want a plant with unique spotted foliage that adds visual interest to a shady area.
- You desire a plant that attracts pollinators to your garden early in the season.
- You appreciate flowers that change color as they mature.
- You are looking for a deer-resistant perennial.
- You have a cool, moist garden environment that mimics its natural habitat.
❌ Skip This Plant If...
- You have pets that may ingest the plant, as it is toxic to them.
- You live in a hot, dry climate with intense sunlight.
- You are looking for a low-maintenance indoor plant, as this plant is difficult to grow indoors.
🎯 Quick Verdict
⚡ Key Differences Between These Plants
Four O'Clock has fast growth, while Lungwort grows moderate.
💡 Pro Tips For Comparing These Plants
Four O'Clock Care Tips
Four O'Clocks are primarily outdoor plants and require full sun to thrive. Growing them indoors is challenging due to their high light requirements and potential for pest infestations. They also spread via tuberous roots, which can quickly outgrow a container. Indoor flowering is unlikely.
- Plant in well-draining soil to prevent root rot.
- Provide full sun for best flowering.
- Deadhead spent flowers regularly to encourage more blooms.
- Protect from strong winds, which can damage the delicate stems.
- Monitor for pests like aphids and treat promptly.
Lungwort Care Tips
Lungwort is primarily an outdoor plant that requires specific conditions to thrive. Indoor cultivation is challenging due to the need for consistent moisture, cool temperatures, and high humidity. It is prone to fungal diseases and root rot if not properly cared for indoors. Requires dormancy period.
- Provide consistent moisture, especially during dry periods.
- Protect from direct sunlight to prevent leaf scorch.
- Mulch around the base of the plant to retain moisture and suppress weeds.
- Divide established clumps every few years to maintain vigor.
- Monitor for slugs and snails and take appropriate action.
⚠️ Common Problems & Solutions — Plant Care Comparison
Four O'Clock
Lungwort
❓ Frequently Asked Questions — Comparing These Plants
Four O'Clock
What are the light requirements for Four O'Clock?
Four O’Clocks thrive in full sun, needing at least 6 hours of direct sunlight daily to produce abundant blooms. A sunny location encourages strong growth and vibrant flower colors. While they can tolerate partial shade, reduced sunlight will result in fewer flowers and leggier growth.
How do I care for Four O'Clock?
Four O’Clocks are relatively easy to care for. Plant them in well-draining soil in a location that receives at least 6 hours of sunlight daily for optimal blooming. Water regularly, especially during dry periods, but avoid overwatering, which can lead to root rot. Fertilize monthly during the growing season with a balanced fertilizer or one formulated for blooming plants to encourage abundant flowering.
How do I propagate Four O'Clock?
Four O’Clocks can be propagated through seeds, tubers, or stem cuttings.
Lungwort
What are the light requirements for Lungwort?
Lungwort thrives in partial to full shade. Direct sunlight can scorch the leaves, especially during the hottest part of the day. Ideally, provide morning sun and afternoon shade, or dappled sunlight throughout the day. When planting Lungwort, consider its light requirements in relation to other plants in your garden. Avoid planting it in areas that receive intense, direct sunlight for extended periods. If growing Lungwort indoors, place it near a north-facing window or in a location with filtered light. Insufficient light can result in leggy growth and reduced flowering.
How do I care for Lungwort?
Lungwort prefers partial to full shade and well-drained, humus-rich soil. Water regularly, especially during dry periods, keeping the soil consistently moist but not soggy. Fertilize in early spring with a balanced fertilizer to promote healthy growth and abundant blooms. Avoid over-fertilizing, as this can lead to excessive foliage growth at the expense of flowers. Mulch around the plant to retain moisture and suppress weeds. Deadhead spent flowers to encourage further blooming and prevent self-seeding. Divide established plants every few years to maintain vigor and prevent overcrowding. Monitor for pests such as slugs and snails, and take appropriate action if necessary. Provide good air circulation to prevent fungal diseases.
How do I propagate Lungwort?
Lungwort can be propagated by division, stem cuttings, or root cuttings.
Last updated: April 20, 2026 — Plant care data reviewed and verified by our editorial team.