Black Locust vs Lovage Plant Comparison
Compare these two plants side by side — care needs, key differences, and which is right for your home.
Black Locust
Robinia pseudoacacia
Black Locust is a fast-growing, deciduous tree typically reaching 30-80 feet in height. It features pinnately compound leaves with oval leaflets and fragrant, white, pea-like flowers in drooping clusters in late spring. The bark is deeply furrowed and dark brown. It is primarily an outdoor tree, valued for its rapid growth, nitrogen-fixing capabilities, and durable wood. While attractive, it's not suitable for indoor cultivation due to its size and light requirements. People grow it for erosion control, honey production, and as a source of firewood.
Lovage
Levisticum officinale
Lovage is a tall, herbaceous perennial plant typically grown outdoors for its leaves, stems, and roots, all of which have a celery-like flavor. It can reach heights of 1.8 to 2.5 meters (6 to 8 feet). The plant features glossy, dark green leaves that are divided into leaflets. It produces umbels of yellowish-green flowers in the summer, followed by aromatic seeds. People grow lovage for culinary and medicinal purposes. It is primarily an outdoor plant and presents challenges when grown indoors due to its size and light requirements.
Quick Plant Comparison
| Feature | Black Locust | Lovage |
|---|---|---|
| Light | Full sun (at least 6 hours of direct sunlight per day) | Full sun to partial shade. Requires at least 6 hours of direct sunlight daily for optimal growth. |
| Watering | Once a week during the first year, then as needed during prolonged dry periods | Every 7-10 days outdoors, less frequently if container-grown. |
| Humidity | 30-50% | 30-50% |
| Temperature | 10-30°C | 15-24°C |
| Care Level | Expert | Expert |
| Growth Rate | Fast | Fast |
| Max Height | N/A (Outdoor tree, not suitable for indoor growing) | 0.6-1.2 meters (2-4 feet) indoors, significantly larger outdoors. |
| Pet Safety | ❌ Toxic To Pets | ❌ Toxic To Pets |
| Soil | Well-drained soil; adaptable to various soil types, including poor and sandy soils | Well-draining, fertile soil rich in organic matter. A mix of potting soil, compost, and perlite is suitable. |
| Beginner Friendly | ❌ No | ❌ No |
| Weekly Maintenance | 30 minutes monthly (primarily for pruning and sucker removal) | 30 minutes weekly |
🔬 Botanical Information — Comparing These Plants
Black Locust
| Scientific Name | Robinia pseudoacacia |
|---|---|
| Family | Fabaceae |
| Native To | Eastern United States |
| Also Known As | Black Locust, False Acacia, Yellow Locust |
| Leaves | Pinnately compound leaves with 7-21 oval leaflets. Leaflets are smooth-edged and approximately 1-2 inches long. The leaves are light green in spring and summer, turning yellow in the fall. |
| Flowers | Rarely, if ever, flowers indoors. Outdoors, it produces fragrant, white, pea-like flowers in drooping clusters in late spring. |
Lovage
| Scientific Name | Levisticum officinale |
|---|---|
| Family | Apiaceae |
| Native To | Southern Europe and Southwestern Asia |
| Also Known As | Lovage, Garden Lovage, Maggi Plant |
| Leaves | Glossy, dark green leaves that are divided into leaflets. The leaflets are serrated and have a celery-like aroma when crushed. The leaves can grow up to 30 cm (12 inches) long. |
| Flowers | Produces umbels of yellowish-green flowers in the summer. Flowering is less common indoors, but possible with sufficient light. |
📏 Size & Growth — Plant Comparison
Black Locust
Lovage
🌱 Propagation — Comparing Plant Growth
Black Locust
Methods: Seed, Root cuttings, Suckers
Difficulty: Moderate
Tips: Seeds require scarification and stratification before sowing. Root cuttings should be taken in late winter or early spring. Suckers can be transplanted in the fall or spring.
Lovage
Methods: Seed, Division, Root cuttings
Difficulty: Moderate
Tips: For seeds, cold stratify for a few weeks before sowing. Division is best done in spring or fall. Ensure each division has healthy roots and shoots. Root cuttings should be taken in late fall or early spring.
