Lemongrass typically reaches heights between two and four feet in most garden conditions. If you’ve ever wondered how tall does lemon grass grow in your backyard or container, the answer depends on climate, care, and variety. This aromatic herb is a favorite for teas, cooking, and natural pest control, but its vertical growth can surprise new gardeners. Let’s break down exactly what influences its height and how you can help it thrive.
How Tall Does Lemon Grass Grow
Lemongrass (Cymbopogon citratus) is a tropical perennial grass that forms dense clumps. Under ideal conditions—warmth, plenty of sun, and consistent moisture—it can stretch up to six feet in its native habitat. However, for most home gardeners, expect a more modest two to four feet. The key factor is your growing zone and whether you treat it as an annual or overwinter it indoors.
In cooler climates, lemongrass stays shorter because frost kills the leaves back. In USDA zones 9 and above, it can reach its full potential. Container-grown plants often top out around three feet due to restricted root space. So, how tall does lemon grass grow really comes down to your local environment and how much room you give its roots.
Typical Height Ranges By Growing Condition
- In-ground in tropical climates: 4 to 6 feet
- In-ground in temperate climates (summer only): 2 to 4 feet
- Large containers (10+ gallons): 3 to 4 feet
- Small pots (under 5 gallons): 1.5 to 2.5 feet
- Indoor or greenhouse grown: 1 to 3 feet, depending on light
These numbers are averages. Some vigorous varieties like East Indian lemongrass can push taller, while ornamental types stay shorter. Always check the specific cultivar you’re planting.
Factors That Influence Lemongrass Height
Sunlight Exposure
Lemongrass craves full sun—at least 6 to 8 hours daily. Less light means leggy, weak growth that stays shorter. If you grow it in partial shade, expect a stunted plant with thin stalks. For maximum height, place it in the brightest spot you have.
Soil Quality And Drainage
Rich, loamy soil with good drainage encourages deep root development. Sandy or clay-heavy soils restrict growth. Amend your soil with compost before planting. Lemongrass is a heavy feeder, so nutrient-rich dirt helps it reach its full stature.
Watering Consistency
This grass likes consistent moisture but not soggy feet. Water deeply once or twice a week, more in hot weather. Drought stress causes leaf tips to brown and slows vertical growth. Keep the soil evenly moist for best results.
Temperature And Climate
Lemongrass is frost-tender. Temperatures below 40°F (4°C) damage leaves and stop growth. In warm months, it grows rapidly. In cooler zones, treat it as an annual or bring it indoors before frost. The longer the warm season, the taller it gets.
Container Size
Pots restrict root spread, which directly limits height. A 5-gallon container is the minimum for a decent-sized plant. Larger pots (10–15 gallons) allow roots to roam, producing taller, bushier clumps. If you want a towering lemongrass, go big with your container.
How To Maximize Lemongrass Height
Step-By-Step Care Guide
- Choose the right variety. Common culinary lemongrass (Cymbopogon citratus) grows tallest. Avoid ornamental dwarf types if height is your goal.
- Plant in full sun. South-facing garden beds or patios work best.
- Prepare rich soil. Mix in aged manure or compost before planting.
- Water deeply and regularly. Don’t let the soil dry out completely.
- Fertilize monthly. Use a balanced 10-10-10 fertilizer or fish emulsion during the growing season.
- Mulch around the base. This retains moisture and keeps roots cool.
- Divide clumps every 2-3 years. Overcrowding reduces vigor and height.
- Protect from frost. Bring containers indoors or cover in-ground plants when temps drop.
Follow these steps, and your lemongrass will likely hit the upper end of its height range. Remember, patience is key—it takes a full growing season to reach maximum size.
Common Mistakes That Stunt Growth
- Overwatering in heavy clay soil leads to root rot and stunted plants.
- Underwatering during heat waves causes leaves to curl and stop growing.
- Planting in too-small containers restricts roots and limits height.
- Neglecting fertilizer results in pale, thin stalks that stay short.
- Cutting stalks too low during harvest weakens the plant.
Avoid these errors, and you’ll see a noticeable difference in how tall your lemongrass gets.
Lemongrass Height In Different Seasons
Spring Growth
After winter dormancy or planting, lemongrass starts slow. In early spring, it may only reach 6 to 12 inches. As soil warms, growth accelerates. By late spring, you’ll see 1 to 2 feet of new growth if conditions are right.
Summer Peak
Summer is when lemongrass explodes upward. With consistent heat and moisture, it can add 1 to 2 feet per month. By mid-summer, many plants reach their full height of 3 to 4 feet. In tropical zones, they may hit 5 feet by August.
