False Dragonhead vs Paw Paw Plant Comparison
Compare these two plants side by side — care needs, key differences, and which is right for your home.
False Dragonhead
Physostegia virginiana
Physostegia virginiana, commonly known as False Dragonhead or Obedience Plant, is a rhizomatous perennial herb typically found in moist meadows and along stream banks. It features upright, square stems and lance-shaped, toothed leaves. The plant produces dense spikes of tubular, two-lipped flowers in shades of pink, purple, or white during late summer and early fall. While admired for its late-season blooms and ease of cultivation, its aggressive spreading habit via rhizomes can make it challenging to manage in smaller gardens. It is primarily grown outdoors in gardens and naturalized areas.
Paw Paw
Asimina triloba
Asimina triloba, the Pawpaw, is a deciduous tree or large shrub native to eastern North America. It typically grows 10-25 feet tall. It features large, oblong leaves that give it a tropical appearance. The tree produces edible fruit, the pawpaw, which is greenish-yellow to brown when ripe and has a creamy texture and flavor reminiscent of banana, mango, and vanilla. Pawpaws are primarily grown for their fruit, which can be eaten fresh or used in desserts and beverages. It is not naturally an indoor plant and requires specific conditions to thrive indoors.
Quick Plant Comparison
| Feature | False Dragonhead | Paw Paw |
|---|---|---|
| Light | Full sun to partial shade. Requires at least 6 hours of direct sunlight for optimal flowering. | Full sun to partial shade outdoors. Requires at least 6 hours of direct sunlight for optimal fruit production. |
| Watering | Every 7-10 days, depending on weather and soil drainage. | Weekly during the first year, then as needed during dry periods (outdoors). |
| Humidity | 30-50% | 40-60% |
| Temperature | 15-27°C | 10-30°C |
| Care Level | Expert | Expert |
| Growth Rate | Fast | Moderate |
| Max Height | Grown indoors, rarely flowers and reaches 30-60 cm. Outdoors, 60-120 cm. | Difficult to predict indoors, typically 1-3 meters in a very large container. Outdoors: 3-8 meters. |
| Pet Safety | ❌ Toxic To Pets | ❌ Toxic To Pets |
| Soil | Well-drained soil, loamy or sandy soil is best. Tolerates a range of soil types. | Well-drained, fertile soil with a slightly acidic to neutral pH (5.5-7.0). |
| Beginner Friendly | ❌ No | ❌ No |
| Weekly Maintenance | 30 minutes weekly during growing season (including watering, weeding, and pruning). | 1-2 hours weekly (outdoors, during growing season) |
🔬 Botanical Information — Comparing These Plants
False Dragonhead
| Scientific Name | Physostegia virginiana |
|---|---|
| Family | Lamiaceae |
| Native To | Eastern and Central North America |
| Also Known As | False Dragonhead, Obedience Plant |
| Leaves | Lance-shaped, toothed leaves that are arranged oppositely along the square stems. The leaves are typically green and can be up to 15 cm long. |
| Flowers | Rarely flowers indoors. Outdoors, it produces dense spikes of tubular, two-lipped flowers in shades of pink, purple, or white during late summer and early fall. |
Paw Paw
| Scientific Name | Asimina triloba |
|---|---|
| Family | Annonaceae |
| Native To | Eastern United States and Canada |
| Also Known As | Pawpaw, Paw Paw, Common Pawpaw, American Custard Apple |
| Leaves | The leaves of the pawpaw tree are large, oblong, and deciduous, typically measuring 15-30 cm long and 8-13 cm wide. They are a vibrant green color in the spring and summer, turning yellow in the fall before dropping. The texture is smooth and slightly leathery. |
| Flowers | Pawpaw trees produce maroon to purplish-brown flowers in the spring before the leaves emerge. The flowers are about 2-5 cm in diameter and have a slightly unpleasant odor that attracts pollinators like flies and beetles. Fruiting indoors is extremely rare. |
📏 Size & Growth — Plant Comparison
False Dragonhead
Paw Paw
🌱 Propagation — Comparing Plant Growth
False Dragonhead
Methods: Division, Seed, Stem cuttings
Difficulty: Easy
Tips: Divide rhizomes in spring or fall. Stem cuttings can be taken in late spring or early summer. Seeds can be sown in spring or fall.
