Kohlrabi vs Lamb's Ear Plant Comparison
Compare these two plants side by side — care needs, key differences, and which is right for your home.
Kohlrabi
Brassica oleracea var. gongylodes
Kohlrabi is a biennial vegetable cultivated as an annual, known for its swollen, globular stem that grows above ground. It features a crisp, mild flavor similar to a turnip or cabbage. The plant has long-stalked leaves emerging from the bulbous stem. It is primarily grown outdoors in gardens and farms for its edible stem and leaves. While it can be started indoors, it requires full sun and ample space to thrive, making it challenging to grow to maturity indoors. People grow kohlrabi for its unique texture and flavor in salads, stir-fries, and other culinary applications.
Lamb's Ear
Stachys byzantina
Lamb's Ear is a herbaceous perennial known for its soft, velvety leaves that resemble a lamb's ear. It typically grows as a ground cover, forming a dense mat of foliage. The plant produces insignificant flower spikes in summer, but it's primarily grown for its unique foliage. It is primarily an outdoor plant, valued for its texture and drought tolerance in garden settings. While it can be attempted indoors, it often struggles to thrive due to insufficient light and humidity.
Quick Plant Comparison
| Feature | Kohlrabi | Lamb's Ear |
|---|---|---|
| Light | Full sun (at least 6 hours of direct sunlight daily) | Full sun to partial shade outdoors; requires very bright, direct light indoors (south-facing window). |
| Watering | Every 2-3 days outdoors, depending on weather conditions | Every 2-4 weeks indoors, depending on light and humidity. |
| Humidity | 40-60% | 30-50% |
| Temperature | 15-24°C | 15-27°C |
| Care Level | Expert | Expert |
| Growth Rate | Moderate | Moderate; Can Spread Aggressively Via Rhizomes Outdoors. |
| Max Height | 30-45 cm (outdoors) | 15-30 cm (indoors, often smaller) |
| Pet Safety | ✅ Safe | ✅ Safe |
| Soil | Well-draining, fertile soil rich in organic matter | Well-draining soil; sandy or loamy soil is ideal. Avoid heavy clay soils. |
| Beginner Friendly | ❌ No | With Caution |
| Weekly Maintenance | 15-30 minutes weekly | 5-10 minutes weekly (mostly removing spent flowers and dead leaves). |
🔬 Botanical Information — Comparing These Plants
Kohlrabi
| Scientific Name | Brassica oleracea var. gongylodes |
|---|---|
| Family | Brassicaceae |
| Native To | Northern Europe |
| Also Known As | German turnip, turnip cabbage |
| Leaves | The leaves of kohlrabi are typically bluish-green, broad, and have a slightly waxy texture. They are attached to the stem by long, slender stalks. The leaf shape can vary, but they are generally oval or rounded with slightly serrated edges. |
| Flowers | Kohlrabi will flower in its second year if allowed to overwinter. The flowers are typical of the Brassica family, with four petals arranged in a cross shape, usually yellow or white. Flowering is rare when grown as an annual for its bulb. |
Lamb's Ear
| Scientific Name | Stachys byzantina |
|---|---|
| Family | Lamiaceae |
| Native To | Turkey, Armenia, Iran |
| Also Known As | Lamb's Ear, Woolly Lamb's Ear, Lamb's Tongue |
| Leaves | The leaves are oblong to lance-shaped, 10-20 cm long, and covered in dense, silvery-white hairs, giving them a soft, velvety texture. The color is typically silvery-green to gray. |
| Flowers | Produces insignificant, small, purplish-pink flowers on tall spikes in summer. Flowering is less common indoors. |
📏 Size & Growth — Plant Comparison
Kohlrabi
Lamb's Ear
🌱 Propagation — Comparing Plant Growth
Kohlrabi
Methods: Seed
Difficulty: Easy
Tips: Start seeds indoors 4-6 weeks before the last frost or direct sow outdoors after the last frost. Keep soil consistently moist.
Lamb's Ear
Methods: Division, Seed, Stem cuttings
Difficulty: Easy
Tips: Divide clumps in spring or fall. Stem cuttings root easily in water or moist soil. Seeds can be sown directly in the garden in spring or fall.
✨ Benefits & Features — Comparing Plant Value
Kohlrabi
Kohlrabi is unique due to its edible, swollen stem that grows above ground, unlike root vegetables. Its mild flavor and crisp texture make it a versatile ingredient in various dishes. The plant also offers edible leaves, adding to its appeal.
- ✓ Provides fresh, nutritious vegetables
- ✓ Adds visual interest to the garden
- ✓ Encourages healthy eating habits
- ✓ Offers a unique culinary ingredient
- ✓ Supports sustainable living
- 🐾 Pet Safe
Lamb's Ear
Lamb's Ear is distinguished by its incredibly soft, woolly leaves, which give it a unique texture and appearance. Its drought tolerance and deer resistance make it a valuable addition to many gardens.
- ✓ Drought tolerance reduces water usage.
- ✓ Soft texture adds visual interest to gardens.
- ✓ Deer resistance minimizes garden damage.
- ✓ Low maintenance once established.
- ✓ Easy to propagate and share with friends.
- 🐾 Pet Safe
📅 Maintenance Schedule — Plant Care Comparison
Kohlrabi
Lamb's Ear
🌞 Light Requirements
Kohlrabi
Full sun (at least 6 hours of direct sunlight daily)
Low light tolerant: ❌ No
Lamb's Ear
Full sun to partial shade outdoors; requires very bright, direct light indoors (south-facing window).
