Lemongrass forms dense clumps that can reach three to five feet in height during a single growing season. If you’ve ever wondered how tall does lemongrass grow, the answer depends on your climate, care routine, and the specific variety you plant. This tropical grass is a favorite for gardens and kitchens alike, and knowing its height helps you plan your space.
You might be surprised to learn that lemongrass isn’t just a culinary herb—it’s a fast-growing ornamental grass. In the right conditions, it shoots up quickly, adding vertical interest to borders or containers. Let’s break down what affects its growth and how you can maximize its height.
How Tall Does Lemongrass Grow
Lemongrass typically grows between 3 and 5 feet tall, but some varieties can exceed 6 feet in ideal conditions. The exact height depends on factors like sunlight, water, soil quality, and whether you grow it in the ground or a pot. In cooler climates, it may stay shorter due to a limited growing season.
When you plant lemongrass from seed or a starter, it establishes roots first before putting energy into upward growth. Within a few months, you’ll see stalks lengthen and leaves spread. The plant’s height is measured from the base of the clump to the tip of the tallest leaf.
For a clear picture, here’s a quick breakdown of typical heights:
- In warm, tropical zones: 4 to 6 feet tall
- In temperate regions with full sun: 3 to 5 feet
- In containers or partial shade: 2 to 4 feet
- Dwarf varieties: 1 to 2 feet
Factors That Influence Lemongrass Height
Several key elements determine how tall your lemongrass will get. Pay attention to these to encourage maximum growth.
Sunlight is the most critical factor. Lemongrass needs at least 6 to 8 hours of direct sun daily. Without enough light, it becomes leggy and stays short. Place it in the sunniest spot in your garden.
Water matters too. Lemongrass likes consistent moisture but not soggy soil. Water deeply once or twice a week, more often in hot weather. Drought stress stunts growth and reduces height.
Soil should be rich, loamy, and well-draining. Add compost or aged manure before planting. Poor soil leads to weak, short plants. A pH between 6.0 and 7.5 is ideal.
Temperature plays a big role. Lemongrass thrives in warm weather between 70°F and 95°F. Frost kills it back to the ground. In cold climates, grow it as an annual or bring it indoors for winter.
How To Measure Lemongrass Height Accurately
To track your plant’s growth, measure from the soil line to the highest point of the leaves. Don’t include the flower stalks if they appear—those are temporary. Use a tape measure or ruler for precision.
Check height every two weeks during the growing season. You’ll notice rapid growth in summer, especially after rain or watering. Record your measurements to see patterns and adjust care.
If you’re comparing varieties, note that East Indian lemongrass (Cymbopogon flexuosus) tends to grow taller than West Indian lemongrass (Cymbopogon citratus). The West Indian type is more common in cooking and usually stays around 3 to 4 feet.
Lemongrass Height In Containers Vs. Ground
Growing lemongrass in a container limits its root space, which can reduce height. In a pot, expect 2 to 4 feet, depending on pot size. Use a container at least 12 inches deep and wide for best results.
In the ground, roots spread freely, allowing the plant to reach its full potential. Ground-grown lemongrass often hits 4 to 5 feet or more. Give it 2 to 3 feet of space between plants to avoid crowding.
Here’s a simple comparison:
- Ground planting: 4–6 feet tall, wider clumps
- Container (12-inch pot): 2–3 feet
- Container (18-inch pot): 3–4 feet
- Raised bed: 3–5 feet, similar to ground
Seasonal Growth Patterns
Lemongrass grows fastest in late spring and summer. In early spring, it emerges slowly as soil warms. By midsummer, you’ll see a growth spurt, often adding 1 to 2 feet per month in ideal conditions.
In fall, growth slows as temperatures drop. If you live in a frost-free area, it may continue growing slowly through winter. In cold climates, the plant goes dormant and dies back to the ground.
To extend the growing season, start seeds indoors 8 to 10 weeks before the last frost. Transplant after all danger of frost passes. This gives your lemongrass a head start on height.
Pruning And Its Effect On Height
Pruning lemongrass encourages bushier growth but doesn’t directly increase height. Remove dead or damaged leaves regularly. Cut back flower stalks if you want to focus energy on leaf and stalk growth.
If your lemongrass gets too tall and flops over, trim it back by one-third. This keeps it tidy and prevents breakage. Always use clean, sharp shears to avoid disease.
For maximum height, avoid heavy pruning during the growing season. Let the plant grow naturally, only removing what’s necessary. In late winter or early spring, cut the entire clump back to 6 inches to rejuvenate it.
