Cup Flower vs Golden Dewdrop Plant Comparison
Compare these two plants side by side — care needs, key differences, and which is right for your home.
Cup Flower
Cobaea scandens
Cobaea scandens, commonly known as Cup Flower or Cup-and-Saucer Vine, is a vigorous, fast-growing perennial vine often grown as an annual in temperate climates. It is characterized by its climbing habit, using tendrils to attach to supports. The plant produces unique, bell-shaped flowers that start green and mature to a deep purple or white, resembling cups sitting on saucers. It is primarily an outdoor plant, valued for its rapid growth and ability to cover fences, trellises, and walls quickly. While occasionally grown indoors, it requires significant space and light to thrive.
Golden Dewdrop
Duranta erecta
Golden Dewdrop (Duranta erecta) is a fast-growing shrub or small tree, typically grown outdoors in warm climates. It features vibrant green foliage and produces clusters of small, tubular, lavender or blue flowers that are followed by showy golden-yellow berries, hence the name. While it can be grown in containers, it's primarily an outdoor plant and may struggle indoors due to its high light requirements and potential size. People grow it for its attractive flowers, berries, and ease of care in suitable climates. It is often used in hedges, borders, or as a specimen plant.
Quick Plant Comparison
| Feature | Cup Flower | Golden Dewdrop |
|---|---|---|
| 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 flowering and berry production. |
| Watering | Outdoors: Every 2-3 days in hot weather, less frequently in cooler weather. Indoors: Every 7-10 days, depending on light and humidity. | Every 3-7 days outdoors, depending on weather and soil drainage. Less frequently indoors if attempted. |
| Humidity | 40-60% | 40-60% |
| Temperature | 18-27°C | 18-27°C |
| Care Level | Expert | Expert |
| Growth Rate | Fast | Fast |
| Max Height | Outdoors: 6-12 meters. Indoors: 1-3 meters (highly dependent on support and pruning). | Up to 1-3 meters indoors (highly variable and difficult to achieve). Outdoors, can reach 5 meters or more. |
| Pet Safety | ✅ Safe | ❌ Toxic To Pets |
| Soil | Well-draining, fertile soil. A mix of potting soil, perlite, and compost is suitable. | Well-draining soil, such as a mix of potting soil, perlite, and sand. |
| Beginner Friendly | ❌ No | ❌ No |
| Weekly Maintenance | 30 minutes weekly (pruning, watering, fertilizing). | 30 minutes weekly (including watering, pruning, and pest control) |
🔬 Botanical Information — Comparing These Plants
Cup Flower
| Scientific Name | Cobaea scandens |
|---|---|
| Family | Polemoniaceae |
| Native To | Mexico, Central America |
| Also Known As | Cup-and-Saucer Vine, Cathedral Bells, Mexican Ivy, Monastery Bells |
| Leaves | The leaves are pinnately compound, with 4-6 leaflets and a terminal tendril. The leaflets are ovate to elliptic, with a smooth margin and a dark green color. They are typically 5-10 cm long. |
| Flowers | It can flower indoors with sufficient light, but flowering is more prolific outdoors. The flowers are bell-shaped, about 5-7 cm in diameter, and start green before turning purple or white. They have a distinctive cup-and-saucer shape. |
Golden Dewdrop
| Scientific Name | Duranta erecta |
|---|---|
| Family | Verbenaceae |
| Native To | Native to the Americas, from Florida to Brazil and Argentina |
| Also Known As | Golden Dewdrop, Skyflower, Pigeon Berry |
| Leaves | The leaves are ovate to elliptic, about 2-8 cm long, with a glossy green color. They are oppositely arranged on the stems and have a slightly serrated margin. The texture is smooth and slightly leathery. |
| Flowers | It produces clusters of small, tubular flowers in shades of lavender, blue, or white. The flowers are fragrant and attract butterflies and bees. Flowering occurs primarily in spring and summer. It is unlikely to flower indoors. |
📏 Size & Growth — Plant Comparison
Cup Flower
Golden Dewdrop
🌱 Propagation — Comparing Plant Growth
Cup Flower
Methods: Seed, Stem cuttings
Difficulty: Moderate
Tips: For seeds, scarify the seed coat before sowing to improve germination. For stem cuttings, take semi-hardwood cuttings in late summer and root them in a well-draining medium.
