Lawn
Cutting lemon grass right keeps it growing like crazy. ✂️ I’ve harvested from the same clump for three years now, and the secret is knowing exactly where—and when—to make the cut without killing the plant. One wrong slice, and you’ll stunt growth for months.
The best time is after the plant’s matured about 12 inches tall, using a sharp knife or clean pruning shears. You’ll want to cut the stalks about 6 inches above the soil line, leaving the base intact—this is where new shoots emerge.
Never cut more than a third of the plant at once, or you’ll shock it into dormancy.
What you harvest can go straight to your kitchen or root to grow new plants.
The bottom 4–6 inches of stalk has the best flavor, while the top can be used for propagation—just stick it in moist soil, and within 4–6 weeks, you’ll have a new clump ready to harvest.
Keep the soil moist but not soggy after cutting, and fertilize lightly with compost or balanced fertilizer. My plants bounce back faster than I expected, and with proper care, you’ll have fresh lemon grass year-round—no store-bought substitutes needed.
📚 In This Guide
- What you need
- Instructions
- Tips and common mistakes
- Wrapping up and next steps
What you need
- ● Mature lemon grass plant(s) – At least 12–18 months old (thicker stalks yield more flavor).
- ● Sharp chef’s knife or pruning shears – A serrated blade (8–10 inches) works best for clean cuts.
- ● Cutting board or stable surface – A hard, flat surface (like a wooden board or concrete) prevents slipping.
- ● Measuring tape or ruler – To mark 3–4 inches from the base for precise cuts.
- ○ Gloves (optional but recommended) – Lemon grass has sharp edges that can irritate skin.
- ● Water spray bottle – Keeps blades moist for cleaner cuts and reduces dust.
- ● Plastic wrap or zip-top bag – Store cut stalks in the fridge for up to 2 weeks.
- ● Food processor or mortar & pestle – For mincing fresh lemon grass into pastes or powders.
- ● Disinfectant spray (70% isopropyl alcohol) – Sanitizes tools between cuts for hygiene.
- ● Marking pen – Helps label regrowth stages if propagating new plants.
Step-by-Step instructions for harvesting lemon grass
Here's how to get the most from your lemon grass plant without harming future growth.
🌿 Step 1: Identify the Right Stems to Harvest
Lemon grass grows in clumps, and you'll want to harvest the mature stems—those with 3-4 inches of thick, pale bulbous base and long, slender green leaves. Look for stems that are at least 12 inches tall with fully developed leaves. These are your best candidates for cutting, as they've stored enough nutrients to regrow.
I always harvest from the outermost stems first, leaving the center stems to continue growing. This prevents overcrowding and ensures your plant keeps producing. If you're unsure which stems to take, run your fingers along the base—thick, firm stems are ready, while thin or woody ones should stay.
✂️ Step 2: Use the Right Tools and Technique
Grab a sharp chef's knife or pruning shears—dull blades crush stems and make a mess. Hold the stem at a 45-degree angle, about 1-2 inches above the bulbous base. This angle helps water run off the cut and prevents rot. A clean cut also looks better and heals faster than a jagged one.
Slice through the stem firmly but don’t saw back and forth—one smooth motion is all you need. If you’re harvesting multiple stems, I like to cut them all at once and bundle them together for storage. This keeps the flavor fresh longer and makes prep easier when you’re ready to use them.
💧 Step 3: Post-Harvest Care for Your Plant
After cutting, your lemon grass plant will need time to recover. Water it deeply right after harvesting to help it bounce back. The roots will draw up moisture to support new growth, so soil should feel damp 2-3 inches down after watering. Avoid overwatering, though—soggy soil can rot the remaining stems.
In 3-4 weeks, you’ll see new shoots emerging from the center of the plant. These are your next harvest candidates! If your lemon grass is in full sun, it’ll regrow faster. If it’s in shade, move it to a bright spot with at least 4-6 hours of sunlight to encourage vigorous regrowth.
🌱 Step 4: Store Harvested Stems Properly
Trim the green leaves down to 4-5 inches if you’re storing the stems whole—this reduces moisture loss. Wrap the cut ends in a damp paper towel, then place them in a ziplock bag. Store in the crispest part of your fridge (usually the back of the shelf) where it stays 50-55°F. This keeps them fresh for up to 2 weeks.
For immediate use, you can also freeze the stems. Peel off the tough outer layers, chop the tender inner stalks, and store in an airtight container for up to 6 months. Frozen lemon grass works great in soups, curries, and marinades—just thaw and use as needed.
⏰ Step 5: Know When to Prune for Health
If your lemon grass plant looks crowded, leggy, or overgrown, it’s time for a renewal prune. Cut back all the stems to 4-6 inches above the base in early spring before new growth starts. This encourages a fuller, bushier plant and prevents disease from stagnant air in dense clumps.
