Hemp vs Johnny Jump Up Plant Comparison
Compare these two plants side by side — care needs, key differences, and which is right for your home.
Hemp
Cannabis sativa
Hemp (Cannabis sativa) is an annual herbaceous plant characterized by its tall, slender stalks and palmate leaves. It's primarily cultivated for its fiber, seeds, and oil. Unlike its close relative, marijuana, hemp contains very low levels of THC (tetrahydrocannabinol), the psychoactive compound. It's a fast-growing plant, typically grown outdoors in agricultural settings. While technically possible to grow indoors, it requires significant space and specialized equipment to mimic its natural outdoor environment. People grow it for industrial purposes, not typically as an ornamental houseplant.
Johnny Jump Up
Viola tricolor
Viola tricolor, commonly known as Johnny Jump Up, is a small, herbaceous annual or short-lived perennial plant. It typically grows to a height of 15-30 cm. The plant features heart-shaped leaves and charming, tri-colored flowers, usually in shades of purple, yellow, and white. It is primarily an outdoor plant, often grown in gardens, borders, and containers for its cheerful blooms and ability to self-seed readily. People grow it for its ornamental value and ease of cultivation in outdoor settings.
Quick Plant Comparison
| Feature | Hemp | Johnny Jump Up |
|---|---|---|
| Light | Full sun (at least 6-8 hours of direct sunlight daily) | Full sun to partial shade. Requires at least 6 hours of direct sunlight for optimal flowering. |
| Watering | Every 2-3 days outdoors, less frequently if attempted indoors | Every 2-3 days in warm weather, less frequently in cooler weather. Check soil moisture before watering. |
| Humidity | 40-60% | 30-50% |
| Temperature | 15-27°C | 10-24°C |
| Care Level | Expert | Expert |
| Growth Rate | Fast | Moderate |
| Max Height | Up to 4 meters outdoors; significantly smaller if grown indoors (1-2 meters) | 15-30 cm |
| Pet Safety | ❌ Toxic To Pets | ❌ Toxic To Pets |
| Soil | Well-draining, loamy soil with a pH between 6.0 and 7.5 | Well-draining, fertile soil rich in organic matter. A slightly acidic to neutral pH (6.0-7.0) is ideal. |
| Beginner Friendly | ❌ No | With Caution |
| Weekly Maintenance | 1-2 hours weekly (primarily for watering, fertilizing, and pest control) | 10 minutes weekly |
🔬 Botanical Information — Comparing These Plants
Hemp
| Scientific Name | Cannabis sativa |
|---|---|
| Family | Cannabaceae |
| Native To | Central Asia |
| Also Known As | Hemp, Industrial Hemp |
| Leaves | The leaves are palmate, meaning they have multiple leaflets radiating from a central point, similar to a hand. The leaflets are serrated and typically green in color. |
| Flowers | Hemp plants are dioecious, meaning they have separate male and female plants. The flowers are small and inconspicuous, typically green or yellowish-green. Flowering occurs in late summer or early fall. |
Johnny Jump Up
| Scientific Name | Viola tricolor |
|---|---|
| Family | Violaceae |
| Native To | Europe and temperate Asia |
| Also Known As | Johnny Jump Up, Heartsease, Wild Pansy, Love-in-idleness |
| Leaves | The leaves are heart-shaped to ovate, with scalloped edges. They are typically green, but can sometimes have a purplish tinge. The leaves are usually 2-5 cm long and have a slightly rough texture. |
| Flowers | It flowers profusely outdoors in spring and early summer. The flowers are typically 2-4 cm in diameter and have five petals. The petals are usually a combination of purple, yellow, and white, creating a tri-colored effect. Flowering is rare indoors. |
📏 Size & Growth — Plant Comparison
Hemp
Johnny Jump Up
🌱 Propagation — Comparing Plant Growth
Hemp
Methods: Seed
Difficulty: Easy
Tips: Soak seeds in water for 24 hours before planting. Sow seeds directly into the soil in a sunny location.