Fall Slowdown
As days shorten and temperatures cool, growth slows. Leaves may begin to yellow. In temperate zones, this is when you should harvest and prepare for frost. Height stops increasing once night temps fall below 50°F.
Winter Dormancy
In cold climates, lemongrass dies back to the ground. If overwintered indoors, it may maintain a reduced height of 1 to 2 feet. Expect little to no vertical growth until spring returns.
Comparing Lemongrass To Other Ornamental Grasses
Lemongrass is often grouped with taller ornamental grasses, but it has distinct growth habits. Pampas grass can reach 10 feet, while lemongrass stays more compact. Fountain grass tops out around 3 feet, similar to lemongrass in containers. If you want a medium-height grass with culinary uses, lemongrass is a perfect choice.
Some gardeners confuse lemongrass with lemon balm or lemon verbena. Those are broadleaf herbs, not grasses, and grow much shorter—usually 1 to 2 feet. Lemongrass’s upright, clumping form is unique.
Harvesting And Its Effect On Height
Harvesting lemongrass stalks doesn’t permanently stunt the plant if done correctly. Cut individual stalks at ground level once they’re at least 12 inches tall. Avoid cutting more than one-third of the clump at once. Regular harvesting actually encourages new growth and can lead to a denser, though not necessarily taller, plant.
If you want maximum height, let some stalks grow untouched for the entire season. These will become the tallest in the clump. Harvest only the outer, older stalks to keep the center vigorous.
Lemongrass Height In Different Varieties
Common Culinary Lemongrass (Cymbopogon Citratus)
This is the standard type for cooking. It grows 3 to 5 feet tall in ideal conditions. It’s the most widely available and reliable for height.
East Indian Lemongrass (Cymbopogon Flexuosus)
Used for essential oil production, this variety can reach 6 feet or more. It’s more heat-tolerant and slightly more cold-hardy. If you want the tallest lemongrass, choose this one.
Ornamental Dwarf Lemongrass
Some cultivars are bred for compact growth, staying under 2 feet. These are great for small spaces but won’t give you the towering look. Check the label before buying.
Citronella Grass (Cymbopogon Nardus)
Often confused with lemongrass, citronella grass grows 5 to 6 feet tall. It’s used for mosquito repellent but has a stronger, less pleasant flavor. It’s taller but not ideal for cooking.
Frequently Asked Questions
How tall does lemon grass grow in a pot?
In a standard 5-gallon pot, lemongrass typically reaches 2 to 3 feet. Larger containers (10 gallons or more) can support 3 to 4 feet. Pot size directly limits root expansion, so bigger pots yield taller plants.
How tall does lemon grass grow in one season?
From a spring planting, lemongrass can grow 2 to 4 feet by fall in warm climates. In cooler zones, expect 1.5 to 3 feet. The first year is often shorter; plants get taller in subsequent seasons if overwintered.
Can lemongrass grow taller than 6 feet?
Rarely in home gardens. In tropical regions with year-round warmth and rich soil, East Indian varieties can exceed 6 feet. Most home growers will see a maximum of 4 to 5 feet.
Why is my lemongrass not growing tall?
Common reasons include insufficient sunlight, poor soil, overwatering or underwatering, small containers, or cold temperatures. Check each factor and adjust. Also, ensure you’re not harvesting too aggressively.
Does lemongrass height affect its flavor?
No. Flavor is more about variety and growing conditions than height. Stalks from a shorter plant can be just as flavorful. However, older, taller stalks may be tougher and less tender.
Final Tips For Growing Tall Lemongrass
Start with a healthy transplant or stalk from the grocery store. Place it in the sunniest spot you have. Water consistently and fertilize monthly. If you live in a cold climate, grow it in a container you can move indoors. With the right care, you’ll see impressive vertical growth.
Remember that lemongrass is a grass, so it grows from the base. New shoots emerge from the center of the clump. Don’t be alarmed if outer leaves die back—that’s normal. Just remove them to keep the plant tidy.
For the tallest plants, give them space. Crowded clumps compete for resources and stay shorter. Divide every few years to maintain vigor. And don’t forget to enjoy the lemony scent every time you brush against the leaves.
So, how tall does lemon grass grow? In most gardens, you’ll get 2 to 4 feet with proper care. With a little extra attention—full sun, rich soil, and ample water—you might push it to 5 feet or more. It’s a rewarding plant that adds both beauty and utility to your space.
Whether you’re using it for tea, stir-fries, or simply as an ornamental, knowing its growth potential helps you plan your garden layout. Plant it where it won’t shade smaller herbs, and give it room to spread. Your lemongrass will reward you with a lush, tall clump that lasts for years.