✨ Benefits & Features — Comparing Plant Value
Black Locust
Black Locust is known for its rapid growth, nitrogen-fixing capabilities, and highly durable wood. Its fragrant, white flowers attract pollinators, but its invasive tendencies and toxicity to pets are important considerations.
- ✓ Erosion control
- ✓ Nitrogen fixation in soil
- ✓ Attracts pollinators
- ✓ Provides durable wood
- ✓ Fast growth
- ⚠️ Toxic to pets
Lovage
Lovage has a strong celery-like flavor that is more intense than celery itself. It is a tall, imposing plant that can add vertical interest to a garden. The entire plant is edible and has various culinary and medicinal uses.
- ✓ Provides fresh herbs for cooking.
- ✓ Attracts beneficial insects to the garden.
- ✓ Adds a unique flavor to dishes.
- ✓ Can be used medicinally for digestive issues.
- ✓ Aesthetically pleasing in a garden setting.
- ⚠️ Toxic to pets
📅 Maintenance Schedule — Plant Care Comparison
Black Locust
Lovage
🌞 Light Requirements
Black Locust
Full sun (at least 6 hours of direct sunlight per day)
Low light tolerant: ❌ No
Lovage
Full sun to partial shade. Requires at least 6 hours of direct sunlight daily for optimal growth.
Low light tolerant: ❌ No
💧 Watering Needs
Black Locust
Water deeply when the soil is dry to the touch, especially during the first few years after planting. Established trees are drought-tolerant. Overwatering can lead to root rot, indicated by yellowing leaves and wilting. Underwatering results in leaf drop and stunted growth.
Lovage
Water deeply when the top inch of soil feels dry to the touch. Avoid overwatering, which can lead to root rot. Ensure good drainage. Signs of underwatering include wilting leaves; signs of overwatering include yellowing leaves and a soggy soil.
🌡️ Temperature & Humidity
Black Locust
Temperature: 10-30°C
Humidity: 30-50%
Lovage
Temperature: 15-24°C
Humidity: 30-50%
🤔 Which Plant Is Right For You?
Black Locust
Robinia pseudoacaciaLandowners seeking a fast-growing tree for erosion control, honey production, or firewood in a large outdoor space.
✅ Choose This Plant If...
- You need a fast-growing tree for erosion control.
- You want to attract pollinators to your yard.
- You need a source of durable wood.
- You have a large property where invasive spread is not a concern.
- You want a tree that can thrive in poor soil conditions.
❌ Skip This Plant If...
- You have a small yard and are concerned about invasive spread.
- You have pets that may ingest toxic plant parts.
- You live in an area where Black Locust is considered an invasive species.
- You are looking for an indoor plant.
- You need a shade tree.
Lovage
Levisticum officinaleExperienced gardeners who want a flavorful herb for culinary use and have ample outdoor space.
✅ Choose This Plant If...
- You want a strong celery-like flavor in your cooking.
- You have a large outdoor garden space.
- You enjoy growing herbs for both culinary and medicinal purposes.
- You are an experienced gardener looking for a unique plant.
- You want to attract beneficial insects to your garden.
❌ Skip This Plant If...
- You have limited space, especially indoors.
- You have pets that might ingest the plant.
- You are a beginner gardener looking for an easy-to-grow plant.
🎯 Quick Verdict
⚡ Key Differences Between These Plants
Both plants have similar basic care requirements but differ in appearance and specific needs. Compare plants carefully to find the best fit for your space.
💡 Pro Tips For Comparing These Plants
Black Locust Care Tips
Black Locust is an outdoor tree that requires full sun and well-drained soil. It is not suitable for indoor cultivation. It is relatively low-maintenance once established but can be invasive due to its suckering habit. Toxicity to pets is a significant concern.
- Plant in full sun for optimal growth.
- Water deeply during the first year to establish a strong root system.
- Control suckers regularly to prevent invasive spread.
- Prune in late winter or early spring.
- Monitor for insect pests and diseases.
Lovage Care Tips
Lovage is primarily an outdoor plant that requires full sun and well-drained soil. Growing it indoors is challenging due to its size and light requirements. It needs a large container and supplemental lighting to thrive. Regular fertilization and monitoring for pests are essential.