Johnny Jump Up
Methods: Seed, stem cuttings, division
Difficulty: Easy
Tips: Sow seeds directly into the garden in early spring or late summer. For cuttings, take stem cuttings in spring and root them in moist soil. Division can be done in spring or fall.
✨ Benefits & Features — Comparing Plant Value
Hemp
Hemp's rapid growth and versatile applications make it a unique and valuable crop. Its low THC content distinguishes it from marijuana, making it suitable for industrial uses without psychoactive effects.
- ✓ Sustainable fiber production.
- ✓ Potential for biofuel production.
- ✓ Soil remediation.
- ✓ Carbon sequestration.
- ✓ Versatile raw material for various industries.
- ⚠️ Toxic to pets
Johnny Jump Up
The tri-colored flowers are a distinctive feature, making it easily recognizable. It readily self-seeds, creating a naturalized look in gardens. The flowers are also edible, adding a unique touch to culinary creations.
- ✓ Adds vibrant color to gardens and containers.
- ✓ Attracts pollinators like bees and butterflies.
- ✓ Provides edible flowers for culinary use.
- ✓ Self-seeds readily, creating a naturalized look.
- ✓ Relatively low-maintenance once established.
- ⚠️ Toxic to pets
📅 Maintenance Schedule — Plant Care Comparison
Hemp
Johnny Jump Up
🌞 Light Requirements
Hemp
Full sun (at least 6-8 hours of direct sunlight daily)
Low light tolerant: ❌ No
Johnny Jump Up
Full sun to partial shade. Requires at least 6 hours of direct sunlight for optimal flowering.
Low light tolerant: ❌ No
💧 Watering Needs
Hemp
Water deeply when the top inch of soil is dry. Avoid overwatering, which can lead to root rot. Signs of underwatering include wilting leaves. Signs of overwatering include yellowing leaves and a soggy soil.
Johnny Jump Up
Water regularly, especially during dry periods. Keep the soil consistently moist but not waterlogged. Overwatering can lead to root rot, indicated by yellowing leaves and a musty smell. Underwatering results in wilting and dry, crispy leaves.
🌡️ Temperature & Humidity
Hemp
Temperature: 15-27°C
Humidity: 40-60%
Johnny Jump Up
Temperature: 10-24°C
Humidity: 30-50%
🤔 Which Plant Is Right For You?
Hemp
Cannabis sativaFarmers or researchers interested in cultivating hemp for industrial purposes.
✅ Choose This Plant If...
- You are interested in cultivating hemp for industrial purposes.
- You have ample outdoor space and full sun.
- You are experienced with managing large, fast-growing plants.
- You understand the specific legal regulations regarding hemp cultivation in your area.
- You need a plant for fiber production.
❌ Skip This Plant If...
- You are looking for a low-maintenance houseplant.
- You have limited indoor space.
- You have pets that might ingest the plant.
- You are not familiar with agricultural practices.
- You are concerned about the legal restrictions surrounding Cannabis cultivation.
Johnny Jump Up
Viola tricolorGardeners looking for a cheerful, low-maintenance flowering plant for borders, containers, or naturalized areas.
✅ Choose This Plant If...
- You want a plant that self-seeds easily.
- You want edible flowers for culinary use.
- You want to attract pollinators to your garden.
- You want a low-maintenance plant for borders or containers.
- You want a plant that adds a splash of color to your garden in early spring.
❌ Skip This Plant If...
- You are looking for a low-light indoor plant.
- You have pets that might ingest the plant.
- You live in a very hot climate where it may struggle.
🎯 Quick Verdict
⚡ Key Differences Between These Plants
Hemp has fast growth, while Johnny Jump Up grows moderate.
💡 Pro Tips For Comparing These Plants
Hemp Care Tips
Hemp is primarily an outdoor agricultural crop. Growing it indoors is challenging due to its high light requirements and potential size. It requires precise environmental control and is not a typical houseplant. Toxicity to pets is a significant concern.
- Ensure proper soil drainage to prevent root rot.
- Provide adequate sunlight for optimal growth.
- Monitor for pests and diseases regularly.
- Fertilize during the growing season to support rapid development.