Golden Dewdrop
Methods: Stem cuttings, Seed
Difficulty: Easy
Tips: Take stem cuttings in spring or summer. Dip the cut end in rooting hormone and plant in well-draining soil. Keep the soil moist and provide warmth and humidity. Seeds can be sown in spring after soaking them in water for 24 hours.
✨ Benefits & Features — Comparing Plant Value
Cup Flower
The cup-shaped flowers are its most distinctive feature, with their unique shape and color-changing properties. Its rapid growth rate allows it to quickly cover large areas, making it a popular choice for creating privacy screens or adding vertical interest to gardens.
- ✓ Provides quick coverage for fences and walls
- ✓ Attracts pollinators like bees and hummingbirds
- ✓ Adds a unique and exotic touch to the garden
- ✓ Offers a visually appealing display with its cup-shaped flowers
- ✓ Can be grown in containers, allowing for flexibility in placement
- 🐾 Pet Safe
Golden Dewdrop
The combination of lavender/blue flowers and golden-yellow berries is unique. It's a fast-growing shrub that can quickly fill in spaces in the garden. The berries are attractive to birds, adding to its ecological value.
- ✓ Attracts pollinators to the garden.
- ✓ Provides visual interest with flowers and berries.
- ✓ Can be used for hedging and screening.
- ✓ Provides a habitat for birds.
- ✓ Adds a tropical feel to the landscape.
- ⚠️ Toxic to pets
📅 Maintenance Schedule — Plant Care Comparison
Cup Flower
Golden Dewdrop
🌞 Light Requirements
Cup Flower
Full sun to partial shade outdoors. Indoors, requires very bright, direct light for several hours daily.
Low light tolerant: ❌ No
Golden Dewdrop
Full sun to partial shade. Requires at least 6 hours of direct sunlight daily for optimal flowering and berry production.
Low light tolerant: ❌ No
💧 Watering Needs
Cup Flower
Water deeply when the top inch of soil feels dry. Avoid overwatering, which can lead to root rot. Ensure good drainage. Indoors, allow the soil to dry out slightly between waterings. Signs of underwatering include wilting leaves; overwatering includes yellowing leaves and soggy soil.
Golden Dewdrop
Water thoroughly when the top inch of soil feels dry. Avoid overwatering, which can lead to root rot. In containers, ensure good drainage. During the growing season, water more frequently. Reduce watering in winter.
🌡️ Temperature & Humidity
Cup Flower
Temperature: 18-27°C
Humidity: 40-60%
Golden Dewdrop
Temperature: 18-27°C
Humidity: 40-60%
🤔 Which Plant Is Right For You?
Cup Flower
Cobaea scandensGardeners with ample outdoor space looking for a fast-growing vine to cover structures.
✅ Choose This Plant If...
- You want a fast-growing vine to quickly cover a fence or trellis.
- You are looking for a plant with unique and interesting flowers.
- You want to attract pollinators to your garden.
- You have a sunny outdoor space where the vine can thrive.
- You enjoy a challenge and are willing to provide the specific care needed for indoor growth.
❌ Skip This Plant If...
- You have limited indoor space and cannot provide ample light.
- You are looking for a low-maintenance indoor plant.
- You live in a climate with harsh winters and don't want to overwinter the plant indoors.
Golden Dewdrop
Duranta erectaGardeners in warm climates looking for a flowering shrub to attract pollinators.
✅ Choose This Plant If...
- You live in a warm climate with plenty of sunshine.
- You want to attract butterflies and birds to your garden.
- You are looking for a fast-growing shrub for hedging or borders.
- You enjoy showy flowers and golden berries.
- You are experienced with pruning and shaping shrubs.
❌ Skip This Plant If...
- You have pets that might ingest the plant.
- You live in a cold climate with limited sunlight.
- You are looking for a low-maintenance indoor 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
Cup Flower Care Tips
Cobaea scandens is primarily an outdoor plant. Growing it indoors is challenging due to its high light requirements and vigorous growth. It needs ample space, strong support, and regular pruning to manage its size. Providing adequate light is crucial for flowering indoors.
- Provide a strong support structure for the vine to climb.
- Water deeply but infrequently, allowing the soil to dry slightly between waterings.
- Fertilize regularly during the growing season to promote vigorous growth and flowering.
- Prune regularly to control size and shape, especially indoors.
- Monitor for pests and diseases and treat promptly.
Golden Dewdrop Care Tips
Golden Dewdrop is primarily an outdoor plant and requires full sun to thrive. Growing it indoors is challenging due to its high light needs and potential size. It is toxic to pets, so caution is needed. Requires regular pruning to maintain shape. Best suited for outdoor gardens in warm climates.