Paw Paw
Methods: Seed, Root Suckers, Grafting
Difficulty: Moderate
Tips: Seeds require cold stratification for 90-120 days before planting. Grafting is often used to propagate desirable cultivars.
✨ Benefits & Features — Comparing Plant Value
False Dragonhead
The 'obedient' flowers can be positioned and will often stay in place. It is a late-season bloomer, providing color when many other plants are finished flowering. Its aggressive spreading habit can be both a benefit (for ground cover) and a challenge.
- ✓ Attracts pollinators to the garden.
- ✓ Provides late-season color.
- ✓ Relatively easy to grow in the right conditions.
- ✓ Can be used in cut flower arrangements.
- ✓ Adds a naturalistic touch to the landscape.
- ⚠️ Toxic to pets
Paw Paw
The pawpaw is the largest edible fruit native to North America and has a unique tropical flavor. It requires cross-pollination from different genetic sources to produce fruit, making it necessary to plant multiple trees.
- ✓ Provides edible fruit.
- ✓ Offers shade and visual interest in the landscape.
- ✓ Supports native wildlife.
- ✓ Unique and conversation-starting plant.
- ✓ Can be used in various culinary applications.
- ⚠️ Toxic to pets
📅 Maintenance Schedule — Plant Care Comparison
False Dragonhead
Paw Paw
🌞 Light Requirements
False Dragonhead
Full sun to partial shade. Requires at least 6 hours of direct sunlight for optimal flowering.
Low light tolerant: ❌ No
Paw Paw
Full sun to partial shade outdoors. Requires at least 6 hours of direct sunlight for optimal fruit production.
Low light tolerant: ❌ No
💧 Watering Needs
False Dragonhead
Water deeply when the top inch of soil feels dry. Avoid overwatering, which can lead to root rot. Signs of underwatering include wilting leaves, while overwatering can cause yellowing leaves and a soggy soil.
Paw Paw
Water deeply when planting and during dry periods, especially when young. Established trees are relatively drought-tolerant. Avoid overwatering, which can lead to root rot. Check soil moisture before watering.
🌡️ Temperature & Humidity
False Dragonhead
Temperature: 15-27°C
Humidity: 30-50%
Paw Paw
Temperature: 10-30°C
Humidity: 40-60%
🤔 Which Plant Is Right For You?
False Dragonhead
Physostegia virginianaGardeners looking for a late-season blooming perennial to attract pollinators in a sunny location.
✅ Choose This Plant If...
- You want a late-season bloomer for your garden.
- You want to attract butterflies and hummingbirds.
- You have a sunny location with well-drained soil.
- You are prepared to manage its aggressive spreading habit.
- You enjoy the unique 'obedient' characteristic of the flowers.
❌ Skip This Plant If...
- You have limited space in your garden due to its aggressive spreading.
- You are looking for a low-maintenance plant.
- You have pets that might ingest it.
- You want a plant suitable for indoor growing.
Paw Paw
Asimina trilobaExperienced gardeners in temperate climates who want to grow a unique fruit tree outdoors.
✅ Choose This Plant If...
- You live in a temperate climate with suitable outdoor growing conditions.
- You are an experienced gardener looking for a unique fruit tree to grow.
- You are interested in native North American plants.
- You have the space and resources to provide the necessary care and attention.
- You enjoy the taste of pawpaw fruit and want to grow your own.
❌ Skip This Plant If...
- You live in an apartment or have limited outdoor space.
- You are a beginner gardener.
- You have pets that may ingest the toxic seeds or bark.
- You do not have the time or resources to provide the specific care required.
- You are looking for an easy-to-grow indoor plant.
🎯 Quick Verdict
⚡ Key Differences Between These Plants
False Dragonhead has fast growth, while Paw Paw grows moderate.
💡 Pro Tips For Comparing These Plants
False Dragonhead Care Tips
False Dragonhead is primarily an outdoor plant and is challenging to grow indoors due to its high light requirements and aggressive spreading habit. It needs full sun and well-drained soil. Indoor cultivation is not recommended.
- Plant in full sun for best flowering.
- Divide plants every 2-3 years to control spread and rejuvenate growth.
- Water deeply but infrequently, allowing the soil to dry slightly between waterings.
