Larkspur Delphinium vs Night Blooming Jasmine Plant Comparison
Compare these two plants side by side — care needs, key differences, and which is right for your home.
Larkspur Delphinium
Delphinium spp.
Larkspurs are annual or perennial herbaceous plants known for their tall, elegant flower spikes. They typically grow to heights of 1 to 6 feet, depending on the species and cultivar. The flowers come in a wide range of colors, including blue, purple, pink, white, and yellow. Larkspurs are primarily outdoor plants, prized for their striking vertical presence in gardens and borders. They are grown for their beautiful, showy flowers that attract pollinators.
Night Blooming Jasmine
Cestrum nocturnum
Cestrum nocturnum, commonly known as Night Blooming Jasmine, is a fast-growing evergreen shrub or small tree, typically reaching heights of 4-12 feet. It's primarily grown for its intensely fragrant flowers, which are most potent at night. The plant features slender, willow-like leaves and produces clusters of small, tubular, greenish-white flowers. While it can be grown in containers, it thrives outdoors in warm climates. People grow it for its intoxicating fragrance, which can fill an entire garden or neighborhood on warm evenings. It is not naturally an indoor plant and requires specific conditions to thrive inside.
Quick Plant Comparison
| Feature | Larkspur Delphinium | Night Blooming Jasmine |
|---|---|---|
| Light | Full sun | Full sun to partial shade. Requires at least 6 hours of direct sunlight daily for optimal flowering. |
| Watering | Every 3-7 days, depending on weather and soil drainage | Every 5-7 days during the growing season, less frequently in winter. |
| Humidity | 30-50% | 40-60% |
| Temperature | 15-24°C | 18-27°C |
| Care Level | Expert | Expert |
| Growth Rate | Moderate | Fast |
| Max Height | Rarely grown indoors, outdoor height 0.3-1.8 meters | 1-2 meters (indoors, if successfully grown) |
| Pet Safety | ❌ Toxic To Pets | ❌ Toxic To Pets |
| Soil | Well-draining, fertile soil with a slightly acidic to neutral pH (6.0-7.0) | Well-draining potting mix amended with perlite or sand. |
| Beginner Friendly | ❌ No | ❌ No |
| Weekly Maintenance | 30 minutes weekly (weeding, watering, deadheading) | 30 minutes weekly |
🔬 Botanical Information — Comparing These Plants
Larkspur Delphinium
| Scientific Name | Delphinium spp. |
|---|---|
| Family | Ranunculaceae |
| Native To | Primarily Northern Hemisphere, including Europe, Asia, and North America |
| Also Known As | Larkspur, Delphinium |
| Leaves | The leaves are deeply lobed and finely divided, giving them a delicate, fern-like appearance. They are typically green or bluish-green in color and arranged alternately along the stem. |
| Flowers | Rarely flowers indoors. Outdoors, they produce tall spikes of spurred flowers in shades of blue, purple, pink, white, and yellow. The flowers bloom in summer. |
Night Blooming Jasmine
| Scientific Name | Cestrum nocturnum |
|---|---|
| Family | Solanaceae |
| Native To | West Indies |
| Also Known As | Night Blooming Jasmine, Night Jessamine, Lady of the Night, Queen of the Night |
| Leaves | The leaves are simple, alternate, lanceolate to ovate-lanceolate in shape, and typically 4-8 inches long. They are a glossy, medium green color with smooth margins and a slightly leathery texture. |
| Flowers | It rarely flowers indoors. Outdoors, it produces clusters of small, tubular, greenish-white flowers that are about 1 inch long. The flowers are highly fragrant, especially at night, and have a sweet, jasmine-like scent. |
📏 Size & Growth — Plant Comparison
Larkspur Delphinium
Night Blooming Jasmine
🌱 Propagation — Comparing Plant Growth
Larkspur Delphinium
Methods: Seed, Division
Difficulty: Moderate
Tips: For seeds, cold stratification is often required. Divide established plants in early spring or fall.
Night Blooming Jasmine
Methods: Stem cuttings, Seed
Difficulty: Easy
Tips: Take stem cuttings in spring or summer. Dip the cut end in rooting hormone and plant in moist potting mix. Keep the cutting warm and humid until roots develop.
✨ Benefits & Features — Comparing Plant Value
Larkspur Delphinium
Larkspurs are known for their tall, elegant flower spikes and vibrant colors. They are a classic cottage garden flower and a favorite of pollinators. Their toxicity makes them unsuitable for homes with pets or small children.
- ✓ Attracts pollinators to your garden.
- ✓ Adds vertical interest and vibrant colors to outdoor spaces.
- ✓ Provides cut flowers for bouquets.
- ✓ Can be used to create a classic cottage garden aesthetic.
- ✓ Offers a sense of accomplishment for experienced gardeners.
- ⚠️ Toxic to pets
Night Blooming Jasmine
Its most unique characteristic is its intensely fragrant flowers that bloom at night, releasing a powerful, sweet scent. Unlike many jasmine varieties, it is not a true jasmine (Jasminum species).
- ✓ Intense fragrance enhances outdoor spaces
- ✓ Attracts nocturnal pollinators
- ✓ Provides a lush, green backdrop
- ✓ Can be used to create a fragrant privacy screen
- ✓ Offers a sensory experience with its nighttime blooms
- ⚠️ Toxic to pets
📅 Maintenance Schedule — Plant Care Comparison
Larkspur Delphinium
Night Blooming Jasmine
🌞 Light Requirements
Larkspur Delphinium
Full sun
Low light tolerant: ❌ No
Night Blooming Jasmine
Full sun to partial shade. Requires at least 6 hours of direct sunlight daily for optimal flowering.