- Research and comply with all local regulations regarding hemp cultivation.
Johnny Jump Up Care Tips
Johnny Jump Ups are primarily outdoor plants and struggle indoors due to high light requirements and the need for cooler temperatures. They require consistent moisture, well-draining soil, and regular fertilization. Indoor cultivation is challenging and often results in leggy growth and reduced flowering.
- Deadhead spent flowers regularly to encourage more blooms.
- Provide well-draining soil to prevent root rot.
- Fertilize every 4-6 weeks during the growing season with a balanced liquid fertilizer.
- Protect from extreme heat by providing afternoon shade.
- Monitor for pests like aphids and slugs, and treat promptly.
⚠️ Common Problems & Solutions — Plant Care Comparison
Hemp
Johnny Jump Up
❓ Frequently Asked Questions — Comparing These Plants
Hemp
What are the light requirements for Hemp?
Hemp thrives in bright, direct sunlight, requiring at least 6-8 hours per day for optimal growth and flowering. A south-facing window is ideal for indoor cultivation. Insufficient light can lead to leggy growth, reduced flowering, and pale foliage. If natural sunlight is limited, supplement with artificial grow lights, such as LED or high-pressure sodium (HPS) lights. Maintain a distance of 12-18 inches between the lights and the plant canopy. During the vegetative stage, provide 18 hours of light and 6 hours of darkness. Switch to a 12/12 light cycle (12 hours of light and 12 hours of darkness) to induce flowering. Consistent light cycles are crucial for successful blooming.
How do I care for Hemp?
Caring for Hemp involves providing the right balance of light, water, nutrients, and environmental conditions. Provide at least 6-8 hours of direct sunlight daily, especially during the flowering stage. Water thoroughly when the top inch of soil feels dry, ensuring good drainage to prevent root rot. Use a well-draining potting mix rich in organic matter. Fertilize regularly with a balanced fertilizer during vegetative growth, then switch to a bloom-boosting fertilizer during flowering. Maintain a humidity level between 40-60%. Prune regularly to encourage bushier growth and remove any dead or yellowing leaves. Monitor for pests and diseases, and treat promptly if necessary. Provide adequate ventilation to prevent mold and mildew. Temperature should be between 65-80°F (18-27°C). Regularly check for nutrient deficiencies.
How do I propagate Hemp?
Hemp can be propagated through stem cuttings, division (for some varieties), and, less commonly, seeds. For stem cuttings, take a 4-6 inch cutting from a healthy plant, removing the lower leaves. Dip the cut end in rooting hormone and plant in a well-draining rooting medium, such as perlite or vermiculite. Keep the medium moist and provide high humidity by covering the cutting with a plastic dome or bag. Place in indirect light. Roots should develop within 2-4 weeks. For division, carefully separate the root ball of a mature plant into smaller sections, ensuring each section has healthy roots and foliage. Replant each section in its own pot. Seed propagation involves germinating seeds in a moist paper towel or directly in the soil. Keep the soil warm and moist until germination occurs.
Johnny Jump Up
What are the light requirements for Johnny Jump Up?
Johnny Jump Ups thrive in partial to full sun, requiring at least six hours of sunlight per day for optimal blooming. In hotter climates, providing some afternoon shade is beneficial to prevent scorching of the leaves and flowers. Insufficient sunlight can lead to leggy growth and reduced flowering.
How do I care for Johnny Jump Up?
Johnny Jump Ups are relatively easy to care for, making them a great choice for beginner gardeners. Plant them in well-draining soil that is rich in organic matter. Choose a location that receives partial to full sun, especially in cooler climates. Water regularly, keeping the soil consistently moist but not soggy.
How do I propagate Johnny Jump Up?
Johnny Jump Ups can be propagated through seeds, division, or stem cuttings. For seed propagation, collect seeds from dried flower heads and sow them in well-draining soil. Keep the soil moist and provide indirect light. Germination usually occurs within 1-2 weeks. For division, gently separate the root ball of a mature plant into smaller sections and replant them.
Last updated: May 3, 2026 — Plant care data reviewed and verified by our editorial team.