- Monitor for powdery mildew and rust, and treat promptly.
- Use barriers or containers to restrict its aggressive spreading.
Paw Paw Care Tips
Pawpaws are challenging to grow indoors due to their need for full sun, specific chilling requirements for fruit production, and large size. They require a very large container, careful watering, and protection from extreme temperatures. Indoor fruiting is unlikely.
- Provide adequate sunlight for optimal fruit production.
- Ensure well-draining soil to prevent root rot.
- Protect young trees from strong winds.
- Water deeply during dry periods.
- Consider hand-pollinating the flowers to improve fruit set.
⚠️ Common Problems & Solutions — Plant Care Comparison
False Dragonhead
Paw Paw
❓ Frequently Asked Questions — Comparing These Plants
False Dragonhead
What are the light requirements for False Dragonhead?
False Dragonhead requires a minimum of six hours of direct sunlight daily for optimal growth and abundant flowering. A location with full sun is ideal, but it can tolerate partial shade, especially in hotter climates. In areas with intense afternoon sun, providing some afternoon shade can prevent leaf scorch. Insufficient light can lead to leggy growth, reduced flowering, and weaker stems. When planting, consider the amount of sunlight the area receives throughout the day. If growing indoors, place the plant near a sunny window, preferably south-facing. Rotate the plant regularly to ensure even light exposure on all sides. Supplemental lighting may be necessary during winter months or in areas with limited sunlight.
How do I care for False Dragonhead?
False Dragonhead thrives in full sun to partial shade, requiring at least 6 hours of sunlight daily for optimal blooming. Plant in well-draining soil that is consistently moist, but not waterlogged. Water deeply when the top inch of soil feels dry. Fertilize in spring with a balanced fertilizer to encourage healthy growth and abundant blooms. Deadhead spent flowers regularly to promote continuous blooming and prevent self-seeding, which can be aggressive in some cultivars. Divide clumps every 2-3 years in spring or fall to maintain vigor and prevent overcrowding. Provide support for taller varieties to prevent them from flopping over. Monitor for pests such as aphids and spider mites, and treat as needed. Prune back stems in late fall or early spring to prepare for the next growing season. Provide adequate air circulation to prevent fungal diseases. Amend heavy clay soils with organic matter to improve drainage.
How do I propagate False Dragonhead?
False Dragonhead can be easily propagated by division, stem cuttings, or seeds.
Paw Paw
What are the light requirements for Paw Paw?
Paw Paw trees require bright, indirect light to thrive indoors. Insufficient light can lead to leggy growth and reduced fruit production (if fruiting). A location near an east- or west-facing window is ideal. Avoid direct sunlight, especially during the hottest part of the day, as it can scorch the leaves. If natural light is limited, supplement with a grow light. Rotate the plant regularly to ensure even light exposure on all sides. Observe the plant’s growth habit to determine if it’s receiving adequate light. If the stems are stretching towards the light source, it indicates that more light is needed.
How do I care for Paw Paw?
To successfully grow Paw Paw indoors, provide bright, indirect light, ideally near an east- or west-facing window. Use a well-draining potting mix rich in organic matter. Water thoroughly when the top inch of soil feels dry, allowing excess water to drain away. Maintain moderate humidity levels, especially during winter months when indoor air tends to be drier. Fertilize sparingly during the growing season (spring and summer) with a balanced liquid fertilizer diluted to half strength. Repot young plants annually in spring, increasing the pot size gradually. Prune to maintain shape and remove any dead or damaged branches. Protect from drafts and sudden temperature changes. Monitor regularly for pests and diseases. Provide stable growing conditions, avoiding overwatering or underwatering.
How do I propagate Paw Paw?
Paw Paw can be propagated by stem cuttings or air layering. For stem cuttings, take a 4-6 inch cutting from new growth in spring or early summer. Remove the lower leaves and dip the cut end in rooting hormone. Plant the cutting in a well-draining potting mix and keep it moist. Cover with a plastic bag to maintain humidity. For air layering, make a small incision on a stem and wrap it with moist sphagnum moss. Cover the moss with plastic wrap and secure it with tape. Once roots develop, cut the stem below the roots and plant it in a pot. Both methods require patience and consistent moisture.
Last updated: May 12, 2026 — Plant care data reviewed and verified by our editorial team.