Low light tolerant: ❌ No
💧 Watering Needs
Kohlrabi
Water deeply when the top inch of soil feels dry. Avoid overwatering, which can lead to rot. Consistent moisture is important for bulb development. Signs of underwatering include wilting leaves and stunted growth. Overwatering can cause yellowing leaves and a mushy stem.
Lamb's Ear
Allow the soil to dry out completely between waterings. Overwatering can lead to root rot. Outdoors, water deeply but infrequently, especially during dry spells. Indoors, water sparingly. Signs of overwatering include yellowing leaves and a mushy stem. Underwatering results in wilting and dry, crispy leaves.
🌡️ Temperature & Humidity
Kohlrabi
Temperature: 15-24°C
Humidity: 40-60%
Lamb's Ear
Temperature: 15-27°C
Humidity: 30-50%
🤔 Which Plant Is Right For You?
Kohlrabi
Brassica oleracea var. gongylodesGardeners looking for a unique and nutritious vegetable to grow outdoors.
✅ Choose This Plant If...
- You have a sunny garden space.
- You enjoy growing your own vegetables.
- You want a unique and nutritious addition to your diet.
- You are looking for a relatively fast-growing crop.
- You enjoy the taste of cabbage and turnips.
❌ Skip This Plant If...
- You lack sufficient outdoor space.
- You cannot provide at least 6 hours of direct sunlight daily.
- You are looking for a low-maintenance indoor plant.
Lamb's Ear
Stachys byzantinaGardeners seeking a drought-tolerant, textural ground cover for sunny locations.
✅ Choose This Plant If...
- You want a drought-tolerant ground cover for a sunny garden.
- You appreciate plants with unique textures.
- You want a deer-resistant plant.
- You live in a hot, dry climate.
- You enjoy propagating plants from cuttings or divisions.
❌ Skip This Plant If...
- You have limited sunlight indoors.
- You tend to overwater plants.
- You live in a very humid climate with poor air circulation.
🎯 Quick Verdict
⚡ Key Differences Between These Plants
Kohlrabi has moderate growth, while Lamb's Ear grows moderate; can spread aggressively via rhizomes outdoors..
💡 Pro Tips For Comparing These Plants
Kohlrabi Care Tips
Kohlrabi is primarily an outdoor plant that requires full sun and consistent moisture. Growing it indoors is challenging due to the high light requirements and space needed for bulb development. It's best suited for experienced gardeners with outdoor space.
- Start seeds indoors for an earlier harvest.
- Ensure well-draining soil to prevent rot.
- Provide consistent moisture for optimal bulb development.
- Fertilize regularly during the growing season.
- Protect from pests like aphids and cabbage worms.
Lamb's Ear Care Tips
Lamb's Ear is primarily an outdoor plant and requires full sun. It is difficult to maintain indoors due to high light requirements and susceptibility to fungal diseases in humid environments. Indoor cultivation requires very bright light and careful watering to prevent root rot. It can be an aggressive spreader outdoors.
- Ensure excellent drainage to prevent root rot.
- Provide ample sunlight for optimal growth and color.
- Avoid overhead watering to minimize fungal diseases.
- Divide clumps every few years to maintain vigor.
- Remove dead or damaged leaves promptly.
⚠️ Common Problems & Solutions — Plant Care Comparison
Kohlrabi
Lamb's Ear
❓ Frequently Asked Questions — Comparing These Plants
Kohlrabi
What are the light requirements for Kohlrabi?
Kohlrabi thrives in full sun, requiring at least 6 hours of direct sunlight per day to produce healthy bulbs. Insufficient light can lead to leggy growth and smaller, less flavorful bulbs. In hotter climates, providing some afternoon shade can prevent the plant from bolting (prematurely going to seed). When growing indoors, place Kohlrabi near a south-facing window or use grow lights to supplement natural light. Rotate the plants regularly to ensure even light exposure on all sides. Monitor the leaves for signs of insufficient light, such as pale color or elongated stems, and adjust the light accordingly.
How do I care for Kohlrabi?
Kohlrabi requires well-draining soil rich in organic matter. Plant seeds directly in the garden or start indoors 4-6 weeks before the last frost. Space plants 6-8 inches apart in rows 12-18 inches apart. Water regularly, keeping the soil consistently moist but not waterlogged. Fertilize every 2-3 weeks with a balanced fertilizer, paying attention to potassium levels to promote strong bulb development. Kohlrabi prefers full sun but can tolerate partial shade, especially in warmer climates. Harvest when the bulb reaches 2-3 inches in diameter for the best flavor and texture. Protect from pests like cabbage worms and aphids with appropriate organic pest control methods. Rotate crops annually to prevent soilborne diseases.
How do I propagate Kohlrabi?
Kohlrabi is typically propagated by seed, but it is possible to propagate it through vegetative methods, although less common.
Lamb's Ear
What are the light requirements for Lamb's Ear?
Lamb’s Ear thrives best in full sun, requiring at least 6 hours of direct sunlight per day. Ample sunlight promotes vigorous growth and enhances the silver coloration of the leaves. While it can tolerate partial shade, insufficient light can lead to leggy growth, reduced flowering, and a less vibrant foliage color. In hotter climates, some afternoon shade can be beneficial to prevent scorching of the leaves.
How do I care for Lamb's Ear?
Lamb’s Ear thrives in well-drained soil and prefers full sun to partial shade. Water deeply but infrequently, allowing the soil to dry out between waterings to prevent root rot. Fertilize sparingly, if at all, as excessive fertilization can reduce the plant’s characteristic silver color. Deadhead spent flower spikes to maintain a tidy appearance and encourage continued foliage growth.
How do I propagate Lamb's Ear?
Lamb’s Ear can be easily propagated through division or stem cuttings.
Last updated: April 30, 2026 — Plant care data reviewed and verified by our editorial team.