Common Mistakes That Limit Height
Many gardeners accidentally stunt their lemongrass. Here are mistakes to avoid:
- Overwatering: Causes root rot, which stops growth
- Underwatering: Leads to wilting and short stalks
- Too much shade: Results in thin, short plants
- Poor soil: Lacks nutrients for tall growth
- Planting too close: Creates competition for resources
Fix these issues early to help your lemongrass reach its full height. If you notice yellowing leaves or slow growth, check your care routine first.
Lemongrass Height For Culinary Use
For cooking, you’ll want stalks that are at least 12 to 18 inches tall. The lower portion of the stalk is the most flavorful. Harvest when the plant is 2 to 3 feet tall for the best texture.
Taller stalks tend to be tougher at the base, but they still work for infusions and teas. Cut stalks at ground level, then remove the outer leaves. Use the tender inner part for recipes.
If you’re growing lemongrass for essential oils, let it reach full height before harvesting. Oil concentration increases as the plant matures. Harvest in late summer for the highest yield.
How To Encourage Taller Growth
Want your lemongrass to hit 5 feet or more? Follow these steps:
- Choose a full-sun location with at least 8 hours of light.
- Amend soil with compost or slow-release fertilizer high in nitrogen.
- Water consistently, keeping soil moist but not waterlogged.
- Apply a balanced fertilizer every 4 to 6 weeks during growing season.
- Mulch around the base to retain moisture and regulate soil temperature.
- Protect from frost with row covers or by moving containers indoors.
With these practices, your lemongrass can exceed average heights. Some gardeners report 6-foot plants in warm, humid climates like Florida or Hawaii.
Varieties And Their Maximum Heights
Not all lemongrass grows the same. Here are common types and their typical heights:
- West Indian lemongrass (Cymbopogon citratus): 3–4 feet, culinary favorite
- East Indian lemongrass (Cymbopogon flexuosus): 4–6 feet, used for oil
- Dwarf lemongrass (Cymbopogon citratus ‘Dwarf’): 1–2 feet, good for pots
- Java citronella (Cymbopogon winterianus): 5–7 feet, insect repellent
Check the label when buying plants or seeds. Dwarf varieties are perfect for small spaces, while standard types need room to spread. If height is your goal, choose East Indian or Java citronella.
Lemongrass Height In Different Climates
Climate dramatically affects how tall lemongrass grows. In USDA zones 9–11, it’s a perennial that can reach 5–6 feet. In zones 8 and below, it’s often grown as an annual, reaching 3–4 feet before frost.
In hot, humid areas like the Southeast US, lemongrass thrives and grows fast. In dry climates like the Southwest, it needs extra water to maintain height. In cool, coastal areas, growth is slower and shorter.
If you live in a cold region, consider growing lemongrass in a pot. Move it indoors before the first frost. With a sunny window, it can stay 2–3 feet tall year-round.
Frequently Asked Questions
How tall does lemongrass grow in one season?
In a single growing season, lemongrass typically reaches 3 to 5 feet, depending on conditions. With optimal care, it can hit 6 feet in warm climates.
Can lemongrass grow taller than 6 feet?
Yes, some varieties like Java citronella can exceed 6 feet. However, most garden lemongrass stays under 5 feet.
Why is my lemongrass not growing tall?
Common reasons include insufficient sunlight, poor soil, underwatering, or cold temperatures. Check these factors and adjust care.
Does lemongrass height affect its flavor?
No, flavor is consistent regardless of height. However, younger, shorter stalks are more tender for cooking.
How fast does lemongrass grow per month?
In peak summer, lemongrass can grow 1 to 2 feet per month. Growth slows in cooler weather or if the plant is stressed.
Final Tips For Growing Tall Lemongrass
Start with healthy plants or seeds from a reputable source. Give them plenty of room to spread. Fertilize regularly and water deeply. Watch for pests like spider mites or aphids, which can weaken the plant.
Harvest stalks from the outside of the clump to encourage new growth from the center. This keeps the plant productive and helps it reach maximum height over time.
Remember that lemongrass is a grass, so it grows from the base. Don’t cut the central growing point. With patience and proper care, you’ll enjoy a lush, tall clump that adds beauty and flavor to your garden.
By understanding how tall does lemongrass grow and what influences its height, you can plan your garden layout and harvest schedule. Whether you’re using it for tea, curries, or ornamental appeal, this versatile plant rewards you with vigorous growth and aromatic leaves.