- Provide full sun for optimal growth and flavor.
- Water deeply but infrequently, allowing the soil to dry out slightly between waterings.
- Fertilize regularly during the growing season.
- Monitor for pests and diseases, and treat promptly.
- Prune regularly to maintain shape and encourage bushier growth.
⚠️ Common Problems & Solutions — Plant Care Comparison
Black Locust
Lovage
❓ Frequently Asked Questions — Comparing These Plants
Black Locust
What are the light requirements for Black Locust?
Black Locust thrives in bright, indirect light. Insufficient light can lead to leggy growth and reduced flowering. Place your plant near a south- or east-facing window, but shield it from intense midday sun with a sheer curtain. Rotate the plant regularly to ensure all sides receive adequate light. Observe the leaves; if they appear pale or elongated, it may indicate a need for more light. Supplement with grow lights if natural light is limited, especially during winter months. Adequate light is crucial for healthy growth and overall vigor.
How do I care for Black Locust?
Indoor Black Locust requires bright, indirect light; direct sunlight can scorch leaves. Water thoroughly when the top inch of soil is dry, ensuring good drainage to prevent root rot. Use a well-draining potting mix and a pot appropriate for its size. Fertilize monthly during the growing season (spring/summer) with a balanced liquid fertilizer diluted to half strength. Prune regularly to maintain desired shape and size, removing any dead or crossing branches. Maintain stable temperatures and avoid drafts. Monitor for pests like spider mites or aphids and treat promptly. Repot every 1-2 years as needed. Provide adequate humidity, especially in dry indoor environments. Rotate the plant regularly for even growth.
How do I propagate Black Locust?
Black Locust can be propagated through stem cuttings or air layering. For stem cuttings, take a 4-6 inch cutting from new growth, removing the lower leaves. Dip the cut end in rooting hormone and plant in a well-draining potting mix. Keep the soil moist and provide high humidity. Roots should develop in 4-6 weeks. For air layering, make a shallow cut in a stem, wrap it with moist sphagnum moss, and cover with plastic wrap. Secure the wrap tightly. Roots should develop within a few months. Once roots are visible, cut the stem below the rooted section and pot it.
Lovage
What are the light requirements for Lovage?
Lovage performs best in full sun to partial shade. Ideally, it should receive at least six hours of direct sunlight per day to promote vigorous growth and abundant blooms. In hotter climates, afternoon shade is beneficial to prevent leaf scorch. When grown indoors, place Lovage near a sunny window, such as a south- or west-facing window. If natural light is insufficient, supplement with grow lights to ensure adequate light exposure. Rotate the plant regularly to ensure even light distribution and prevent it from leaning towards the light source. Insufficient light can lead to leggy growth and reduced flowering.
How do I care for Lovage?
Lovage thrives in well-drained soil and prefers a sunny to partially shaded location. Water deeply and regularly, especially during dry periods, ensuring the soil remains consistently moist but not waterlogged. Fertilize in early spring with a balanced, slow-release fertilizer to promote healthy growth and abundant blooms. Deadhead spent flowers to encourage further blooming and prevent self-seeding, unless you desire new plants. Prune back the plant in late fall after the foliage has died back to prepare it for winter dormancy. Provide support if the plant becomes too tall or top-heavy, especially in windy areas. Monitor for pests and diseases, and address any issues promptly. Mulch around the base of the plant to retain moisture and suppress weeds.
How do I propagate Lovage?
Lovage can be propagated through several methods: division, stem cuttings, and seed. Division is best done in spring or fall. Carefully dig up the plant and divide the root ball into smaller sections, ensuring each section has healthy roots and shoots. Replant the divisions in well-draining soil. Stem cuttings can be taken in spring or summer. Take a 4-6 inch cutting from a healthy stem, remove the lower leaves, and plant in a well-draining potting mix. Keep the soil moist until roots develop. Seeds can be sown directly into the garden in spring or fall. Keep the soil moist and provide adequate light. Germination can take several weeks.
Last updated: May 11, 2026 — Plant care data reviewed and verified by our editorial team.