After a renewal prune, your plant might look sad for a week or two—but don’t worry. With consistent watering and bright light, it’ll bounce back stronger. I’ve revived plants that looked nearly dead after a hard prune, so don’t hesitate to give it a chance!
Tips & tricks for perfect lemon grass harvesting
Here's what I've learned after harvesting lemon grass for years—these tricks will help you get the most from your plant without sacrificing future growth.
Selection Tip: The 12-inch height requirement in Step 1 is non-negotiable—shorter stems won't have developed enough flavor or nutrients to regrow properly. I've made the mistake of harvesting smaller stems, and they always produce weaker regrowth. Look for that thick, pale bulbous base as your key indicator of maturity. The outer stems are always your best bet because they've had more time to develop flavor while protecting the inner growth.
Cutting Technique: That 45-degree angle in Step 2 isn't just about looks—it's about plant health. The angled cut creates a larger surface area for water absorption, which helps the plant recover faster. I've found that making the cut about 1-2 inches above the bulb helps prevent rot while still allowing plenty of growth potential. And remember, one smooth motion is everything—hesitation creates jagged cuts that can invite disease.
Storage Wisdom: When storing whole stems as described in Step 4, I've discovered a little trick to extend freshness beyond the 2 weeks: after trimming to 4-5 inches, wrap the cut ends in a damp paper towel AND place a second dry towel on top before sealing the bag. This double-layer method keeps the cut ends hydrated while preventing excess moisture buildup that could cause spoilage. The crispest part of your fridge (50-55°F) is perfect—it's cool enough to slow decay but not so cold it freezes the stems.
Pro Tips for Cut Lemon Grass Plant
- Here's what I've learned after harvesting lemon grass for years—these tricks will help you get the most from your pla...
- Selection Tip: The 12-inch height requirement in Step 1 is non-negotiable—shorter stems won't have developed enough f...
- Cutting Technique: That 45-degree angle in Step 2 isn't just about looks—it's about plant health. The angled cut crea...
Frequently asked questions
Got questions about cutting lemon grass? You’re not alone! Here are some of the most common concerns—and their straightforward answers—to help you harvest like a pro.
When is the best time to cut lemon grass for maximum flavor?
The best time to harvest lemon grass is when the stalks are mature but still tender—usually 6-12 months after planting. Aim for stalks that are 3-4 feet tall and have a diameter of about 1/2 inch. Morning harvests (after dew dries) ensure the highest essential oil content, which boosts flavor and aroma. Avoid cutting during extreme heat or frost, as this can stress the plant.
How do I cut lemon grass without killing the plant?
Always cut 3-4 inches above the base of the stalk to allow regrowth. Use a sharp knife or pruning shears to make a clean cut—never tear the stalk. Leave at least 6-8 healthy stalks per clump to ensure the plant continues producing. If you’re harvesting multiple stalks, space out cuts over time to avoid over-stressing the plant.
Can I cut lemon grass in the winter? What about in cold climates?
Lemon grass is tropical and cannot tolerate frost. In cold climates, grow it in containers and bring it indoors before temperatures drop below 50°F (10°C). If you must harvest in winter, do so before the first frost and store the stalks in the freezer. For outdoor plants, mulch heavily to protect the roots, but avoid cutting until spring when growth resumes.
How often can I harvest lemon grass from the same plant?
With proper care, you can harvest lemon grass every 4-6 weeks from the same plant. After cutting, new shoots will sprout from the base within 2-3 months. To maximize yield, avoid cutting more than 1/3 of the stalks at once. Over-harvesting weakens the plant, so balance frequency with plant health—listen to your lemon grass!
What do I do if my lemon grass turns yellow or dies after cutting?
Yellowing or dying lemon grass usually signals over-harvesting, poor drainage, or root rot. If this happens, stop cutting immediately and check the soil—it should be well-draining and slightly moist. Trim any dead or yellow leaves and water at the base (not the leaves) to prevent fungal issues. If the plant is still healthy at the base, it’ll likely recover in 2-4 weeks.
Can I use regular scissors or a dull knife to cut lemon grass?
No!
Always use a sharp, clean knife or pruning shears to avoid crushing the stalks or spreading disease. A dull blade tears fibers, making the plant more susceptible to rot. If you don’t have a sharp tool, invest in a serrated knife or garden shears—your lemon grass (and future harvests) will thank you!
Wrapping up and next steps
Cutting your lemon grass plant the right way ensures a bountiful harvest while keeping the plant healthy and thriving.
Now that you’re equipped with the know-how, grab your knife and get harvesting! Share your lemon grass success with fellow gardeners or experiment with new recipes—whether it’s zesty teas, aromatic soups, or homemade cleaning products. Happy growing! 🌱