Low light tolerant: ❌ No
💧 Watering Needs
Larkspur Delphinium
Water deeply when the top inch of soil feels dry. Avoid overhead watering to prevent fungal diseases. Overwatering can lead to root rot, indicated by yellowing leaves and wilting. Underwatering results in dry, crispy leaves and stunted growth.
Night Blooming Jasmine
Water thoroughly when the top inch of soil is dry. Avoid overwatering, which can lead to root rot. Signs of underwatering include wilting leaves and dry soil. Overwatering signs include yellowing leaves and soggy soil.
🌡️ Temperature & Humidity
Larkspur Delphinium
Temperature: 15-24°C
Humidity: 30-50%
Night Blooming Jasmine
Temperature: 18-27°C
Humidity: 40-60%
🤔 Which Plant Is Right For You?
Larkspur Delphinium
Delphinium spp.Experienced gardeners looking to add vertical interest and vibrant colors to their outdoor flower beds.
✅ Choose This Plant If...
- You want tall, vibrant flowers in your garden.
- You want to attract pollinators to your yard.
- You have a sunny garden spot that needs a vertical accent.
- You enjoy the challenge of growing somewhat finicky plants.
- You appreciate classic cottage garden flowers.
❌ Skip This Plant If...
- You have pets or small children who might ingest the plant.
- You lack a sunny outdoor garden space.
- You are a beginner gardener looking for easy-to-grow plants.
Night Blooming Jasmine
Cestrum nocturnumExperienced gardeners in warm climates who want a fragrant plant for their outdoor space.
✅ Choose This Plant If...
- You desire an intensely fragrant garden plant, especially at night.
- You live in a warm climate where it can thrive outdoors year-round.
- You are an experienced gardener willing to provide the specific care it needs.
- You want to attract nocturnal pollinators to your garden.
- You have a large outdoor space where it can grow to its full potential.
❌ Skip This Plant If...
- You have pets or small children due to its toxicity.
- You live in a cold climate with harsh winters.
- You lack sufficient outdoor space for its growth.
- You are a beginner gardener.
- You are sensitive to strong fragrances.
🎯 Quick Verdict
⚡ Key Differences Between These Plants
Larkspur Delphinium has moderate growth, while Night Blooming Jasmine grows fast.
💡 Pro Tips For Comparing These Plants
Larkspur Delphinium Care Tips
Larkspurs are challenging to grow indoors due to their high light requirements and need for cool temperatures. They are best suited for outdoor gardens. Indoor attempts often result in weak, leggy growth and failure to flower. Proper drainage is crucial.
- Provide support for tall varieties to prevent them from falling over.
- Ensure well-draining soil to prevent root rot.
- Deadhead spent flowers regularly to encourage more blooms.
- Protect from strong winds that can damage the flower spikes.
- Monitor for pests and diseases and treat promptly.
Night Blooming Jasmine Care Tips
Night Blooming Jasmine is primarily an outdoor plant. Indoor cultivation is challenging due to its high light and humidity requirements. It needs very bright light and consistent moisture. Regular pruning is essential to maintain its shape. Due to its toxicity, it should be kept away from pets and children.
- Provide ample sunlight for optimal flowering.
- Water deeply but allow the soil to dry slightly between waterings.
- Fertilize regularly during the growing season.
- Prune after flowering to maintain shape and encourage new growth.
- Protect from frost in colder climates.
⚠️ Common Problems & Solutions — Plant Care Comparison
Larkspur Delphinium
Night Blooming Jasmine
❓ Frequently Asked Questions — Comparing These Plants
Larkspur Delphinium
What are the light requirements for Larkspur Delphinium?
Larkspur Delphiniums thrive in full sun, needing a minimum of six hours of direct sunlight each day to produce abundant blooms. Insufficient light can lead to leggy growth, weak stems, and reduced flowering. When planting, choose a location that receives morning sun, which helps to dry the foliage and prevent fungal diseases.
How do I care for Larkspur Delphinium?
Larkspur Delphiniums need well-draining soil enriched with organic matter. Plant in a location with full sun, providing at least six hours of direct sunlight daily. Water deeply when the top inch of soil feels dry, but avoid overwatering. Fertilize regularly during the growing season with a balanced fertilizer, switching to a fertilizer higher in phosphorus to promote blooming.
How do I propagate Larkspur Delphinium?
Larkspur Delphiniums can be propagated by division, stem cuttings, or seed. Division is best done in spring or fall by carefully separating the root ball and replanting the divisions. For stem cuttings, take 4-6 inch cuttings from new growth in spring, remove the lower leaves, and plant in a well-draining rooting medium. Keep the cuttings moist and in a humid environment until rooted.
Night Blooming Jasmine
What are the light requirements for Night Blooming Jasmine?
Night Blooming Jasmine thrives in bright, indirect sunlight. Direct sunlight can scorch its leaves, so avoid placing it in areas with intense midday sun. An east-facing window is ideal, providing gentle morning sun. South- or west-facing windows can also work, but filter the light with sheer curtains. Insufficient light can result in leggy growth and reduced blooming.
How do I care for Night Blooming Jasmine?
Night Blooming Jasmine requires bright, indirect sunlight, ideally 6-8 hours a day. Water thoroughly when the top inch of soil is dry, ensuring good drainage to prevent root rot. Maintain a humidity level of 50-60%, especially indoors, using a humidifier or pebble tray if necessary. Fertilize regularly during the growing season (spring and summer) with a balanced fertilizer, switching to a high-phosphorus formula to encourage blooming.
How do I propagate Night Blooming Jasmine?
Night Blooming Jasmine can be propagated by stem cuttings, layering, or seeds. Stem cuttings are the most common method. Take 4-6 inch cuttings 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.
Last updated: April 17, 2026 — Plant care data reviewed and verified by our editorial team.