- Provide full sun for optimal flowering and berry production.
- Water deeply but infrequently, allowing the soil to dry slightly between waterings.
- Prune regularly to maintain shape and size.
- Fertilize during the growing season to promote healthy growth.
- Protect from frost in colder climates.
⚠️ Common Problems & Solutions — Plant Care Comparison
Cup Flower
Golden Dewdrop
❓ Frequently Asked Questions — Comparing These Plants
Cup Flower
What are the light requirements for Cup Flower?
Cup Flower requires bright, indirect light to thrive and produce abundant blooms. A location near an east- or west-facing window is ideal, providing several hours of gentle morning or afternoon sun. Avoid placing the plant in direct, intense sunlight, which can scorch the leaves. If growing indoors, supplement natural light with a grow light if necessary, especially during the winter months. Insufficient light can result in leggy growth, fewer blooms, and pale foliage. Rotate the plant regularly to ensure even light exposure on all sides. When growing outdoors, choose a spot that receives full sun for at least 6 hours a day, but with some protection from the harshest midday rays, especially in hotter climates.
How do I care for Cup Flower?
Cup Flower thrives with consistent care. Provide bright, indirect light, avoiding harsh direct sunlight. Water thoroughly when the top inch of soil feels dry, ensuring good drainage to prevent root rot. Fertilize regularly during the growing season (spring and summer) with a balanced liquid fertilizer diluted to half strength, focusing on formulas higher in phosphorus to promote blooming. Maintain moderate humidity levels, especially indoors, by misting or using a humidifier. Prune spent flowers to encourage continuous blooming. Repot in spring every 1-2 years into a slightly larger pot with well-draining potting mix. Monitor for pests like aphids and spider mites, treating promptly with insecticidal soap or neem oil. Provide temperatures between 60-75°F (15-24°C) for optimal growth. Reduce watering and fertilization in the fall and winter as growth slows. Ensure good air circulation to prevent fungal diseases.
How do I propagate Cup Flower?
Cup Flower can be propagated through stem cuttings, division, and, less commonly, from keiki (small plantlets that grow on the parent plant). For stem cuttings, take 4-6 inch cuttings from healthy stems, remove the lower leaves, and dip the cut end in rooting hormone. Plant the cuttings in moist potting mix and cover with a plastic bag to maintain humidity. Keep in a warm, bright location until roots develop (usually 4-6 weeks). For division, carefully separate the root ball of a mature plant into smaller sections, ensuring each section has healthy roots and stems. Replant the divisions in separate pots. Keiki propagation is rare, but if keiki develop, allow them to grow until they have roots, then carefully remove them and plant in their own pots.
Golden Dewdrop
What are the light requirements for Golden Dewdrop?
Golden Dewdrop thrives in bright, indirect sunlight. It needs at least 6 hours of sunlight daily to produce abundant flowers and berries. An east-facing or west-facing window is ideal, providing ample morning or afternoon sun without the harsh intensity of midday sun. If grown indoors, rotate the plant regularly to ensure even light exposure on all sides. Insufficient light can lead to leggy growth, reduced flowering, and pale leaves. During winter months, when sunlight is limited, consider supplementing with a grow light to maintain healthy growth and encourage blooming.
How do I care for Golden Dewdrop?
Golden Dewdrop requires bright, indirect sunlight for at least 6 hours a day. Water thoroughly when the top inch of soil feels dry, ensuring good drainage to prevent root rot. Fertilize monthly during the growing season (spring and summer) with a balanced, water-soluble fertilizer to encourage blooming and berry production. Prune regularly to maintain shape and promote bushier growth, ideally after flowering. Maintain a moderate humidity level, especially indoors, by misting or using a humidifier. Repot every 1-2 years as needed, using a well-draining potting mix. Protect from frost as it is not cold-hardy. Monitor for pests like aphids and spider mites, and treat promptly with insecticidal soap.
How do I propagate Golden Dewdrop?
Golden Dewdrop can be propagated through stem cuttings. Take 4-6 inch stem 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 bright, indirect light. Rooting typically occurs in 4-6 weeks. Division is possible for established plants. Carefully separate the root ball into smaller sections, ensuring each section has healthy roots and foliage. Replant each section in its own pot. Keiki propagation is not applicable to Golden Dewdrop.
Last updated: May 1, 2026 — Plant care data reviewed and verified by our editorial team.